According to the versions of the parallels-server-bm-release / vzkernel / etc packages installed, the Virtuozzo installation on the remote host is affected by the following vulnerabilities :

  - A new software page cache side channel attack scenario     was discovered in operating systems that implement the     very common 'page cache' caching mechanism. A malicious     user/process could use 'in memory' page-cache knowledge     to infer access timings to shared memory and gain     knowledge which can be used to reduce effectiveness of     cryptographic strength by monitoring algorithmic     behavior, infer access patterns of memory to determine     code paths taken, and exfiltrate data to a blinded     attacker through page-granularity access times as a     side-channel.

  - The Salsa20 encryption algorithm in the Linux kernel,     before 4.14.8, does not correctly handle zero-length     inputs. This allows a local attacker the ability to use     the AF_ALG-based skcipher interface to cause a denial     of service (uninitialized-memory free and kernel crash)     or have an unspecified other impact by executing a     crafted sequence of system calls that use the     blkcipher_walk API. Both the generic implementation     (crypto/salsa20_generic.c) and x86 implementation     (arch/x86/crypto/salsa20_glue.c) of Salsa20 are     vulnerable.

  - An issue was discovered in the proc_pid_stack function     in fs/proc/base.c in the Linux kernel. An attacker with     a local account can trick the stack unwinder code to     leak stack contents to userspace. The fix allows only     root to inspect the kernel stack of an arbitrary task.

  - A Spectre gadget was found in the Linux kernel's     implementation of system interrupts. An attacker with     local access could use this information to reveal     private data through a Spectre like side channel.

  - A flaw was found in the Linux kernel, prior to version     5.0.7, in drivers/scsi/megaraid/megaraid_sas_base.c,     where a NULL pointer dereference can occur when     megasas_create_frame_pool() fails in     megasas_alloc_cmds(). An attacker can crash the system     if they were able to load the megaraid_sas kernel     module and groom memory beforehand, leading to a denial     of service (DoS), related to a use-after-free.

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

An issue was discovered in the proc_pid_stack function in fs/proc/base.c in the Linux kernel. An attacker with a local account can trick the stack unwinder code to leak stack contents to userspace.
The fix allows only root to inspect the kernel stack of an arbitrary task.(CVE-2018-17972)

A vulnerability was discovered in the Linux kernel that allows an attacker to escalate privileges with using a 64-bit ARM architecture.
A local attacker with permission to create KVM-based virtual machines can both panic the hypervisor by triggering an illegal exception return (resulting in a DoS) and to redirect execution elsewhere within the hypervisor with full register control, instead of causing a return to the guest.(CVE-2018-18021)

The version of F5 Networks BIG-IP installed on the remote host is prior to 15.0.1.1 / 15.1.0. It is, therefore, affected by a vulnerability as referenced in the K27673650 advisory.

  - An issue was discovered in the proc_pid_stack function in fs/proc/base.c in the Linux kernel through     4.18.11. It does not ensure that only root may inspect the kernel stack of an arbitrary task, allowing a     local attacker to exploit racy stack unwinding and leak kernel task stack contents. (CVE-2018-17972)

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

The SUSE Linux Enterprise 12 SP2 kernel version 4.4.121 was updated to receive various security and bugfixes.

The following security bugs were fixed :

CVE-2019-11477: A sequence of SACKs may have been crafted by a remote attacker such that one can trigger an integer overflow, leading to a kernel panic. (bsc#1137586).

CVE-2019-11478: It was possible to send a crafted sequence of SACKs which would fragment the TCP retransmission queue. A remote attacker may have been able to further exploit the fragmented queue to cause an expensive linked-list walk for subsequent SACKs received for that same TCP connection.

CVE-2019-11479: It was possible to send a crafted sequence of SACKs which would fragment the RACK send map. A remote attacker may be able to further exploit the fragmented send map to cause an expensive linked-list walk for subsequent SACKs received for that same TCP connection. This would have resulted in excess resource consumption due to low mss values.

