In a Linux KVM guest that has PV TLB enabled, a process in the guest kernel may be able to read memory locations from another process in the same guest. This problem is limit to the host running linux kernel 4.10 with a guest running linux kernel 4.16 or later. The problem mainly affects AMD processors but Intel CPUs cannot be ruled out.

The remote Oracle Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2020-3010 advisory.

  - In a Linux KVM guest that has PV TLB enabled, a process in the guest kernel may be able to read memory     locations from another process in the same guest. This problem is limit to the host running linux kernel     4.10 with a guest running linux kernel 4.16 or later. The problem mainly affects AMD processors but Intel     CPUs cannot be ruled out. (CVE-2019-3016)

  - An issue was found in Linux kernel before 5.5.4. mwifiex_ret_wmm_get_status() in     drivers/net/wireless/marvell/mwifiex/wmm.c allows a remote AP to trigger a heap-based buffer overflow     because of an incorrect memcpy, aka CID-3a9b153c5591. (CVE-2020-12654)

  - An issue was found in Linux kernel before 5.5.4. The mwifiex_cmd_append_vsie_tlv() function in     drivers/net/wireless/marvell/mwifiex/scan.c allows local users to gain privileges or cause a denial of     service because of an incorrect memcpy and buffer overflow, aka CID-b70261a288ea. (CVE-2020-12653)

  - The VFIO PCI driver in the Linux kernel through 5.6.13 mishandles attempts to access disabled memory     space. (CVE-2020-12888)

  - A flaw was found in the Linux Kernel in versions after 4.5-rc1 in the way mremap handled DAX Huge Pages.
    This flaw allows a local attacker with access to a DAX enabled storage to escalate their privileges on the     system. (CVE-2020-10757)

  - In the Linux kernel before 5.3.11, sound/core/timer.c has a use-after-free caused by erroneous code     refactoring, aka CID-e7af6307a8a5. This is related to snd_timer_open and snd_timer_close_locked. The     timeri variable was originally intended to be for a newly created timer instance, but was used for a     different purpose after refactoring. (CVE-2019-19807)

  - A logic bug flaw was found in Linux kernel before 5.8-rc1 in the implementation of SSBD. A bug in the     logic handling allows an attacker with a local account to disable SSBD protection during a context switch     when additional speculative execution mitigations are in place. This issue was introduced when the per     task/process conditional STIPB switching was added on top of the existing SSBD switching. The highest     threat from this vulnerability is to confidentiality. (CVE-2020-10766)

  - A flaw was found in the Linux Kernel before 5.8-rc1 in the prctl() function, where it can be used to     enable indirect branch speculation after it has been disabled. This call incorrectly reports it as being     'force disabled' when it is not and opens the system to Spectre v2 attacks. The highest threat from this     vulnerability is to confidentiality. (CVE-2020-10768)

  - A flaw was found in the Linux kernel before 5.8-rc1 in the implementation of the Enhanced IBPB (Indirect     Branch Prediction Barrier). The IBPB mitigation will be disabled when STIBP is not available or when the     Enhanced Indirect Branch Restricted Speculation (IBRS) is available. This flaw allows a local attacker to     perform a Spectre V2 style attack when this configuration is active. The highest threat from this     vulnerability is to confidentiality. (CVE-2020-10767)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The version of tested product installed on the remote host is prior to tested version. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2-2020-1480 advisory.

  - The Serial Attached SCSI (SAS) implementation in the Linux kernel through 4.15.9 mishandles a mutex within     libsas, which allows local users to cause a denial of service (deadlock) by triggering certain error-     handling code. (CVE-2017-18232)

  - The unimac_mdio_probe function in drivers/net/phy/mdio-bcm-unimac.c in the Linux kernel through 4.15.8     does not validate certain resource availability, which allows local users to cause a denial of service     (NULL pointer dereference). (CVE-2018-8043)

  - A memory leak in the ccp_run_sha_cmd() function in drivers/crypto/ccp/ccp-ops.c in the Linux kernel     through 5.3.9 allows attackers to cause a denial of service (memory consumption), aka CID-128c66429247.
    (CVE-2019-18808)

  - A memory leak in the cx23888_ir_probe() function in drivers/media/pci/cx23885/cx23888-ir.c in the Linux     kernel through 5.3.11 allows attackers to cause a denial of service (memory consumption) by triggering     kfifo_alloc() failures, aka CID-a7b2df76b42b. (CVE-2019-19054)

  - A memory leak in the adis_update_scan_mode_burst() function in drivers/iio/imu/adis_buffer.c in the Linux     kernel before 5.3.9 allows attackers to cause a denial of service (memory consumption), aka     CID-9c0530e898f3. (CVE-2019-19061)

  - Memory leaks in drivers/net/wireless/ath/ath9k/htc_hst.c in the Linux kernel through 5.3.11 allow     attackers to cause a denial of service (memory consumption) by triggering wait_for_completion_timeout()     failures. This affects the htc_config_pipe_credits() function, the htc_setup_complete() function, and the     htc_connect_service() function, aka CID-853acf7caf10. (CVE-2019-19073)

  - A memory leak in the ath9k_wmi_cmd() function in drivers/net/wireless/ath/ath9k/wmi.c in the Linux kernel     through 5.3.11 allows attackers to cause a denial of service (memory consumption), aka CID-728c1e2a05e4.
    (CVE-2019-19074)

  - In a Linux KVM guest that has PV TLB enabled, a process in the guest kernel may be able to read memory     locations from another process in the same guest. This problem is limit to the host running linux kernel     4.10 with a guest running linux kernel 4.16 or later. The problem mainly affects AMD processors but Intel     CPUs cannot be ruled out. (CVE-2019-3016)

  - In the Android kernel in F2FS driver there is a possible out of bounds read due to a missing bounds check.
    This could lead to local information disclosure with system execution privileges needed. User interaction     is not needed for exploitation. (CVE-2019-9445)

  - An issue was discovered in xfs_agf_verify in fs/xfs/libxfs/xfs_alloc.c in the Linux kernel through 5.6.10.
    Attackers may trigger a sync of excessive duration via an XFS v5 image with crafted metadata, aka     CID-d0c7feaf8767. (CVE-2020-12655)

  - In the Linux kernel through 5.7.6, usbtest_disconnect in drivers/usb/misc/usbtest.c has a memory leak, aka     CID-28ebeb8db770. (CVE-2020-15393)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote Redhat Enterprise Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2020:3016 advisory.

