Memory leak in the __key_link_end function in security/keys/keyring.c in the Linux kernel before 4.1.4 allows local users to cause a denial of service (memory consumption) via many add_key system calls that refer to existing keys.

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 atalk_recvmsg function in net/appletalk/ddp.c in     the Linux kernel before 3.12.4 updates a certain length     value without ensuring that an associated data     structure has been initialized, which allows local     users to obtain sensitive information from kernel     memory via a (1) recvfrom, (2) recvmmsg, or (3) recvmsg     system call.(CVE-2013-7267i1/4%0

  - fs/f2fs/segment.c in the Linux kernel allows local     users to cause a denial of service (NULL pointer     dereference and panic) by using a noflush_merge option     that triggers a NULL value for a flush_cmd_control data     structure.(CVE-2017-18241i1/4%0

  - fs/pnode.c in the Linux kernel before 4.5.4 does not     properly traverse a mount propagation tree in a certain     case involving a slave mount, which allows local users     to cause a denial of service (NULL pointer dereference     and OOPS) via a crafted series of mount system     calls.(CVE-2016-4581i1/4%0

  - drivers/vhost/net.c in the Linux kernel before 3.13.10,     when mergeable buffers are disabled, does not properly     validate packet lengths, which allows guest OS users to     cause a denial of service (memory corruption and host     OS crash) or possibly gain privileges on the host OS     via crafted packets, related to the handle_rx and     get_rx_bufs functions.(CVE-2014-0077i1/4%0

  - It was found that the fix for CVE-2016-9576 was     incomplete: the Linux kernel's sg implementation did     not properly restrict write operations in situations     where the KERNEL_DS option is set. A local attacker to     read or write to arbitrary kernel memory locations or     cause a denial of service (use-after-free) by     leveraging write access to a /dev/sg     device.(CVE-2016-10088i1/4%0

  - ** DISPUTED ** An issue was discovered in the Linux     kernel through 4.17.2. Since the page allocator does     not yield CPU resources to the owner of the oom_lock     mutex, a local unprivileged user can trivially lock up     the system forever by wasting CPU resources from the     page allocator (e.g., via concurrent page fault events)     when the global OOM killer is invoked. NOTE: the     software maintainer has not accepted certain proposed     patches, in part because of a viewpoint that 'the     underlying problem is non-trivial to     handle.'(CVE-2016-10723i1/4%0

  - A flaw was found in the way the Linux kernel's ASN.1     DER decoder processed certain certificate files with     tags of indefinite length. A local, unprivileged user     could use a specially crafted X.509 certificate DER     file to crash the system or, potentially, escalate     their privileges on the system.(CVE-2016-0758i1/4%0

  - A flaw was found in the way the Linux kernel's Stream     Control Transmission Protocol (SCTP) implementation     handled the association's output queue. A remote     attacker could send specially crafted packets that     would cause the system to use an excessive amount of     memory, leading to a denial of     service.(CVE-2014-3688i1/4%0

  - A use-after-free flaw was found in the way the     ping_init_sock() function of the Linux kernel handled     the group_info reference counter. A local, unprivileged     user could use this flaw to crash the system or,     potentially, escalate their privileges on the     system.(CVE-2014-2851i1/4%0

  - The compat_get_timex function in kernel/compat.c in the     Linux kernel before 4.16.9 allows local users to obtain     sensitive information from kernel memory via     adjtimex.(CVE-2018-11508i1/4%0

  - The cdc_parse_cdc_header() function in     'drivers/usb/core/message.c' in the Linux kernel,     before 4.13.6, allows local users to cause a denial of     service (out-of-bounds read and system crash) 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-2017-16534i1/4%0

  - A flaw was found in the crypto subsystem of the Linux     kernel before version kernel-4.15-rc4. The 'null     skcipher' was being dropped when each af_alg_ctx was     freed instead of when the aead_tfm was freed. This can     cause the null skcipher to be freed while it is still     in use leading to a local user being able to crash the     system or possibly escalate     privileges.(CVE-2018-14619i1/4%0

  - The crypto_skcipher_init_tfm function in     crypto/skcipher.c in the Linux kernel through 4.11.2     relies on a setkey function that lacks a key-size     check, which allows local users to cause a denial of     service (NULL pointer dereference) via a crafted     application.(CVE-2017-9211i1/4%0

  - kernel/events/core.c in the performance subsystem in     the Linux kernel before 4.0 mismanages locks during     certain migrations, which allows local users to gain     privileges via a crafted application, aka Android     internal bug 30955111.(CVE-2016-6786i1/4%0

  - The KEYS subsystem in the Linux kernel omitted an     access-control check when writing a key to the current     task's default keyring, allowing a local user to bypass     security checks to the keyring. This compromises the     validity of the keyring for those who rely on     it.(CVE-2017-17807i1/4%0

  - A use-after-free flaw was found in the way the Linux     kernel's SCTP implementation handled authentication key     reference counting during INIT collisions. A remote     attacker could use this flaw to crash the system or,     potentially, escalate their privileges on the     system.(CVE-2015-1421i1/4%0