CVE-2019-3846: A flaw that allowed an attacker to corrupt memory and possibly escalate privileges was found in the mwifiex kernel module while connecting to a malicious wireless network. (bnc#1136424)

CVE-2019-12382: An issue was discovered in drm_load_edid_firmware in drivers/gpu/drm/drm_edid_load.c in the Linux kernel There is an unchecked kstrdup of fwstr, which may have allowed an attacker to cause a denial of service (NULL pointer dereference and system crash).
(bnc#1136586)

CVE-2019-5489: The mincore() implementation in mm/mincore.c in the Linux kernel allowed local attackers to observe page cache access patterns of other processes on the same system, potentially allowing sniffing of secret information. (Fixing this affects the output of the fincore program.) Limited remote exploitation may have been possible, as demonstrated by latency differences in accessing public files from an Apache HTTP Server. (bnc#1120843)

CVE-2019-11833: fs/ext4/extents.c in the Linux kernel did not zero out the unused memory region in the extent tree block, which might have allowed local users to obtain sensitive information by reading uninitialized data in the filesystem. (bnc#1135281)

CVE-2018-7191: In the tun subsystem in the Linux kernel, dev_get_valid_name was not called before register_netdevice. This allowed local users to cause a denial of service (NULL pointer dereference and panic) via an ioctl(TUNSETIFF) call with a dev name containing a / character. This is similar to CVE-2013-4343.
(bnc#1135603)

CVE-2019-11190: The Linux kernel allowed local users to bypass ASLR on setuid programs (such as /bin/su) because install_exec_creds() is called too late in load_elf_binary() in fs/binfmt_elf.c, and thus the ptrace_may_access() check had a race condition when reading /proc/pid/stat. (bnc#1131543)

CVE-2019-11815: An issue was discovered in rds_tcp_kill_sock in net/rds/tcp.c in the Linux kernel There was a race condition leading to a use-after-free, related to net namespace cleanup. (bnc#1134537)

CVE-2019-11884: The do_hidp_sock_ioctl function in net/bluetooth/hidp/sock.c in the Linux kernel allowed a local user to obtain potentially sensitive information from kernel stack memory via a HIDPCONNADD command, because a name field may not have ended with a '\0' character. (bnc#1134848)

CVE-2018-17972: An issue was discovered in the proc_pid_stack function in fs/proc/base.c in the Linux kernel It did not ensure that only root may inspect the kernel stack of an arbitrary task, allowing a local attacker to exploit racy stack unwinding and leak kernel task stack contents. (bnc#1110785)

The update package also includes non-security fixes. See advisory for details.

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

The remote NewStart CGSL host, running version CORE 5.04 / MAIN 5.04, has kernel-rt packages installed that are affected by multiple vulnerabilities:

  - Integer overflow in the aio_setup_single_vector function     in fs/aio.c in the Linux kernel 4.0 allows local users     to cause a denial of service or possibly have     unspecified other impact via a large AIO iovec. NOTE:
    this vulnerability exists because of a CVE-2012-6701     regression. (CVE-2015-8830)

  - A weakness was found in the Linux ASLR implementation.
    Any user able to running 32-bit applications in a x86     machine can disable ASLR by setting the RLIMIT_STACK     resource to unlimited. (CVE-2016-3672)

  - The xc2028_set_config function in     drivers/media/tuners/tuner-xc2028.c in the Linux kernel     before 4.6 allows local users to gain privileges or     cause a denial of service (use-after-free) via vectors     involving omission of the firmware name from a certain     data structure. Due to the nature of the flaw, privilege     escalation cannot be fully ruled out, although we     believe it is unlikely. (CVE-2016-7913)

  - Use-after-free vulnerability in the snd_pcm_info()     function in the ALSA subsystem in the Linux kernel     allows attackers to induce a kernel memory corruption     and possibly crash or lock up a system. Due to the     nature of the flaw, a privilege escalation cannot be     fully ruled out, although we believe it is unlikely.
    (CVE-2017-0861)

  - A reachable assertion failure flaw was found in the     Linux kernel built with KVM virtualisation(CONFIG_KVM)     support with Virtual Function I/O feature (CONFIG_VFIO)     enabled. This failure could occur if a malicious guest     device sent a virtual interrupt (guest IRQ) with a     larger (>1024) index value. (CVE-2017-1000252)

  - Linux kernel Virtualization Module (CONFIG_KVM) for the     Intel processor family (CONFIG_KVM_INTEL) is vulnerable     to a DoS issue. It could occur if a guest was to flood     the I/O port 0x80 with write requests. A guest user     could use this flaw to crash the host kernel resulting     in DoS. (CVE-2017-1000407)

  - A flaw was found in the processing of incoming L2CAP     bluetooth commands. Uninitialized stack variables can be     sent to an attacker leaking data in kernel address     space. (CVE-2017-1000410)

  - A race condition was found in the Linux kernel before     version 4.11-rc1 in 'fs/timerfd.c' file which allows a     local user to cause a kernel list corruption or use-     after-free via simultaneous operations with a file     descriptor which leverage improper 'might_cancel'     queuing. An unprivileged local user could use this flaw     to cause a denial of service of the system. Due to the     nature of the flaw, privilege escalation cannot be fully     ruled out, although we believe it is unlikely.
    (CVE-2017-10661)