  - kernel: use-after-free in sound/core/timer.c (CVE-2019-19807)

  - kernel: kvm: Information leak within a KVM guest (CVE-2019-3016)

  - kernel: kernel: DAX hugepages not considered during mremap (CVE-2020-10757)

  - kernel: Rogue cross-process SSBD shutdown. Linux scheduler logical bug allows an attacker to turn off the     SSBD protection. (CVE-2020-10766)

  - kernel: Indirect Branch Prediction Barrier is force-disabled when STIBP is unavailable or enhanced IBRS is     available. (CVE-2020-10767)

  - kernel: Indirect branch speculation can be enabled after it was force-disabled by the     PR_SPEC_FORCE_DISABLE prctl command. (CVE-2020-10768)

  - kernel: buffer overflow in mwifiex_cmd_append_vsie_tlv function in     drivers/net/wireless/marvell/mwifiex/scan.c (CVE-2020-12653)

  - kernel: heap-based buffer overflow in mwifiex_ret_wmm_get_status function in     drivers/net/wireless/marvell/mwifiex/wmm.c (CVE-2020-12654)

  - Kernel: vfio: access to disabled MMIO space of some devices may lead to DoS scenario (CVE-2020-12888)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Redhat Enterprise Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2020:3010 advisory.

  - kernel: use-after-free in sound/core/timer.c (CVE-2019-19807)

  - kernel: kvm: Information leak within a KVM guest (CVE-2019-3016)

  - kernel: kernel: DAX hugepages not considered during mremap (CVE-2020-10757)

  - kernel: Rogue cross-process SSBD shutdown. Linux scheduler logical bug allows an attacker to turn off the     SSBD protection. (CVE-2020-10766)

  - kernel: Indirect Branch Prediction Barrier is force-disabled when STIBP is unavailable or enhanced IBRS is     available. (CVE-2020-10767)

  - kernel: Indirect branch speculation can be enabled after it was force-disabled by the     PR_SPEC_FORCE_DISABLE prctl command. (CVE-2020-10768)

  - kernel: buffer overflow in mwifiex_cmd_append_vsie_tlv function in     drivers/net/wireless/marvell/mwifiex/scan.c (CVE-2020-12653)

  - kernel: heap-based buffer overflow in mwifiex_ret_wmm_get_status function in     drivers/net/wireless/marvell/mwifiex/wmm.c (CVE-2020-12654)

  - Kernel: vfio: access to disabled MMIO space of some devices may lead to DoS scenario (CVE-2020-12888)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Several vulnerabilities have been discovered in the Linux kernel that may lead to a privilege escalation, denial of service or information leaks.

  - CVE-2019-3016     It was discovered that the KVM implementation for x86     did not always perform TLB flushes when needed, if the     paravirtualised TLB flush feature was enabled. This     could lead to disclosure of sensitive information within     a guest VM.

  - CVE-2019-19462     The syzkaller tool found a missing error check in the     'relay' library used to implement various files under     debugfs. A local user permitted to access debugfs could     use this to cause a denial of service (crash) or     possibly for privilege escalation.

  - CVE-2020-0543     Researchers at VU Amsterdam discovered that on some     Intel CPUs supporting the RDRAND and RDSEED     instructions, part of a random value generated by these     instructions may be used in a later speculative     execution on any core of the same physical CPU.
    Depending on how these instructions are used by     applications, a local user or VM guest could use this to     obtain sensitive information such as cryptographic keys     from other users or VMs.

  This vulnerability can be mitigated by a microcode update, either as   part of system firmware (BIOS) or through the intel-microcode   package in Debian's non-free archive section. This kernel update   only provides reporting of the vulnerability and the option to   disable the mitigation if it is not needed.

  - CVE-2020-10711     Matthew Sheets reported NULL pointer dereference issues     in the SELinux subsystem while receiving CIPSO packet     with null category. A remote attacker can take advantage     of this flaw to cause a denial of service (crash). Note     that this issue does not affect the binary packages     distributed in Debian as CONFIG_NETLABEL is not enabled.

  - CVE-2020-10732     An information leak of kernel private memory to     userspace was found in the kernel's implementation of     core dumping userspace processes.

  - CVE-2020-10751     Dmitry Vyukov reported that the SELinux subsystem did     not properly handle validating multiple messages, which     could allow a privileged attacker to bypass SELinux     netlink restrictions.

  - CVE-2020-10757     Fan Yang reported a flaw in the way mremap handled DAX     hugepages, allowing a local user to escalate their     privileges.

  - CVE-2020-12114     Piotr Krysiuk discovered a race condition between the     umount and pivot_root operations in the filesystem core     (vfs). A local user with the CAP_SYS_ADMIN capability in     any user namespace could use this to cause a denial of     service (crash).

  - CVE-2020-12464     Kyungtae Kim reported a race condition in the USB core     that can result in a use-after-free. It is not clear how     this can be exploited, but it could result in a denial     of service (crash or memory corruption) or privilege     escalation.

  - CVE-2020-12768     A bug was discovered in the KVM implementation for AMD     processors, which could result in a memory leak. The     security impact of this is unclear.

  - CVE-2020-12770     It was discovered that the sg (SCSI generic) driver did     not correctly release internal resources in a particular     error case. A local user permitted to access an sg     device could possibly use this to cause a denial of     service (resource exhaustion).

  - CVE-2020-13143     Kyungtae Kim reported a potential heap out-of-bounds     write in the USB gadget subsystem. A local user     permitted to write to the gadget configuration     filesystem could use this to cause a denial of service     (crash or memory corruption) or potentially for     privilege escalation.