  - The waitid implementation in kernel/exit.c in the Linux     kernel through 4.13.4 accesses rusage data structures     in unintended cases. This can allow local users to     obtain sensitive information and bypass the KASLR     protection mechanism via a crafted system     call.(CVE-2017-14954i1/4%0

  - It was found that the Linux kernel's keyring     implementation would leak memory when adding a key to a     keyring via the add_key() function. A local attacker     could use this flaw to exhaust all available memory on     the system.(CVE-2015-1333i1/4%0

  - The msm_ipc_router_close function in     net/ipc_router/ipc_router_socket.c in the ipc_router     component for the Linux kernel 3.x, as used in Qualcomm     Innovation Center (QuIC) Android contributions for MSM     devices and other products, allow attackers to cause a     denial of service (NULL pointer dereference) or     possibly have unspecified other impact by triggering     failure of an accept system call for an AF_MSM_IPC     socket.(CVE-2016-5870i1/4%0

  - 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 (i1/4z1024) index value.(CVE-2017-1000252i1/4%0

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 installation on the remote host is affected by the following vulnerabilities :

  - A flaw was found in the way the Linux kernel's Crypto     subsystem handled automatic loading of kernel modules.
    A local user could use this flaw to load any installed     kernel module, and thus increase the attack surface of     the running kernel.(CVE-2014-9644)

  - The Btrfs implementation in the Linux kernel before     3.19 does not ensure that the visible xattr state is     consistent with a requested replacement, which allows     local users to bypass intended ACL settings and gain     privileges via standard filesystem operations (1)     during an xattr-replacement time window, related to a     race condition, or (2) after an xattr-replacement     attempt that fails because the data does not     fit.(CVE-2014-9710)

  - An integer overflow flaw was found in the way the Linux     kernel's netfilter connection tracking implementation     loaded extensions. An attacker on a local network could     potentially send a sequence of specially crafted     packets that would initiate the loading of a large     number of extensions, causing the targeted system in     that network to crash.(CVE-2014-9715)

  - A symlink size validation was missing in Linux kernels     built with UDF file system (CONFIG_UDF_FS) support,     allowing the corruption of kernel memory. An attacker     able to mount a corrupted/malicious UDF file system     image could cause the kernel to crash.(CVE-2014-9728)

  - A symlink size validation was missing in Linux kernels     built with UDF file system (CONFIG_UDF_FS) support,     allowing the corruption of kernel memory. An attacker     able to mount a corrupted/malicious UDF file system     image could cause the kernel to crash.(CVE-2014-9729)

  - A symlink size validation was missing in Linux kernels     built with UDF file system (CONFIG_UDF_FS) support,     allowing the corruption of kernel memory. An attacker     able to mount a corrupted/malicious UDF file system     image could cause the kernel to crash.(CVE-2014-9730)

  - A path length checking flaw was found in Linux kernels     built with UDF file system (CONFIG_UDF_FS) support. An     attacker able to mount a corrupted/malicious UDF file     system image could use this flaw to leak kernel memory     to user-space.(CVE-2014-9731)

  - The snd_compr_tstamp function in     sound/core/compress_offload.c in the Linux kernel     through 4.7, as used in Android before 2016-08-05 on     Nexus 5 and 7 (2013) devices, does not properly     initialize a timestamp data structure, which allows     attackers to obtain sensitive information via a crafted     application, aka Android internal bug 28770164 and     Qualcomm internal bug CR568717.(CVE-2014-9892)

  - drivers/media/media-device.c in the Linux kernel before     3.11, as used in Android before 2016-08-05 on Nexus 5     and 7 (2013) devices, does not properly initialize     certain data structures, which allows local users to     obtain sensitive information via a crafted application,     aka Android internal bug 28750150 and Qualcomm internal     bug CR570757, a different vulnerability than     CVE-2014-1739.(CVE-2014-9895)

  - The ethtool_get_wol function in net/core/ethtool.c in     the Linux kernel through 4.7, as used in Android before     2016-08-05 on Nexus 5 and 7 (2013) devices, does not     initialize a certain data structure, which allows local     users to obtain sensitive information via a crafted     application, aka Android internal bug 28803952 and     Qualcomm internal bug CR570754.(CVE-2014-9900)

  - The snd_compress_check_input function in     sound/core/compress_offload.c in the ALSA subsystem in     the Linux kernel before 3.17 does not properly check     for an integer overflow, which allows local users to     cause a denial of service (insufficient memory     allocation) or possibly have unspecified other impact     via a crafted SNDRV_COMPRESS_SET_PARAMS ioctl     call.(CVE-2014-9904)

  - A race condition in the ip4_datagram_release_cb     function in net/ipv4/datagram.c in the Linux kernel     allows local users to gain privileges or cause a denial     of service (use-after-free) by leveraging incorrect     expectations about locking during multithreaded access     to internal data structures for IPv4 UDP     sockets.(CVE-2014-9914)

  - A flaw was discovered in the way the kernel allows     stackable filesystems to overlay. A local attacker who     is able to mount filesystems can abuse this flaw to     escalate privileges.(CVE-2014-9922)