  - Linux kernel built with the KVM visualization support     (CONFIG_KVM), with nested visualization (nVMX) feature     enabled (nested=1), is vulnerable to a crash due to     disabled external interrupts. As L2 guest could access     (r/w) hardware CR8 register of the host(L0). In a nested     visualization setup, L2 guest user could use this flaw     to potentially crash the host(L0) resulting in DoS.
    (CVE-2017-12154)

  - It was found that in the Linux kernel through v4.14-rc5,     bio_map_user_iov() and bio_unmap_user() in 'block/bio.c'     do unbalanced pages refcounting if IO vector has small     consecutive buffers belonging to the same page.
    bio_add_pc_page() merges them into one, but the page     reference is never dropped, causing a memory leak and     possible system lockup due to out-of-memory condition.
    (CVE-2017-12190)

  - A flaw was found in the Linux kernel's implementation of     valid_master_desc() in which a memory buffer would be     compared to a userspace value with an incorrect size of     comparison. By bruteforcing the comparison, an attacker     could determine what was in memory after the description     and possibly obtain sensitive information from kernel     memory. (CVE-2017-13305)

  - A use-after-free vulnerability was found in a network     namespaces code affecting the Linux kernel since     v4.0-rc1 through v4.15-rc5. The function     get_net_ns_by_id() does not check for the net::count     value after it has found a peer network in netns_ids idr     which could lead to double free and memory corruption.
    This vulnerability could allow an unprivileged local     user to induce kernel memory corruption on the system,     leading to a crash. Due to the nature of the flaw,     privilege escalation cannot be fully ruled out, although     it is thought to be unlikely. (CVE-2017-15129)

  - A use-after-free vulnerability was found when issuing an     ioctl to a sound device. This could allow a user to     exploit a race condition and create memory corruption or     possibly privilege escalation. (CVE-2017-15265)

  - A flaw was found in the implementation of associative     arrays where the add_key systemcall and KEYCTL_UPDATE     operations allowed for a NULL payload with a nonzero     length. When accessing the payload within this length     parameters value, an unprivileged user could trivially     cause a NULL pointer dereference (kernel oops).
    (CVE-2017-15274)

  - The net/netfilter/nfnetlink_cthelper.c function in the     Linux kernel through 4.14.4 does not require the     CAP_NET_ADMIN capability for new, get, and del     operations. This allows local users to bypass intended     access restrictions because the nfnl_cthelper_list data     structure is shared across all net namespaces.
    (CVE-2017-17448)

  - The __netlink_deliver_tap_skb function in     net/netlink/af_netlink.c in the Linux kernel, through     4.14.4, does not restrict observations of Netlink     messages to a single net namespace, when CONFIG_NLMON is     enabled. This allows local users to obtain sensitive     information by leveraging the CAP_NET_ADMIN capability     to sniff an nlmon interface for all Netlink activity on     the system. (CVE-2017-17449)

  - The usb_destroy_configuration() function, in     'drivers/usb/core/config.c' in the USB core subsystem,     in the Linux kernel through 4.14.5 does not consider the     maximum number of configurations and interfaces before     attempting to release resources. This allows local users     to cause a denial of service, due to out-of-bounds write     access, or possibly have unspecified other impact via a     crafted USB device. Due to the nature of the flaw,     privilege escalation cannot be fully ruled out, although     we believe it is unlikely. (CVE-2017-17558)

  - The Salsa20 encryption algorithm in the Linux kernel,     before 4.14.8, does not correctly handle zero-length     inputs. This allows a local attacker the ability to use     the AF_ALG-based skcipher interface to cause a denial of     service (uninitialized-memory free and kernel crash) or     have an unspecified other impact by executing a crafted     sequence of system calls that use the blkcipher_walk     API. Both the generic implementation     (crypto/salsa20_generic.c) and x86 implementation     (arch/x86/crypto/salsa20_glue.c) of Salsa20 are     vulnerable. (CVE-2017-17805)

  - The tcpmss_mangle_packet function in     net/netfilter/xt_TCPMSS.c in the Linux kernel before     4.11, and 4.9.x before 4.9.36, allows remote attackers     to cause a denial of service (use-after-free and memory     corruption) or possibly have unspecified other impact by     leveraging the presence of xt_TCPMSS in an iptables     action. Due to the nature of the flaw, privilege     escalation cannot be fully ruled out, although we     believe it is unlikely. (CVE-2017-18017)