According to the versions of the kernel packages installed, the EulerOS Virtualization for ARM 64 installation on the remote host is affected by the following vulnerabilities :

  - The kernel package contains the Linux kernel (vmlinuz),     the core of any Linux operating system. The kernel     handles the basic functions of the operating system:
    memory allocation, process allocation, device input and     output, etc. Security Fix(es):In the Linux kernel     before 5.2.9, there is an info-leak bug that can be     caused by a malicious USB device in the     driverset/can/usb/peak_usb/pcan_usb_pro.c driver, aka     CID-ead16e53c2f0.(CVE-2019-19536)In the Linux kernel     before 5.2.9, there is an info-leak bug that can be     caused by a malicious USB device in the     driverset/can/usb/peak_usb/pcan_usb_fd.c driver, aka     CID-30a8beeb3042.(CVE-2019-19535)vcs_write in     drivers/tty/vt/vc_screen.c in the Linux kernel through     5.3.13 does not prevent write access to vcsu devices,     aka CID-0c9acb1af77a.(CVE-2019-19252)In the AppleTalk     subsystem in the Linux kernel before 5.1, there is a     potential NULL pointer dereference because     register_snap_client may return NULL. This will lead to     denial of service in net/appletalk/aarp.c and     net/appletalk/ddp.c, as demonstrated by     unregister_snap_client, aka     CID-9804501fa122.(CVE-2019-19227)A memory leak in the     adis_update_scan_mode() function in     drivers/iio/imu/adis_buffer.c in the Linux kernel     before 5.3.9 allows attackers to cause a denial of     service (memory consumption), aka     CID-ab612b1daf41.(CVE-2019-19060)In the Linux kernel     before 5.3.11, there is an info-leak bug that can be     caused by a malicious USB device in the     driverset/can/usb/peak_usb/pcan_usb_core.c driver, aka     CID-f7a1337f0d29.(CVE-2019-19534)In the Linux kernel     before 5.3.11, there is a use-after-free bug that can     be caused by a malicious USB device in the     driverset/can/usb/mcba_usb.c driver, aka     CID-4d6636498c41.(CVE-2019-19529)In the Linux kernel     before 5.3.9, there is a use-after-free bug that can be     caused by a malicious USB device in the     driversfc/pn533/usb.c driver, aka     CID-6af3aa57a098.(CVE-2019-19526)In the Linux kernel     before 5.3.6, there is a use-after-free bug that can be     caused by a malicious USB device in the     driverset/ieee802154/atusb.c driver, aka     CID-7fd25e6fc035.(CVE-2019-19525)In the Linux kernel     before 5.3.9, there are multiple out-of-bounds write     bugs that can be caused by a malicious USB device in     the Linux kernel HID drivers, aka CID-d9d4b1e46d95.
    This affects drivers/hid/hid-axff.c,     drivers/hid/hid-dr.c, drivers/hid/hid-emsff.c,     drivers/hid/hid-gaff.c, drivers/hid/hid-holtekff.c,     drivers/hid/hid-lg2ff.c, drivers/hid/hid-lg3ff.c,     drivers/hid/hid-lg4ff.c, drivers/hid/hid-lgff.c,     drivers/hid/hid-logitech-hidpp.c,     drivers/hid/hid-microsoft.c, drivers/hid/hid-sony.c,     drivers/hid/hid-tmff.c, and     drivers/hid/hid-zpff.c.(CVE-2019-19532)In the Linux     kernel before 5.2.10, there is a use-after-free bug     that can be caused by a malicious USB device in the     drivers/hid/usbhid/hiddev.c driver, aka     CID-9c09b214f30e.(CVE-2019-19527)** DISPUTED ** The     Linux kernel through 5.0.7, when CONFIG_IA32_AOUT is     enabled and ia32_aout is loaded, allows local users to     bypass ASLR on setuid a.out programs (if any exist)     because install_exec_creds() is called too late in     load_aout_binary() in fs/binfmt_aout.c, and thus the     ptrace_may_access() check has a race condition when     reading /proc/pid/stat. NOTE: the software maintainer     disputes that this is a vulnerability because ASLR for     a.out format executables has never been     supported.(CVE-2019-11191)In the Linux kernel before     5.3.12, there is a use-after-free bug that can be     caused by a malicious USB device in the     drivers/input/ff-memless.c driver, aka     CID-fa3a5a1880c9.(CVE-2019-19524)driverset/wireless/mar     vell/libertas/if_sdio.c in the Linux kernel 5.2.14 does     not check the alloc_workqueue return value, leading to     a NULL pointer     dereference.(CVE-2019-16232)driverset/fjes/fjes_main.c     in the Linux kernel 5.2.14 does not check the     alloc_workqueue return value, leading to a NULL pointer     dereference.(CVE-2019-16231)** DISPUTED **     drivers/gpu/drm/amd/amdkfd/kfd_interrupt.c in the Linux     kernel 5.2.14 does not check the alloc_workqueue return     value, leading to a NULL pointer dereference. NOTE: The     security community disputes this issues as not being     serious enough to be deserving a CVE     id.(CVE-2019-16229)Linux kernel CIFS implementation,     version 4.9.0 is vulnerable to a relative paths     injection in directory entry lists.(CVE-2019-10220)A     heap overflow flaw was found in the Linux kernel, all     versions 3.x.x and 4.x.x before 4.18.0, in Marvell WiFi     chip driver. The vulnerability allows a remote attacker     to cause a system crash, resulting in a denial of     service, or execute arbitrary code. The highest threat     with this vulnerability is with the availability of the     system. If code execution occurs, the code will run     with the permissions of root. This will affect both     confidentiality and integrity of files on the     system.(CVE-2019-14901)The Linux kernel before 5.4.2     mishandles ext4_expand_extra_isize, as demonstrated by     use-after-free errors in __ext4_expand_extra_isize and     ext4_xattr_set_entry, related to fs/ext4/inode.c and     fs/ext4/super.c, aka CID-4ea99936a163.(CVE-2019-19767)A     heap-based buffer overflow was discovered in the Linux     kernel, all versions 3.x.x and 4.x.x before 4.18.0, in     Marvell WiFi chip driver. The flaw could occur when the     station attempts a connection negotiation during the     handling of the remote devices country settings. This     could allow the remote device to cause a denial of     service (system crash) or possibly execute arbitrary     code.