  - The regulator_ena_gpio_free function in     drivers/regulator/core.c in the Linux kernel allows     local users to gain privileges or cause a denial of     service (use-after-free) via a crafted     application.(CVE-2014-9940)

  - It was found that the Linux kernel KVM subsystem's     sysenter instruction emulation was not sufficient. An     unprivileged guest user could use this flaw to escalate     their privileges by tricking the hypervisor to emulate     a SYSENTER instruction in 16-bit mode, if the guest OS     did not initialize the SYSENTER model-specific     registers (MSRs). Note: Certified guest operating     systems for Red Hat Enterprise Linux with KVM do     initialize the SYSENTER MSRs and are thus not     vulnerable to this issue when running on a KVM     hypervisor.(CVE-2015-0239)

  - A flaw was found in the way the Linux kernel's XFS file     system handled replacing of remote attributes under     certain conditions. A local user with access to XFS     file system mount could potentially use this flaw to     escalate their privileges on the system.(CVE-2015-0274)

  - A flaw was found in the way the Linux kernel's ext4     file system handled the 'page size i1/4z block size'     condition when the fallocate zero range functionality     was used. A local attacker could use this flaw to crash     the system.(CVE-2015-0275)

  - It was found that the Linux kernel's keyring     implementation would leak memory when adding a key to a     keyring via the add_key() function. A local attacker     could use this flaw to exhaust all available memory on     the system.(CVE-2015-1333)

  - Race condition in the handle_to_path function in     fs/fhandle.c in the Linux kernel through 3.19.1 allows     local users to bypass intended size restrictions and     trigger read operations on additional memory locations     by changing the handle_bytes value of a file handle     during the execution of this function.(CVE-2015-1420)

  - A use-after-free flaw was found in the way the Linux     kernel's SCTP implementation handled authentication key     reference counting during INIT collisions. A remote     attacker could use this flaw to crash the system or,     potentially, escalate their privileges on the     system.(CVE-2015-1421)

  - The IPv4 implementation in the Linux kernel before     3.18.8 does not properly consider the length of the     Read-Copy Update (RCU) grace period for redirecting     lookups in the absence of caching, which allows remote     attackers to cause a denial of service (memory     consumption or system crash) via a flood of     packets.(CVE-2015-1465)

  - A flaw was found in the way the nft_flush_table()     function of the Linux kernel's netfilter tables     implementation flushed rules that were referencing     deleted chains. A local user who has the CAP_NET_ADMIN     capability could use this flaw to crash the     system.(CVE-2015-1573)

  - An integer overflow flaw was found in the way the Linux     kernel randomized the stack for processes on certain     64-bit architecture systems, such as x86-64, causing     the stack entropy to be reduced by four.(CVE-2015-1593)

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 OracleVM system is missing necessary patches to address critical security updates : please see Oracle VM Security Advisory OVMSA-2017-0057 for details.

The remote OracleVM system is missing necessary patches to address critical security updates : please see Oracle VM Security Advisory OVMSA-2015-0147 for details.

The remote Oracle Linux 6 / 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2015-3098 advisory.

  - The implementation of certain splice_write file operations in the Linux kernel before 3.16 does not     enforce a restriction on the maximum size of a single file, which allows local users to cause a denial of     service (system crash) or possibly have unspecified other impact via a crafted splice system call, as     demonstrated by use of a file descriptor associated with an ext4 filesystem. (CVE-2014-7822)

  - The (1) pipe_read and (2) pipe_write implementations in fs/pipe.c in the Linux kernel before 3.16 do not     properly consider the side effects of failed __copy_to_user_inatomic and __copy_from_user_inatomic calls,     which allows local users to cause a denial of service (system crash) or possibly gain privileges via a     crafted application, aka an I/O vector array overrun. (CVE-2015-1805)

  - The __rds_conn_create function in net/rds/connection.c in the Linux kernel through 4.2.3 allows local     users to cause a denial of service (NULL pointer dereference and system crash) or possibly have     unspecified other impact by using a socket that was not properly bound. (CVE-2015-6937)

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

Updated kernel packages that fix multiple security issues and several bugs are now available for Red Hat Enterprise Linux 7.

Red Hat Product Security has rated this update as having Important security impact. Common Vulnerability Scoring System (CVSS) base scores, which give detailed severity ratings, are available for each vulnerability from the CVE links in the References section.

The kernel packages contain the Linux kernel, the core of any Linux operating system.