  - The Linux kernel, before version 4.14.3, is vulnerable     to a denial of service in     drivers/md/dm.c:dm_get_from_kobject() which can be     caused by local users leveraging a race condition with
    __dm_destroy() during creation and removal of DM     devices. Only privileged local users (with CAP_SYS_ADMIN     capability) can directly perform the ioctl operations     for dm device creation and removal and this would     typically be outside the direct control of the     unprivileged attacker. (CVE-2017-18203)

  - The madvise_willneed function in the Linux kernel allows     local users to cause a denial of service (infinite loop)     by triggering use of MADVISE_WILLNEED for a DAX mapping.
    (CVE-2017-18208)

  - A flaw was found where the kernel truncated the value     used to indicate the size of a buffer which it would     later become zero using an untruncated value. This can     corrupt memory outside of the original allocation.
    (CVE-2017-9725)

  - In the Linux kernel versions 4.12, 3.10, 2.6, and     possibly earlier, a race condition vulnerability exists     in the sound system allowing for a potential deadlock     and memory corruption due to use-after-free condition     and thus denial of service. Due to the nature of the     flaw, privilege escalation cannot be fully ruled out,     although we believe it is unlikely. (CVE-2018-1000004)

  - Improper validation in the bnx2x network card driver of     the Linux kernel version 4.15 can allow for denial of     service (DoS) attacks via a packet with a gso_size     larger than ~9700 bytes. Untrusted guest VMs can exploit     this vulnerability in the host machine, causing a crash     in the network card. (CVE-2018-1000026)

  - By mmap()ing a FUSE-backed file onto a process's memory     containing command line arguments (or environment     strings), an attacker can cause utilities from psutils     or procps (such as ps, w) or any other program which     makes a read() call to the /proc//cmdline (or     /proc//environ) files to block indefinitely (denial     of service) or for some controlled time (as a     synchronization primitive for other attacks).
    (CVE-2018-1120)

  - A null pointer dereference in dccp_write_xmit() function     in net/dccp/output.c in the Linux kernel allows a local     user to cause a denial of service by a number of certain     crafted system calls. (CVE-2018-1130)

  - An issue was discovered in the proc_pid_stack function     in fs/proc/base.c in the Linux kernel. An attacker with     a local account can trick the stack unwinder code to     leak stack contents to userspace. The fix allows only     root to inspect the kernel stack of an arbitrary task.
    (CVE-2018-17972)

  - A flaw was found in the Linux kernel with files on tmpfs     and hugetlbfs. An attacker is able to bypass file     permissions on filesystems mounted with tmpfs/hugetlbs     to modify a file and possibly disrupt normal system     behavior. At this time there is an understanding there     is no crash or privilege escalation but the impact of     modifications on these filesystems of files in     production systems may have adverse affects.
    (CVE-2018-18397)

  - In the Linux kernel before 4.17, a local attacker able     to set attributes on an xfs filesystem could make this     filesystem non-operational until the next mount by     triggering an unchecked error condition during an xfs     attribute change, because xfs_attr_shortform_addname in     fs/xfs/libxfs/xfs_attr.c mishandles ATTR_REPLACE     operations with conversion of an attr from short to long     form. (CVE-2018-18690)

  - A flaw was found in the Linux kernel's handling of     loopback devices. An attacker, who has permissions to     setup loopback disks, may create a denial of service or     other unspecified actions. (CVE-2018-5344)

  - The acpi_smbus_hc_add function in drivers/acpi/sbshc.c     in the Linux kernel, through 4.14.15, allows local users     to obtain sensitive address information by reading dmesg     data from an SBS HC printk call. (CVE-2018-5750)

  - An error in the _sctp_make_chunk() function     (net/sctp/sm_make_chunk.c) when handling SCTP, packet     length can be exploited by a malicious local user to     cause a kernel crash and a DoS. (CVE-2018-5803)

  - In the function wmi_set_ie() in the Linux kernel the     length validation code does not handle unsigned integer     overflow properly. As a result, a large value of the     ie_len argument can cause a buffer overflow and thus a     memory corruption leading to a system crash or other or     unspecified impact. Due to the nature of the flaw,     privilege escalation cannot be fully ruled out, although     we believe it is unlikely. (CVE-2018-5848)

  - ALSA sequencer core initializes the event pool on demand     by invoking snd_seq_pool_init() when the first write     happens and the pool is empty. A user can reset the pool     size manually via ioctl concurrently, and this may lead     to UAF or out-of-bound access. (CVE-2018-7566)

  - A possible memory corruption due to a type confusion was     found in the Linux kernel in the sk_clone_lock()     function in the net/core/sock.c. The possibility of     local escalation of privileges cannot be fully ruled out     for a local unprivileged attacker. (CVE-2018-9568)

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 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2019:0514 advisory.