(CVE-2019-14895)Linux Kernel could allow a local     authenticated attacker to obtain sensitive information,     caused by a Transaction Asynchronous Abort (TAA) h/w     issue in KVM. By sending a specially-crafted request,     an attacker could exploit this vulnerability to obtain     sensitive information, and use this information to     launch further attacks against the affected     system.(CVE-2019-19338)TSX Asynchronous Abort condition     on some CPUs utilizing speculative execution may allow     an authenticated user to potentially enable information     disclosure via a side channel with local     access.(CVE-2019-11135)An out-of-bounds memory write     issue was found in the Linux Kernel, version 3.13     through 5.4, in the way the Linux kernel's KVM     hypervisor handled the 'KVM_GET_EMULATED_CPUID'     ioctl(2) request to get CPUID features emulated by the     KVM hypervisor. A user or process able to access the     '/dev/kvm' device could use this flaw to crash the     system, resulting in a denial of     service.(CVE-2019-19332)kernel/sched/fair.c in the     Linux kernel before 5.3.9, when cpu.cfs_quota_us is     used (e.g., with Kubernetes), allows attackers to cause     a denial of service against non-cpu-bound applications     by generating a workload that triggers unwanted slice     expiration, aka CID-de53fd7aedb1. (In other words,     although this slice expiration would typically be seen     with benign workloads, it is possible that an attacker     could calculate how many stray requests are required to     force an entire Kubernetes cluster into a     low-performance state caused by slice expiration, and     ensure that a DDoS attack sent that number of stray     requests. An attack does not affect the stability of     the kernel it only causes mismanagement of application     execution.)(CVE-2019-19922)A stack-based buffer     overflow was found in the Linux kernel, version     kernel-2.6.32, in Marvell WiFi chip driver. An attacker     is able to cause a denial of service (system crash) or,     possibly execute arbitrary code, when a STA works in     IBSS mode (allows connecting stations together without     the use of an AP) and connects to another     STA.(CVE-2019-14897)A heap-based buffer overflow     vulnerability was found in the Linux kernel, version     kernel-2.6.32, in Marvell WiFi chip driver. A remote     attacker could cause a denial of service (system crash)     or, possibly execute arbitrary code, when the     lbs_ibss_join_existing function is called after a STA     connects to an AP.(CVE-2019-14896)In the Linux kernel     through 5.4.6, there are information leaks of     uninitialized memory to a USB device in the     driverset/can/usb/kvaser_usb/kvaser_usb_leaf.c driver,     aka CID-da2311a6385c.(CVE-2019-19947)In the Linux     kernel before 5.1, there is a memory leak in
    __feat_register_sp() in net/dccp/feat.c, which may     cause denial of service, aka     CID-1d3ff0950e2b.(CVE-2019-20096)mwifiex_tm_cmd in     driverset/wireless/marvell/mwifiex/cfg80211.c in the     Linux kernel before 5.1.6 has some error-handling cases     that did not free allocated hostcmd memory, aka     CID-003b686ace82. This will cause a memory leak and     denial of service.(CVE-2019-20095)An exploitable     denial-of-service vulnerability exists in the Linux     kernel prior to mainline 5.3. An attacker could exploit     this vulnerability by triggering AP to send IAPP     location updates for stations before the required     authentication process has completed. This could lead     to different denial-of-service scenarios, either by     causing CAM table attacks, or by leading to traffic     flapping if faking already existing clients in other     nearby APs of the same wireless infrastructure. An     attacker can forge Authentication and Association     Request packets to trigger this     vulnerability.(CVE-2019-5108)In a Linux KVM guest that     has PV TLB enabled, a process in the guest kernel may     be able to read memory locations from another process     in the same guest. This problem is limit to the host     running linux kernel 4.10 with a guest running linux     kernel 4.16 or later. The problem mainly affects AMD     processors but Intel CPUs cannot be ruled     out.(CVE-2019-3016)fsamei.c in the Linux kernel before     5.5 has a may_create_in_sticky use-after-free, which     allows local users to cause a denial of service (OOPS)     or possibly obtain sensitive information from kernel     memory, aka CID-d0cb50185ae9. One attack vector may be     an open system call for a UNIX domain socket, if the     socket is being moved to a new parent directory and its     old parent directory is being     removed.(CVE-2020-8428)There is a use-after-free     vulnerability in the Linux kernel through 5.5.2 in the     n_tty_receive_buf_common function in     drivers/tty_tty.c.(CVE-2020-8648)An issue was     discovered in the Linux kernel through 5.5.6. set_fdc     in drivers/block/floppy.c leads to a wait_til_ready     out-of-bounds read because the FDC index is not checked     for errors before assigning it, aka     CID-2e90ca68b0d2.(CVE-2020-9383)There is a     use-after-free vulnerability in the Linux kernel     through 5.5.2 in the vgacon_invert_region function in     drivers/video/console/vgacon.c.(CVE-2020-8649)There is     a use-after-free vulnerability in the Linux kernel     through 5.5.2 in the vc_do_resize function in     drivers/tty/vt/vt.c.(CVE-2020-8647)In the Linux kernel     5.0.21, mounting a crafted ext4 filesystem image,     performing some operations, and unmounting can lead to     a use-after-free in ext4_put_super in fs/ext4/super.c,     related to dump_orphan_list in     fs/ext4/super.c.(CVE-2019-19447)A flaw was discovered     in the way that the KVM hypervisor handled instruction     emulation for an L2 guest when nested virtualisation is     enabled. Under some circumstances, an L2 guest may     trick the L0 guest into accessing sensitive L1     resources that should be inaccessible to the L2     guest.(CVE-2020-2732)In the Linux kernel before 5.3.11,     sound/core/timer.c has a use-after-free caused by     erroneous code refactoring, aka CID-e7af6307a8a5. This     is related to snd_timer_open and     snd_timer_close_locked. The timeri variable was     originally intended to be for a newly created timer     instance, but was used for a different purpose after     refactoring.(CVE-2019-19807)In the Linux kernel     5.4.0-rc2, there is a use-after-free (read) in the