* A flaw was found in the kernel's implementation of the Berkeley Packet Filter (BPF). A local attacker could craft BPF code to crash the system by creating a situation in which the JIT compiler would fail to correctly optimize the JIT image on the last pass. This would lead to the CPU executing instructions that were not part of the JIT code. (CVE-2015-4700, Important)

* Two flaws were found in the way the Linux kernel's networking implementation handled UDP packets with incorrect checksum values. A remote attacker could potentially use these flaws to trigger an infinite loop in the kernel, resulting in a denial of service on the system, or cause a denial of service in applications using the edge triggered epoll functionality. (CVE-2015-5364, CVE-2015-5366, Important)

* A flaw was found in the way the Linux kernel's ext4 file system handled the 'page size > block size' condition when the fallocate zero range functionality was used. A local attacker could use this flaw to crash the system. (CVE-2015-0275, Moderate)

* It was found that the Linux kernel's keyring implementation would leak memory when adding a key to a keyring via the add_key() function.
A local attacker could use this flaw to exhaust all available memory on the system. (CVE-2015-1333, Moderate)

* A race condition flaw was found in the way the Linux kernel's SCTP implementation handled Address Configuration lists when performing Address Configuration Change (ASCONF). A local attacker could use this flaw to crash the system via a race condition triggered by setting certain ASCONF options on a socket. (CVE-2015-3212, Moderate)

* An information leak flaw was found in the way the Linux kernel's Virtual Dynamic Shared Object (vDSO) implementation performed address randomization. A local, unprivileged user could use this flaw to leak kernel memory addresses to user-space. (CVE-2014-9585, Low)

Red Hat would like to thank Daniel Borkmann for reporting CVE-2015-4700, and Canonical for reporting the CVE-2015-1333 issue.
The CVE-2015-0275 issue was discovered by Xiong Zhou of Red Hat, and the CVE-2015-3212 issue was discovered by Ji Jianwen of Red Hat Engineering.

This update also fixes several bugs. Refer to the following Knowledgebase article for further information :

https://access.redhat.com/articles/1614563

All kernel users are advised to upgrade to these updated packages, which contain backported patches to correct these issues. The system must be rebooted for this update to take effect.

The openSUSE 13.2 kernel was updated to receive various security and bugfixes.

Following security bugs were fixed :

  - CVE-2015-3290: arch/x86/entry/entry_64.S in the Linux     kernel on the x86_64 platform improperly relied on     espfix64 during nested NMI processing, which allowed     local users to gain privileges by triggering an NMI     within a certain instruction window (bnc#937969)

  - CVE-2015-0272: It was reported that it's possible to     craft a Router Advertisement message which will bring     the receiver in a state where new IPv6 connections will     not be accepted until correct Router Advertisement     message received. (bsc#944296).

  - CVE-2015-5283: The sctp_init function in     net/sctp/protocol.c in the Linux kernel had an incorrect     sequence of protocol-initialization steps, which allowed     local users to cause a denial of service (panic or     memory corruption) by creating SCTP sockets before all     of the steps have finished (bnc#947155).

  - CVE-2015-1333: Memory leak in the __key_link_end     function in security/keys/keyring.c in the Linux kernel     allowed local users to cause a denial of service (memory     consumption) via many add_key system calls that refer to     existing keys. (bsc#938645)

  - CVE-2015-5707: Integer overflow in the sg_start_req     function in drivers/scsi/sg.c in the Linux kernel     allowed local users to cause a denial of service or     possibly have unspecified other impact via a large     iov_count value in a write request. (bsc#940338)

  - CVE-2015-2925: An attacker could potentially break out     of a namespace or container, depending on if he had     specific rights in these containers. (bsc#926238).

  - CVE-2015-7872: A vulnerability in keyrings garbage     collector allowed a local user to trigger an oops was     found, caused by using request_key() or keyctl request2.
    (bsc#951440)

The following non-security bugs were fixed :

  - input: evdev - do not report errors form flush()     (bsc#939834).

  - NFSv4: Recovery of recalled read delegations is broken     (bsc#942178).

  - apparmor: temporary work around for bug while unloading     policy (boo#941867).

  - config/x86_64/ec2: Align CONFIG_STRICT_DEVMEM     CONFIG_STRICT_DEVMEM is enabled in every other kernel     flavor, so enable it for x86_64/ec2 as well.

  - kernel-obs-build: add btrfs to initrd This is needed for     kiwi builds.

  - mmc: card: Do not access RPMB partitions for normal     read/write (bnc#941104).

  - netback: coalesce (guest) RX SKBs as needed     (bsc#919154).

  - rpm/kernel-obs-build.spec.in: Add virtio_rng to the     initrd. This allows to feed some randomness to the OBS     workers.

  - xfs: Fix file type directory corruption for btree     directories (bsc#941305).

  - xfs: ensure buffer types are set correctly (bsc#941305).

  - xfs: inode unlink does not set AGI buffer type     (bsc#941305).

  - xfs: set buf types when converting extent formats     (bsc#941305).

  - xfs: set superblock buffer type correctly (bsc#941305).

  - xhci: Add spurious wakeup quirk for LynxPoint-LP     controllers (bnc#951195).

Updated kernel-rt packages that fix multiple security issues, several bugs, and add various enhancements are now available for Red Hat Enterprise Linux 7.

Red Hat Product Security has rated this update as having Important security impact. Common Vulnerability Scoring System (CVSS) base scores, which give detailed severity ratings, are available for each vulnerability from the CVE links in the References section.

The kernel-rt packages contain the Linux kernel, the core of any Linux operating system.