    The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with     extremely high determinism requirements.

    Security Fix(es):

    * kernel: Memory corruption due to incorrect socket cloning (CVE-2018-9568)

    * kernel: Unprivileged users able to inspect kernel stacks of arbitrary tasks (CVE-2018-17972)

    * kernel: Faulty computation of numberic bounds in the BPF verifier (CVE-2018-18445)

    For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and     other related information, refer to the CVE page(s) listed in the References section.

    Bug Fix(es):

    * kernel-rt: update to the RHEL7.6.z batch#3 source tree (BZ#1672406)

    Users of kernel-rt are advised to upgrade to these updated packages, which fix this bug.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

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

Security Fix(es) :

  - kernel: Memory corruption due to incorrect socket     cloning (CVE-2018-9568)

  - kernel: Unprivileged users able to inspect kernel stacks     of arbitrary tasks (CVE-2018-17972)

  - kernel: Faulty computation of numberic bounds in the BPF     verifier (CVE-2018-18445)

Bug Fix(es) and Enhancement(s) :

  - kernel fuse invalidates cached attributes during reads

  - [NetApp-FC-NVMe] SL7.6: nvme reset gets hung     indefinitely

  - Memory reclaim deadlock calling __sock_create() after     memalloc_noio_save()

  - hardened usercopy is causing crash

  - Backport: xfrm: policy: init locks early

  - AWS m5 instance type loses NVMe mounted volumes [was:
    Unable to Mount StatefulSet PV in AWS EBS]

  - SL 7.6 running on a VirtualBox guest with a GUI has a     mouse problem

  - Kernel bug report in cgroups on heavily contested 3.10     node

  - [PCIe] SHPC probe crash on Non-ACPI/Non-SHPC ports

  - [Cavium 7.7 Feat] qla2xxx: Update to latest upstream.

  - Regression in lpfc and the CNE1000 (BE2 FCoE) adapters     that no longer initialize

  - [csiostor] call trace after command: modprobe csiostor

  - libceph: fall back to sendmsg for slab pages

  - Deadlock between stop_one_cpu_nowait() and     stop_two_cpus()

  - Soft lockups occur when the sd driver passes a device     size of 1 sector to string_get_size()

  - [SL7.7] BUG: unable to handle kernel paging request at     ffffffffffffffff

  - SL7.6 - powerpc/pseries: Disable CPU hotplug across     migrations / powerpc/rtas: Fix a potential race between     CPU-Offline &amp; Migration (LPM)

  - blk-mq: fix corruption with direct issue

  - [SL7][patch] iscsi driver can block reboot/shutdown

  - [DELL EMC 7.6 BUG] Unable to create-namespace over Dell     NVDIMM-N

  - efi_bgrt_init fails to ioremap error during boot

  - Unable to mount a share on kernel- 3.10.0-957.el7. The     share can be mounted on kernel-3.10.0-862.14.4.el7

  - System crash with RIP nfs_readpage_async+0x43 -- BUG:
    unable to handle kernel NULL pointer dereference

ID	Name	Product	Family	Published	Updated	Severity
128032	Virtuozzo 6 : parallels-server-bm-release / vzkernel / etc (VZA-2019-067)	Nessus	Virtuozzo Local Security Checks	8/20/2019	1/4/2021	high
118832	Amazon Linux 2 : kernel (ALAS-2018-1100)	Nessus	Amazon Linux Local Security Checks	11/9/2018	7/24/2024	high
132562	F5 Networks BIG-IP : Linux kernel vulnerability (K27673650)	Nessus	F5 Networks Local Security Checks	12/31/2019	2/28/2024	medium
125995	SUSE SLES12 Security Update : kernel (SUSE-SU-2019:1534-1) (SACK Panic) (SACK Slowness)	Nessus	SuSE Local Security Checks	6/18/2019	5/15/2024	high
127281	NewStart CGSL CORE 5.04 / MAIN 5.04 : kernel-rt Multiple Vulnerabilities (NS-SA-2019-0074)	Nessus	NewStart CGSL Local Security Checks	8/12/2019	1/14/2021	critical
122843	RHEL 7 : kernel-rt (RHSA-2019:0514)	Nessus	Red Hat Local Security Checks	3/14/2019	11/6/2024	high
122887	Scientific Linux Security Update : kernel on SL7.x x86_64 (20190314)	Nessus	Scientific Linux Local Security Checks	3/18/2019	6/13/2024	high

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