    __blk_add_trace function in kernel/trace/blktrace.c     (which is used to fill out a blk_io_trace structure and     place it in a per-cpu sub-buffer).(CVE-2019-19768)In     the Linux kernel 5.0.21, mounting a crafted f2fs     filesystem image can cause a NULL pointer dereference     in f2fs_recover_fsync_data in fs/f2fs/recovery.c. This     is related to F2FS_P_SB in     fs/f2fs/f2fs.h.(CVE-2019-19815)** DISPUTED **
    __btrfs_free_extent in fs/btrfs/extent-tree.c in the     Linux kernel through 5.3.12 calls btrfs_print_leaf in a     certain ENOENT case, which allows local users to obtain     potentially sensitive information about register values     via the dmesg program. NOTE: The BTRFS development team     disputes this issues as not being a vulnerability     because '1) The kernel provide facilities to restrict     access to dmesg - dmesg_restrict=1 sysctl option. So     it's really up to the system administrator to judge     whether dmesg access shall be disallowed or not. 2)     WARN/WARN_ON are widely used macros in the linux     kernel. If this CVE is considered valid this would mean     there are literally thousands CVE lurking in the kernel
    - something which clearly is not the     case.'(CVE-2019-19039)ext4_empty_dir in fs/ext4amei.c     in the Linux kernel through 5.3.12 allows a NULL     pointer dereference because     ext4_read_dirblock(inode,0,DIRENT_HTREE) can be     zero.(CVE-2019-19037)btrfs_root_node in     fs/btrfs/ctree.c in the Linux kernel through 5.3.12     allows a NULL pointer dereference because     rcu_dereference(root->node) can be     zero.(CVE-2019-19036)In the Linux kernel 4.19.83, there     is a use-after-free (read) in the debugfs_remove     function in fs/debugfs/inode.c (which is used to remove     a file or directory in debugfs that was previously     created with a call to another debugfs function such as     debugfs_create_file).(CVE-2019-19770)An issue was     discovered in slc_bump in driverset/can/slcan.c in the     Linux kernel through 5.6.2. It allows attackers to read     uninitialized can_frame data, potentially containing     sensitive information from kernel stack memory, if the     configuration lacks CONFIG_INIT_STACK_ALL, aka     CID-b9258a2cece4.(CVE-2020-11494)An issue was     discovered in the Linux kernel through 5.6.2.
    mpol_parse_str in mm/mempolicy.c has a stack-based     out-of-bounds write because an empty nodelist is     mishandled during mount option parsing, aka     CID-aa9f7d5172fa.(CVE-2020-11565)A flaw was found in     the Linux kernel's implementation of some networking     protocols in IPsec, such as VXLAN and GENEVE tunnels     over IPv6. When an encrypted tunnel is created between     two hosts, the kernel isn't correctly routing tunneled     data over the encrypted link rather sending the data     unencrypted. This would allow anyone in between the two     endpoints to read the traffic unencrypted. The main     threat from this vulnerability is to data     confidentiality.(CVE-2020-1749)An issue was discovered     in the stv06xx subsystem in the Linux kernel before     5.6.1. drivers/media/usb/gspca/stv06xx/stv06xx.c and     drivers/media/usb/gspca/stv06xx/stv06xx_pb0100.c     mishandle invalid descriptors, as demonstrated by a     NULL pointer dereference, aka     CID-485b06aadb93.(CVE-2020-11609)An issue was     discovered in the Linux kernel before 5.6.1.
    drivers/media/usb/gspca/ov519.c allows NULL pointer     dereferences in ov511_mode_init_regs and     ov518_mode_init_regs when there are zero endpoints, aka     CID-998912346c0d.(CVE-2020-11608)In the Linux kernel     before 5.4.12, drivers/input/input.c has out-of-bounds     writes via a crafted keycode table, as demonstrated by     input_set_keycode, aka     CID-cb222aed03d7.(CVE-2019-20636)In the Linux kernel     before 5.6.1, drivers/media/usb/gspca/xirlink_cit.c     (aka the Xirlink camera USB driver) mishandles invalid     descriptors, aka CID-a246b4d54770.(CVE-2020-11668)An     issue was discovered in the Linux kernel through 5.6.2.
    mpol_parse_str in mm/mempolicy.c has a stack-based     out-of-bounds write because an empty nodelist is     mishandled during mount option parsing, aka     CID-aa9f7d5172fa.(CVE-2020-0067)An issue was discovered     in the Linux kernel before 5.2 on the powerpc platform.
    arch/powerpc/kernel/idle_book3s.S does not have     save/restore functionality for PNV_POWERSAVE_AMR,     PNV_POWERSAVE_UAMOR, and PNV_POWERSAVE_AMOR, aka     CID-53a712bae5dd.(CVE-2020-11669)A flaw was found in     the Linux kernelaEUR?s implementation of GRO. This flaw     allows an attacker with local access to crash the     system.(CVE-2020-10720)A flaw was found in the Linux     kernel's implementation of the invert video code on VGA     consoles when a local attacker attempts to resize the     console, calling an ioctl VT_RESIZE, which causes an     out-of-bounds write to occur. This flaw allows a local     user with access to the VGA console to crash the     system, potentially escalating their privileges on the     system. The highest threat from this vulnerability is     to data confidentiality and integrity as well as system     availability.(CVE-2020-14331)An out-of-bounds (OOB)     memory access flaw was found in ttm_put_pages in     drivers/gpu/drm/ttm/ttm_page_alloc.c in the Linux     kernel's graphics module. Incrementing the page pointer     for huge pages was not in sync with the reference     counter, and this could lead to an out-of-bounds access     or a denial of service. This flaw allows a local     attacker with special user privileges (or root) to     cause memory exploitation.(CVE-2019-19927)

Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

According to the versions of the kernel packages installed, the EulerOS Virtualization for ARM 64 installation on the remote host is affected by the following vulnerabilities :

  - A heap-based buffer overflow was discovered in the     Linux kernel's Marvell WiFi chip driver. The flaw could     occur when the station attempts a connection     negotiation during the handling of the remote devices     country settings. This could allow the remote device to     cause a denial of service (system crash) or possibly     execute arbitrary code.(CVE-2019-14895)

  - A flaw was found in the fix for CVE-2019-11135, the way     Intel CPUs handle speculative execution of instructions     when a TSX Asynchronous Abort (TAA) error occurs. When     a guest is running on a host CPU affected by the TAA     flaw (TAA_NO=0), but is not affected by the MDS issue     (MDS_NO=1), the guest was to clear the affected buffers     by using a VERW instruction mechanism. But when the     MDS_NO=1 bit was exported to the guests, the guests did     not use the VERW mechanism to clear the affected     buffers. This issue affects guests running on Cascade     Lake CPUs and requires that host has 'TSX' enabled.
    Confidentiality of data is the highest threat     associated with this vulnerability.(CVE-2019-19338)

  - A flaw was found in the way Intel CPUs handle     speculative execution of instructions when the TSX     Asynchronous Abort (TAA) error occurs. A local     authenticated attacker with the ability to monitor     execution times could infer the TSX memory state by     comparing abort execution times. This could allow     information disclosure via this observed side-channel     for any TSX transaction being executed while an     attacker is able to observe abort timing. Intel's     Transactional Synchronisation Extensions (TSX) are set     of instructions which enable transactional memory     support to improve performance of the multi-threaded     applications, in the lock-protected critical sections.
    The CPU executes instructions in the critical-sections     as transactions, while ensuring their atomic state.
    When such transaction execution is unsuccessful, the     processor cannot ensure atomic updates to the     transaction memory, so the processor rolls back or     aborts such transaction execution. While TSX     Asynchronous Abort (TAA) is pending, CPU may continue     to read data from architectural buffers and pass it to     the dependent speculative operations. This may cause     information leakage via speculative side-channel means,     which is quite similar to the Microarchitectural Data     Sampling (MDS) issue.(CVE-2019-11135)

  - An out-of-bounds memory write issue was found in the     way the Linux kernel's KVM hypervisor handled the     'KVM_GET_EMULATED_CPUID' ioctl(2) request to get CPUID     features emulated by the KVM hypervisor. A user or     process able to access the '/dev/kvm' device could use     this flaw to crash the system, resulting in a denial of     service.(CVE-2019-19332)

  - A flaw was found in the Linux kernel's scheduler, where     it can allow attackers to cause a denial of service     against non-CPU-bound applications by generating a     workload that triggers unwanted scheduling slice     expiration. A local attacker who can trigger a specific     workload type could abuse this technique to trigger a     system to be seen as degraded, and possibly trigger     workload-rebalance in systems that use the     slice-expiration metric as a measure of system     health.(CVE-2019-19922)

  - A stack-based buffer overflow was found in the Linux     kernel's Marvell WiFi chip driver. An attacker is able     to cause a denial of service (system crash) or,     possibly execute arbitrary code, when a STA works in     IBSS mode (allows connecting stations together without     the use of an AP) and connects to another     STA.(CVE-2019-14897)

  - A heap-based buffer overflow vulnerability was found in     the Linux kernel's Marvell WiFi chip driver. A remote     attacker could cause a denial of service (system crash)     or, possibly execute arbitrary code, when the     lbs_ibss_join_existing function is called after a STA     connects to an AP.(CVE-2019-14896)

  - A flaw was found in the Linux kernel in versions     through 5.4.6, containing information leaks of     uninitialized memory to a USB device. The latest     findings show that the uninitialized memory allocation     was not leading to an information leak, but was     allocating the memory assigned with data on the next     line and hence causing no violation..(CVE-2019-19947)

  - A flaw was found in the Linux kernel's implementation     of the Datagram Congestion Control Protocol (DCCP). A     local attacker with access to the system can create     DCCP sockets to cause a memory leak and repeat this     operation to exhaust all memory and panic the     system.(CVE-2019-20096)

  - A flaw was found in the Linux kernel's mwifiex driver     implementation when connecting to other WiFi devices in     'Test Mode.' A kernel memory leak can occur if an error     condition is met during the parameter negotiation. This     issue can lead to a denial of service if multiple error     conditions meeting the repeated connection attempts are     attempted.(CVE-2019-20095)

  - A flaw was found in the Linux kernel's implementation     of the WiFi station handoff code. An attacker within     the radio range could use this flaw to deny a valid     device from joining the access point.(CVE-2019-5108)

  - A flaw was found in the way Linux kernel's KVM     hypervisor handled deferred TLB flush requests from     guest. A race condition may occur between the guest     issuing a deferred TLB flush request to KVM, and then     KVM handling and acknowledging it. This may result in     invalid address translations from TLB being used to     access guest memory, leading to a potential information     leakage issue. An attacker may use this flaw to access     guest memory locations that it should not have access     to.(CVE-2019-3016)

  - fs/namei.c in the Linux kernel before 5.5 has a     may_create_in_sticky use-after-free, which allows local     users to cause a denial of service (OOPS) or possibly     obtain sensitive information from kernel memory, aka     CID-d0cb50185ae9. One attack vector may be an open     system call for a UNIX domain socket, if the socket is     being moved to a new parent directory and its old     parent directory is being removed.(CVE-2020-8428)

  - There is a use-after-free vulnerability in the Linux     kernel through 5.5.2 in the n_tty_receive_buf_common     function in drivers/tty/n_tty.c.(CVE-2020-8648)

  - An issue was discovered in the Linux kernel through     5.5.6. set_fdc in drivers/block/floppy.c leads to a     wait_til_ready out-of-bounds read because the FDC index     is not checked for errors before assigning it, aka     CID-2e90ca68b0d2.(CVE-2020-9383)