* A flaw was found in the kernel's implementation of the Berkeley Packet Filter (BPF). A local attacker could craft BPF code to crash the system by creating a situation in which the JIT compiler would fail to correctly optimize the JIT image on the last pass. This would lead to the CPU executing instructions that were not part of the JIT code. (CVE-2015-4700, Important)

* Two flaws were found in the way the Linux kernel's networking implementation handled UDP packets with incorrect checksum values. A remote attacker could potentially use these flaws to trigger an infinite loop in the kernel, resulting in a denial of service on the system, or cause a denial of service in applications using the edge triggered epoll functionality. (CVE-2015-5364, CVE-2015-5366, Important)

* A flaw was found in the way the Linux kernel's ext4 file system handled the 'page size > block size' condition when the fallocate zero range functionality was used. A local attacker could use this flaw to crash the system. (CVE-2015-0275, Moderate)

* It was found that the Linux kernel's keyring implementation would leak memory when adding a key to a keyring via the add_key() function.
A local attacker could use this flaw to exhaust all available memory on the system. (CVE-2015-1333, Moderate)

* A race condition flaw was found in the way the Linux kernel's SCTP implementation handled Address Configuration lists when performing Address Configuration Change (ASCONF). A local attacker could use this flaw to crash the system via a race condition triggered by setting certain ASCONF options on a socket. (CVE-2015-3212, Moderate)

* An information leak flaw was found in the way the Linux kernel's Virtual Dynamic Shared Object (vDSO) implementation performed address randomization. A local, unprivileged user could use this flaw to leak kernel memory addresses to user-space. (CVE-2014-9585, Low)

Red Hat would like to thank Daniel Borkmann for reporting CVE-2015-4700, and Canonical for reporting the CVE-2015-1333 issue.
The CVE-2015-0275 issue was discovered by Xiong Zhou of Red Hat, and the CVE-2015-3212 issue was discovered by Ji Jianwen of Red Hat Engineering.

The kernel-rt packages have been upgraded to version 3.10.0-229.13.1, which provides a number of bug fixes and enhancements over the previous version, including :

* Fix regression in scsi_send_eh_cmnd()

* boot hangs at 'Console: switching to colour dummy device 80x25'

* Update tcp stack to 3.17 kernel

* Missing some code from patch '(...) Fix VGA switcheroo problem related to hotplug'

* ksoftirqd high CPU usage due to stray tasklet from ioatdma driver

* During Live Partition Mobility (LPM) testing, RHEL 7.1 LPARs will crash in kmem_cache_alloc

(BZ#1253809)

This update also fixes the following bug :

* The hwlat_detector.ko module samples the clock and records any intervals between reads that exceed a specified threshold. However, the module previously tracked the maximum interval seen for the 'inner' interval but did not record when the 'outer' interval was greater. A patch has been applied to fix this bug, and hwlat_detector.ko now correctly records if the outer interval is the maximal interval encountered during the run. (BZ#1252365)

All kernel-rt users are advised to upgrade to these updated packages, which correct these issues and add these enhancements. The system must be rebooted for this update to take effect.

Updated kernel-rt packages that fix multiple security issues, several bugs, and add various enhancements are now available for Red Hat Enterprise Linux 7.

Red Hat Product Security has rated this update as having Important security impact. Common Vulnerability Scoring System (CVSS) base scores, which give detailed severity ratings, are available for each vulnerability from the CVE links in the References section.

The kernel-rt packages contain the Linux kernel, the core of any Linux operating system.

* Two flaws were found in the way the Linux kernel's networking implementation handled UDP packets with incorrect checksum values. A remote attacker could potentially use these flaws to trigger an infinite loop in the kernel, resulting in a denial of service on the system, or cause a denial of service in applications using the edge triggered epoll functionality. (CVE-2015-5364, CVE-2015-5366, Important)

* A flaw was found in the way the Linux kernel's ext4 file system handled the 'page size > block size' condition when the fallocate zero range functionality was used. A local attacker could use this flaw to crash the system. (CVE-2015-0275, Moderate)

* It was found that the Linux kernel's keyring implementation would leak memory when adding a key to a keyring via the add_key() function.
A local attacker could use this flaw to exhaust all available memory on the system. (CVE-2015-1333, Moderate)

* A race condition flaw was found in the way the Linux kernel's SCTP implementation handled Address Configuration lists when performing Address Configuration Change (ASCONF). A local attacker could use this flaw to crash the system via a race condition triggered by setting certain ASCONF options on a socket. (CVE-2015-3212, Moderate)

* An information leak flaw was found in the way the Linux kernel's Virtual Dynamic Shared Object (vDSO) implementation performed address randomization. A local, unprivileged user could use this flaw to leak kernel memory addresses to user-space. (CVE-2014-9585, Low)

Red Hat would like to thank Canonical for reporting the CVE-2015-1333 issue. The CVE-2015-0275 issue was discovered by Xiong Zhou of Red Hat, and the CVE-2015-3212 issue was discovered by Ji Jianwen of Red Hat Engineering.