  - There is a use-after-free vulnerability in the Linux     kernel through 5.5.2 in the vgacon_invert_region     function in     drivers/video/console/vgacon.c.(CVE-2020-8649)

  - There is a use-after-free vulnerability in the Linux     kernel through 5.5.2 in the vc_do_resize function in     drivers/tty/vt/vt.c.(CVE-2020-8647)

Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

According to the versions of the kernel packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities :

  - In the Linux kernel 5.0.21, mounting a crafted ext4     filesystem image, performing some operations, and     unmounting can lead to a use-after-free in     ext4_put_super in fs/ext4/super.c, related to     dump_orphan_list in fs/ext4/super.c.(CVE-2019-19447 )

  - In the Linux kernel 5.4.0-rc2, there is a     use-after-free (read) in the __blk_add_trace function     in kernel/trace/blktrace.c (which is used to fill out a     blk_io_trace structure and place it in a per-cpu     sub-buffer).(CVE-2019-19768)

  - ext4_protect_reserved_inode in fs/ext4/block_validity.c     in the Linux kernel through 5.5.3 allows attackers to     cause a denial of service (soft lockup) via a crafted     journal size.(CVE-2020-8992)

  - An issue was discovered in the Linux kernel through     5.5.6. set_fdc in drivers/block/floppy.c leads to a     wait_til_ready out-of-bounds read because the FDC index     is not checked for errors before assigning it, aka     CID-2e90ca68b0d2.(CVE-2020-9383)

  - In the Linux kernel before 5.3.11, sound/core/timer.c     has a use-after-free caused by erroneous code     refactoring, aka CID-e7af6307a8a5. This is related to     snd_timer_open and snd_timer_close_locked. The timeri     variable was originally intended to be for a newly     created timer instance, but was used for a different     purpose after refactoring.(CVE-2019-19807)

  - Kernel: kvm: nVMX: L2 guest may trick the L0 hypervisor     to access sensitive L1 resources(CVE-2020-2732)

  - There is a use-after-free vulnerability in the Linux     kernel through 5.5.2 in the n_tty_receive_buf_common     function in drivers/tty/n_tty.c.(CVE-2020-8648)

  - There is a use-after-free vulnerability in the Linux     kernel through 5.5.2 in the vgacon_invert_region     function in     drivers/video/console/vgacon.c.(CVE-2020-8649)

  - There is a use-after-free vulnerability in the Linux     kernel through 5.5.2 in the vc_do_resize function in     drivers/tty/vt/vt.c.(CVE-2020-8647)

  - fs/namei.c in the Linux kernel before 5.5 has a     may_create_in_sticky use-after-free, which allows local     users to cause a denial of service (OOPS) or possibly     obtain sensitive information from kernel memory, aka     CID-d0cb50185ae9. One attack vector may be an open     system call for a UNIX domain socket, if the socket is     being moved to a new parent directory and its old     parent directory is being removed.(CVE-2020-8428)

  - In a Linux KVM guest that has PV TLB enabled, a process     in the guest kernel may be able to read memory     locations from another process in the same guest. This     problem is limit to the host running linux kernel 4.10     with a guest running linux kernel 4.16 or later. The     problem mainly affects AMD processors but Intel CPUs     cannot be ruled out.(CVE-2019-3016)

Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

The remote Ubuntu 18.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-4301-1 advisory.

  - A memory leak in the rpmsg_eptdev_write_iter() function in drivers/rpmsg/rpmsg_char.c in the Linux kernel     through 5.3.11 allows attackers to cause a denial of service (memory consumption) by triggering     copy_from_iter_full() failures, aka CID-bbe692e349e2. (CVE-2019-19053)

  - A memory leak in the mwifiex_pcie_alloc_cmdrsp_buf() function in     drivers/net/wireless/marvell/mwifiex/pcie.c in the Linux kernel through 5.3.11 allows attackers to cause a     denial of service (memory consumption) by triggering mwifiex_map_pci_memory() failures, aka CID-     db8fd2cde932. (CVE-2019-19056)

  - A memory leak in the alloc_sgtable() function in drivers/net/wireless/intel/iwlwifi/fw/dbg.c in the Linux     kernel through 5.3.11 allows attackers to cause a denial of service (memory consumption) by triggering     alloc_page() failures, aka CID-b4b814fec1a5. (CVE-2019-19058)

  - Multiple memory leaks in the iwl_pcie_ctxt_info_gen3_init() function in     drivers/net/wireless/intel/iwlwifi/pcie/ctxt-info-gen3.c in the Linux kernel through 5.3.11 allow     attackers to cause a denial of service (memory consumption) by triggering iwl_pcie_init_fw_sec() or     dma_alloc_coherent() failures, aka CID-0f4f199443fa. (CVE-2019-19059)

  - A memory leak in the bfad_im_get_stats() function in drivers/scsi/bfa/bfad_attr.c in the Linux kernel     through 5.3.11 allows attackers to cause a denial of service (memory consumption) by triggering     bfa_port_get_stats() failures, aka CID-0e62395da2bd. (CVE-2019-19066)

  - A memory leak in the rtl8xxxu_submit_int_urb() function in     drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_core.c in the Linux kernel through 5.3.11 allows attackers     to cause a denial of service (memory consumption) by triggering usb_submit_urb() failures, aka     CID-a2cdd07488e6. (CVE-2019-19068)

  - In a Linux KVM guest that has PV TLB enabled, a process in the guest kernel may be able to read memory     locations from another process in the same guest. This problem is limit to the host running linux kernel     4.10 with a guest running linux kernel 4.16 or later. The problem mainly affects AMD processors but Intel     CPUs cannot be ruled out. (CVE-2019-3016)

  - A flaw was discovered in the way that the KVM hypervisor handled instruction emulation for an L2 guest     when nested virtualisation is enabled. Under some circumstances, an L2 guest may trick the L0 guest into     accessing sensitive L1 resources that should be inaccessible to the L2 guest. (CVE-2020-2732)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Ubuntu 18.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-4300-1 advisory.