This update provides a build of the kernel-rt package for Red Hat Enterprise MRG 2.5 that is layered on Red Hat Enterprise Linux 6, and fixes the following issues :

* Fix regression in scsi_send_eh_cmnd()

* boot hangs at 'Console: switching to colour dummy device 80x25'

* Update tcp stack to 3.17 kernel

* ksoftirqd high CPU usage due to stray tasklet from ioatdma driver

(BZ#1245345)

This update also fixes the following bugs :

* The configuration option CONFIG_RTC_HCTOSYS was disabled on the realtime kernel causing the RTC clock to be adjusted with the UTC time even if the system is configured to set the RTC to the local time. By enabling the CONFIG_RTC_HCTOSYS configuration option, when the system is configured to use local time, RTC will correctly update with the local time and not try to use another timezone. (BZ#1248047)

* In the realtime kernel, if a rt_mutex was taken while in interrupt context the normal priority inheritance protocol would falsely identify a deadlock and trigger a kernel crash. The patch that added the rt_mutex in this interrupt context was reverted. (BZ#1250649)

All kernel-rt users are advised to upgrade to these updated packages, which correct these issues and add these enhancements. The system must be rebooted for this update to take effect.

The remote OracleVM system is missing necessary patches to address critical security updates :

  - sctp: fix ASCONF list handling (Marcelo Ricardo Leitner)     [Orabug: 21842668] (CVE-2015-3212)

  - KEYS: ensure we free the assoc array edit if edit is     valid (Colin Ian King) [Orabug: 21842655]     (CVE-2015-1333)

  - Introduce [compat_]save_altstack_ex to unbreak x86 SMAP     (Al Viro) [Orabug: 21549587] - x86, smap: Handle     csum_partial_copy_*_user (H. Peter Anvin) [Orabug:
    21549587] - ext4: fix warning in     ext4_da_update_reserve_space (Jan Kara) [Orabug:
    21621442] - ext4: remove unused variable in     ext4_free_blocks (Lukas Czerner) [Orabug: 21621442] -     quota: provide interface for readding allocated space     into reserved space (Jan Kara) [Orabug: 21621442]

The remote Oracle Linux 6 / 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2015-3078 advisory.

  - Memory leak in the __key_link_end function in security/keys/keyring.c in the Linux kernel before 4.1.4     allows local users to cause a denial of service (memory consumption) via many add_key system calls that     refer to existing keys. (CVE-2015-1333)

  - Race condition in net/sctp/socket.c in the Linux kernel before 4.1.2 allows local users to cause a denial     of service (list corruption and panic) via a rapid series of system calls related to sockets, as     demonstrated by setsockopt calls. (CVE-2015-3212)

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

* A flaw was found in the kernel's implementation of the Berkeley Packet Filter (BPF). A local attacker could craft BPF code to crash the system by creating a situation in which the JIT compiler would fail to correctly optimize the JIT image on the last pass. This would lead to the CPU executing instructions that were not part of the JIT code. (CVE-2015-4700, Important)

* Two flaws were found in the way the Linux kernel's networking implementation handled UDP packets with incorrect checksum values. A remote attacker could potentially use these flaws to trigger an infinite loop in the kernel, resulting in a denial of service on the system, or cause a denial of service in applications using the edge triggered epoll functionality. (CVE-2015-5364, CVE-2015-5366, Important)

* A flaw was found in the way the Linux kernel's ext4 file system handled the 'page size > block size' condition when the fallocate zero range functionality was used. A local attacker could use this flaw to crash the system. (CVE-2015-0275, Moderate)

* It was found that the Linux kernel's keyring implementation would leak memory when adding a key to a keyring via the add_key() function.
A local attacker could use this flaw to exhaust all available memory on the system. (CVE-2015-1333, Moderate)

* A race condition flaw was found in the way the Linux kernel's SCTP implementation handled Address Configuration lists when performing Address Configuration Change (ASCONF). A local attacker could use this flaw to crash the system via a race condition triggered by setting certain ASCONF options on a socket. (CVE-2015-3212, Moderate)

* An information leak flaw was found in the way the Linux kernel's Virtual Dynamic Shared Object (vDSO) implementation performed address randomization. A local, unprivileged user could use this flaw to leak kernel memory addresses to user-space. (CVE-2014-9585, Low)

This update also fixes several bugs.

The system must be rebooted for this update to take effect.

The remote Oracle Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2015-1778 advisory.

  - The vdso_addr function in arch/x86/vdso/vma.c in the Linux kernel through 3.18.2 does not properly choose     memory locations for the vDSO area, which makes it easier for local users to bypass the ASLR protection     mechanism by guessing a location at the end of a PMD. (CVE-2014-9585)

  - The (1) udp_recvmsg and (2) udpv6_recvmsg functions in the Linux kernel before 4.0.6 do not properly     consider yielding a processor, which allows remote attackers to cause a denial of service (system hang)     via incorrect checksums within a UDP packet flood. (CVE-2015-5364)

  - The (1) udp_recvmsg and (2) udpv6_recvmsg functions in the Linux kernel before 4.0.6 provide inappropriate
    -EAGAIN return values, which allows remote attackers to cause a denial of service (EPOLLET epoll     application read outage) via an incorrect checksum in a UDP packet, a different vulnerability than     CVE-2015-5364. (CVE-2015-5366)

  - The ext4_zero_range function in fs/ext4/extents.c in the Linux kernel before 4.1 allows local users to     cause a denial of service (BUG) via a crafted fallocate zero-range request. (CVE-2015-0275)

  - Memory leak in the __key_link_end function in security/keys/keyring.c in the Linux kernel before 4.1.4     allows local users to cause a denial of service (memory consumption) via many add_key system calls that     refer to existing keys. (CVE-2015-1333)

  - Race condition in net/sctp/socket.c in the Linux kernel before 4.1.2 allows local users to cause a denial     of service (list corruption and panic) via a rapid series of system calls related to sockets, as     demonstrated by setsockopt calls. (CVE-2015-3212)

  - The bpf_int_jit_compile function in arch/x86/net/bpf_jit_comp.c in the Linux kernel before 4.0.6 allows     local users to cause a denial of service (system crash) by creating a packet filter and then loading     crafted BPF instructions that trigger late convergence by the JIT compiler. (CVE-2015-4700)

Note that Nessus has not tested for this issue 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 leak.

  - CVE-2015-1333     Colin Ian King discovered a flaw in the add_key function     of the Linux kernel's keyring subsystem. A local user     can exploit this flaw to cause a denial of service due     to memory exhaustion.

  - CVE-2015-3212     Ji Jianwen of Red Hat Engineering discovered a flaw in     the handling of the SCTPs automatic handling of dynamic     multi-homed connections. A local attacker could use this     flaw to cause a crash or potentially for privilege     escalation.

  - CVE-2015-4692     A NULL pointer dereference flaw was found in the     kvm_apic_has_events function in the KVM subsystem. A     unprivileged local user could exploit this flaw to crash     the system kernel resulting in denial of service.

  - CVE-2015-4700     Daniel Borkmann discovered a flaw in the Linux kernel     implementation of the Berkeley Packet Filter which can     be used by a local user to crash the system.

  - CVE-2015-5364     It was discovered that the Linux kernel does not     properly handle invalid UDP checksums. A remote attacker     could exploit this flaw to cause a denial of service     using a flood of UDP packets with invalid checksums.

  - CVE-2015-5366     It was discovered that the Linux kernel does not     properly handle invalid UDP checksums. A remote attacker     can cause a denial of service against applications that     use epoll by injecting a single packet with an invalid     checksum.

  - CVE-2015-5697     A flaw was discovered in the md driver in the Linux     kernel leading to an information leak.

  - CVE-2015-5706     An user triggerable use-after-free vulnerability in path     lookup in the Linux kernel could potentially lead to     privilege escalation.

  - CVE-2015-5707     An integer overflow in the SCSI generic driver in the     Linux kernel was discovered. A local user with write     permission on a SCSI generic device could potentially     exploit this flaw for privilege escalation.

Andy Lutomirski discovered a flaw in the Linux kernel's handling of nested NMIs (non-maskable interrupts). An unprivileged local user could exploit this flaw to cause a denial of service (system crash) or potentially escalate their privileges. (CVE-2015-3290)

Colin King discovered a flaw in the add_key function of the Linux kernel's keyring subsystem. A local user could exploit this flaw to cause a denial of service (memory exhaustion). (CVE-2015-1333)

Andy Lutomirski discovered a flaw that allows user to cause the Linux kernel to ignore some NMIs (non-maskable interrupts). A local unprivileged user could exploit this flaw to potentially cause the system to miss important NMIs resulting in unspecified effects.
(CVE-2015-3291)

Andy Lutomirski and Petr Matousek discovered that an NMI (non-maskable interrupt) that interrupts userspace and encounters an IRET fault is incorrectly handled by the Linux kernel. An unprivileged local user could exploit this flaw to cause a denial of service (kernel OOPs), corruption, or potentially escalate privileges on the system.
(CVE-2015-5157).

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

The remote Ubuntu 14.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-2690-1 advisory.

  - Memory leak in the __key_link_end function in security/keys/keyring.c in the Linux kernel before 4.1.4     allows local users to cause a denial of service (memory consumption) via many add_key system calls that     refer to existing keys. (CVE-2015-1333)

  - arch/x86/entry/entry_64.S in the Linux kernel before 4.1.6 on the x86_64 platform improperly relies on     espfix64 during nested NMI processing, which allows local users to gain privileges by triggering an NMI     within a certain instruction window. (CVE-2015-3290)

  - arch/x86/entry/entry_64.S in the Linux kernel before 4.1.6 on the x86_64 platform does not properly     determine when nested NMI processing is occurring, which allows local users to cause a denial of service     (skipped NMI) by modifying the rsp register, issuing a syscall instruction, and triggering an NMI.
    (CVE-2015-3291)

  - arch/x86/entry/entry_64.S in the Linux kernel before 4.1.6 on the x86_64 platform mishandles IRET faults     in processing NMIs that occurred during userspace execution, which might allow local users to gain     privileges by triggering an NMI. (CVE-2015-5157)

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 14.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-2689-1 advisory.