  - A memory leak in the af9005_identify_state() function in drivers/media/usb/dvb-usb/af9005.c in the Linux     kernel through 5.3.9 allows attackers to cause a denial of service (memory consumption), aka     CID-2289adbfa559. (CVE-2019-18809)

  - A memory leak in the i40e_setup_macvlans() function in drivers/net/ethernet/intel/i40e/i40e_main.c in the     Linux kernel through 5.3.11 allows attackers to cause a denial of service (memory consumption) by     triggering i40e_setup_channel() failures, aka CID-27d461333459. (CVE-2019-19043)

  - A memory leak in the rpmsg_eptdev_write_iter() function in drivers/rpmsg/rpmsg_char.c in the Linux kernel     through 5.3.11 allows attackers to cause a denial of service (memory consumption) by triggering     copy_from_iter_full() failures, aka CID-bbe692e349e2. (CVE-2019-19053)

  - A memory leak in the mwifiex_pcie_alloc_cmdrsp_buf() function in     drivers/net/wireless/marvell/mwifiex/pcie.c in the Linux kernel through 5.3.11 allows attackers to cause a     denial of service (memory consumption) by triggering mwifiex_map_pci_memory() failures, aka CID-     db8fd2cde932. (CVE-2019-19056)

  - A memory leak in the alloc_sgtable() function in drivers/net/wireless/intel/iwlwifi/fw/dbg.c in the Linux     kernel through 5.3.11 allows attackers to cause a denial of service (memory consumption) by triggering     alloc_page() failures, aka CID-b4b814fec1a5. (CVE-2019-19058)

  - Multiple memory leaks in the iwl_pcie_ctxt_info_gen3_init() function in     drivers/net/wireless/intel/iwlwifi/pcie/ctxt-info-gen3.c in the Linux kernel through 5.3.11 allow     attackers to cause a denial of service (memory consumption) by triggering iwl_pcie_init_fw_sec() or     dma_alloc_coherent() failures, aka CID-0f4f199443fa. (CVE-2019-19059)

  - A memory leak in the fsl_lpspi_probe() function in drivers/spi/spi-fsl-lpspi.c in the Linux kernel through     5.3.11 allows attackers to cause a denial of service (memory consumption) by triggering     pm_runtime_get_sync() failures, aka CID-057b8945f78f. NOTE: third parties dispute the relevance of this     because an attacker cannot realistically control these failures at probe time (CVE-2019-19064)

  - A memory leak in the bfad_im_get_stats() function in drivers/scsi/bfa/bfad_attr.c in the Linux kernel     through 5.3.11 allows attackers to cause a denial of service (memory consumption) by triggering     bfa_port_get_stats() failures, aka CID-0e62395da2bd. (CVE-2019-19066)

  - A memory leak in the rtl8xxxu_submit_int_urb() function in     drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_core.c in the Linux kernel through 5.3.11 allows attackers     to cause a denial of service (memory consumption) by triggering usb_submit_urb() failures, aka     CID-a2cdd07488e6. (CVE-2019-19068)

  - In a Linux KVM guest that has PV TLB enabled, a process in the guest kernel may be able to read memory     locations from another process in the same guest. This problem is limit to the host running linux kernel     4.10 with a guest running linux kernel 4.16 or later. The problem mainly affects AMD processors but Intel     CPUs cannot be ruled out. (CVE-2019-3016)

  - A flaw was discovered in the way that the KVM hypervisor handled instruction emulation for an L2 guest     when nested virtualisation is enabled. Under some circumstances, an L2 guest may trick the L0 guest into     accessing sensitive L1 resources that should be inaccessible to the L2 guest. (CVE-2020-2732)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Oracle Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2020-5526 advisory.

  - An issue was discovered in the Linux kernel before 5.0.5. There is a use-after-free issue when     hci_uart_register_dev() fails in hci_uart_set_proto() in drivers/bluetooth/hci_ldisc.c. (CVE-2019-15917)

  - In a Linux KVM guest that has PV TLB enabled, a process in the guest kernel may be able to read memory     locations from another process in the same guest. This problem is limit to the host running linux kernel     4.10 with a guest running linux kernel 4.16 or later. The problem mainly affects AMD processors but Intel     CPUs cannot be ruled out. (CVE-2019-3016)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

ID	Name	Product	Family	Severity
180898	Oracle Linux 8 : kernel (ELSA-2020-3010)	Nessus	Oracle Linux Local Security Checks	high
139858	Amazon Linux 2 : kernel (ALAS-2020-1480)	Nessus	Amazon Linux Local Security Checks	medium
138807	RHEL 8 : kernel-rt (RHSA-2020:3016)	Nessus	Red Hat Local Security Checks	high
138805	RHEL 8 : kernel (RHSA-2020:3010)	Nessus	Red Hat Local Security Checks	high
137341	Debian DSA-4699-1 : linux - security update	Nessus	Debian Local Security Checks	high
136239	EulerOS Virtualization for ARM 64 3.0.2.0 : kernel (EulerOS-SA-2020-1536)	Nessus	Huawei Local Security Checks	critical
135129	EulerOS Virtualization for ARM 64 3.0.6.0 : kernel (EulerOS-SA-2020-1342)	Nessus	Huawei Local Security Checks	critical
134784	EulerOS 2.0 SP8 : kernel (EulerOS-SA-2020-1292)	Nessus	Huawei Local Security Checks	high
134659	Ubuntu 18.04 LTS : Linux kernel vulnerabilities (USN-4301-1)	Nessus	Ubuntu Local Security Checks	medium
134658	Ubuntu 18.04 LTS : Linux kernel vulnerabilities (USN-4300-1)	Nessus	Ubuntu Local Security Checks	medium
133381	Oracle Linux 7 : Unbreakable Enterprise kernel (ELSA-2020-5526)	Nessus	Oracle Linux Local Security Checks	medium

Detections

Analytics

CVE-2019-3016

medium

Tenable Plugins

high

medium

high

high

high

critical

critical

high

medium

medium

medium