  - Memory leak in the __key_link_end function in security/keys/keyring.c in the Linux kernel before 4.1.4     allows local users to cause a denial of service (memory consumption) via many add_key system calls that     refer to existing keys. (CVE-2015-1333)

  - arch/x86/entry/entry_64.S in the Linux kernel before 4.1.6 on the x86_64 platform improperly relies on     espfix64 during nested NMI processing, which allows local users to gain privileges by triggering an NMI     within a certain instruction window. (CVE-2015-3290)

  - arch/x86/entry/entry_64.S in the Linux kernel before 4.1.6 on the x86_64 platform does not properly     determine when nested NMI processing is occurring, which allows local users to cause a denial of service     (skipped NMI) by modifying the rsp register, issuing a syscall instruction, and triggering an NMI.
    (CVE-2015-3291)

  - arch/x86/entry/entry_64.S in the Linux kernel before 4.1.6 on the x86_64 platform mishandles IRET faults     in processing NMIs that occurred during userspace execution, which might allow local users to gain     privileges by triggering an NMI. (CVE-2015-5157)

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 14.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-2688-1 advisory.

  - Memory leak in the __key_link_end function in security/keys/keyring.c in the Linux kernel before 4.1.4     allows local users to cause a denial of service (memory consumption) via many add_key system calls that     refer to existing keys. (CVE-2015-1333)

  - arch/x86/entry/entry_64.S in the Linux kernel before 4.1.6 on the x86_64 platform improperly relies on     espfix64 during nested NMI processing, which allows local users to gain privileges by triggering an NMI     within a certain instruction window. (CVE-2015-3290)

  - arch/x86/entry/entry_64.S in the Linux kernel before 4.1.6 on the x86_64 platform does not properly     determine when nested NMI processing is occurring, which allows local users to cause a denial of service     (skipped NMI) by modifying the rsp register, issuing a syscall instruction, and triggering an NMI.
    (CVE-2015-3291)

  - arch/x86/entry/entry_64.S in the Linux kernel before 4.1.6 on the x86_64 platform mishandles IRET faults     in processing NMIs that occurred during userspace execution, which might allow local users to gain     privileges by triggering an NMI. (CVE-2015-5157)

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

ID	Name	Product	Family	Severity
124987	EulerOS Virtualization for ARM 64 3.0.1.0 : kernel (EulerOS-SA-2019-1534)	Nessus	Huawei Local Security Checks	high
124809	EulerOS Virtualization 3.0.1.0 : kernel (EulerOS-SA-2019-1485)	Nessus	Huawei Local Security Checks	high
99163	OracleVM 3.3 : Unbreakable / etc (OVMSA-2017-0057) (Dirty COW)	Nessus	OracleVM Local Security Checks	critical
86882	OracleVM 3.3 : kernel-uek (OVMSA-2015-0147)	Nessus	OracleVM Local Security Checks	high
86881	Oracle Linux 6 / 7 : Unbreakable Enterprise kernel (ELSA-2015-3098)	Nessus	Oracle Linux Local Security Checks	high
86702	RHEL 7 : kernel (RHSA-2015:1778)	Nessus	Red Hat Local Security Checks	high
86668	openSUSE Security Update : the Linux Kernel (openSUSE-2015-686)	Nessus	SuSE Local Security Checks	high
86511	CentOS 7 : kernel (CESA-2015:1778)	Nessus	CentOS Local Security Checks	high
85980	RHEL 7 : kernel-rt (RHSA-2015:1788)	Nessus	Red Hat Local Security Checks	high
85979	RHEL 6 : kernel-rt (RHSA-2015:1787)	Nessus	Red Hat Local Security Checks	high
85968	OracleVM 3.3 : kernel-uek (OVMSA-2015-0122)	Nessus	OracleVM Local Security Checks	medium
85967	Oracle Linux 6 / 7 : Unbreakable Enterprise kernel (ELSA-2015-3078)	Nessus	Oracle Linux Local Security Checks	medium
85960	Scientific Linux Security Update : kernel on SL7.x x86_64 (20150915)	Nessus	Scientific Linux Local Security Checks	high
85958	Oracle Linux 7 : kernel (ELSA-2015-1778)	Nessus	Oracle Linux Local Security Checks	high
85281	Debian DSA-3329-1 : linux - security update	Nessus	Debian Local Security Checks	high
85079	Ubuntu 15.04 : linux vulnerabilities (USN-2691-1)	Nessus	Ubuntu Local Security Checks	high
85078	Ubuntu 14.04 LTS : Linux kernel (Vivid HWE) vulnerabilities (USN-2690-1)	Nessus	Ubuntu Local Security Checks	high
85077	Ubuntu 14.04 LTS : Linux kernel (Utopic HWE) vulnerabilities (USN-2689-1)	Nessus	Ubuntu Local Security Checks	high
85076	Ubuntu 14.04 LTS : Linux kernel vulnerabilities (USN-2688-1)	Nessus	Ubuntu Local Security Checks	high
85075	Ubuntu 12.04 LTS : linux-lts-trusty vulnerabilities (USN-2687-1)	Nessus	Ubuntu Local Security Checks	high

Detections

Analytics

CVE-2015-1333

medium

Tenable Plugins

high

high

critical

high

high

high

high

high

high

high

medium

medium

high

high

high

high

high

high

high

high