Oval Definition:oval:com.redhat.rhsa:def:20180654
Revision Date:2018-04-10Version:602
Title:RHSA-2018:0654: kernel-alt security, bug fix, and enhancement update (Important)
Description:The kernel-alt packages provide the Linux kernel version 4.x.

  • The following packages have been upgraded to a later upstream version: kernel-alt (4.14.0). (BZ#1492717)

    Security Fix(es):

    An industry-wide issue was found in the way many modern microprocessor designs have implemented speculative execution of instructions (a commonly used performance optimization). There are three primary variants of the issue which differ in the way the speculative execution can be exploited.

    Variant CVE-2017-5715 triggers the speculative execution by utilizing branch target injection. It relies on the presence of a precisely-defined instruction sequence in the privileged code as well as the fact that memory accesses may cause allocation into the microprocessor's data cache even for speculatively executed instructions that never actually commit (retire). As a result, an unprivileged attacker could use this flaw to cross the syscall and guest/host boundaries and read privileged memory by conducting targeted cache side-channel attacks. (CVE-2017-5715, Important, ARM)

    Variant CVE-2017-5753 triggers the speculative execution by performing a bounds-check bypass. It relies on the presence of a precisely-defined instruction sequence in the privileged code as well as the fact that memory accesses may cause allocation into the microprocessor's data cache even for speculatively executed instructions that never actually commit (retire). As a result, an unprivileged attacker could use this flaw to cross the syscall boundary and read privileged memory by conducting targeted cache side-channel attacks. (CVE-2017-5753, Important, ARM)

    Variant CVE-2017-5754 relies on the fact that, on impacted microprocessors, during speculative execution of instruction permission faults, exception generation triggered by a faulting access is suppressed until the retirement of the whole instruction block. In a combination with the fact that memory accesses may populate the cache even when the block is being dropped and never committed (executed), an unprivileged local attacker could use this flaw to read privileged (kernel space) memory by conducting targeted cache side-channel attacks. (CVE-2017-5754, Important, ARM)

  • kernel: memory leak when merging buffers in SCSI IO vectors (CVE-2017-12190, Moderate)

  • kernel: net: double-free and memory corruption in get_net_ns_by_id() (CVE-2017-15129, Moderate)

  • kernel: Incorrect updates of uninstantiated keys crash the kernel (CVE-2017-15299, Moderate)

  • kernel: Missing capabilities check in net/netfilter/nfnetlink_cthelper.c allows for unprivileged access to systemwide nfnl_cthelper_list structure (CVE-2017-17448, Moderate)

  • kernel: Missing namespace check in net/netlink/af_netlink.c allows for network monitors to observe systemwide activity (CVE-2017-17449, Moderate)

  • kernel: Arbitrary stack overwrite causing oops via crafted signal frame (CVE-2017-1000255, Moderate)

  • kernel: Stack information leak in the EFS element (CVE-2017-1000410, Moderate)

  • kernel: Race condition in sound system can lead to denial of service (CVE-2018-1000004, Moderate)

  • kernel: Buffer overflow in mp_override_legacy_irq() (CVE-2017-11473, Low)

  • kernel: Integer overflow in futex.c:futux_requeue can lead to denial of service or unspecified impact (CVE-2018-6927, Low)

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

    Red Hat would like to thank Google Project Zero for reporting CVE-2017-5715, CVE-2017-5753, and CVE-2017-5754; Vitaly Mayatskih for reporting CVE-2017-12190; Kirill Tkhai for reporting CVE-2017-15129; Michael Ellerman, Gustavo Romero, Breno Leitao, Paul Mackerras, and Cyril Bur for reporting CVE-2017-1000255; and Armis Labs for reporting CVE-2017-1000410.

    Additional Changes:

    See the Red Hat Enterprise Linux 7.5 Release Notes linked from References.
  • Family:unixClass:patch
    Status:Reference(s):CVE-2017-1000255
    CVE-2017-1000410
    CVE-2017-11473
    CVE-2017-12190
    CVE-2017-12192
    CVE-2017-15129
    CVE-2017-15299
    CVE-2017-15306
    CVE-2017-17448
    CVE-2017-17449
    CVE-2018-1000004
    CVE-2018-6927
    RHSA-2018:0654-00
    RHSA-2018:0654-01
    Platform(s):Red Hat Enterprise Linux 7
    Product(s):
    Definition Synopsis
  • Release Information
  • Red Hat Enterprise Linux 7 Client is installed
  • OR Red Hat Enterprise Linux 7 Server is installed
  • OR Red Hat Enterprise Linux 7 Workstation is installed
  • OR Red Hat Enterprise Linux 7 ComputeNode is installed
  • AND Package Information
  • kernel is earlier than 0:4.14.0-49.el7a
  • AND kernel is signed with Red Hat redhatrelease2 key
  • OR
  • kernel-abi-whitelists is earlier than 0:4.14.0-49.el7a
  • AND kernel-abi-whitelists is signed with Red Hat redhatrelease2 key
  • OR
  • kernel-bootwrapper is earlier than 0:4.14.0-49.el7a
  • AND kernel-bootwrapper is signed with Red Hat redhatrelease2 key
  • OR
  • kernel-debug is earlier than 0:4.14.0-49.el7a
  • AND kernel-debug is signed with Red Hat redhatrelease2 key
  • OR
  • kernel-debug-devel is earlier than 0:4.14.0-49.el7a
  • AND kernel-debug-devel is signed with Red Hat redhatrelease2 key
  • OR
  • kernel-devel is earlier than 0:4.14.0-49.el7a
  • AND kernel-devel is signed with Red Hat redhatrelease2 key
  • OR
  • kernel-doc is earlier than 0:4.14.0-49.el7a
  • AND kernel-doc is signed with Red Hat redhatrelease2 key
  • OR
  • kernel-headers is earlier than 0:4.14.0-49.el7a
  • AND kernel-headers is signed with Red Hat redhatrelease2 key
  • OR
  • kernel-kdump is earlier than 0:4.14.0-49.el7a
  • AND kernel-kdump is signed with Red Hat redhatrelease2 key
  • OR
  • kernel-kdump-devel is earlier than 0:4.14.0-49.el7a
  • AND kernel-kdump-devel is signed with Red Hat redhatrelease2 key
  • OR
  • kernel-tools is earlier than 0:4.14.0-49.el7a
  • AND kernel-tools is signed with Red Hat redhatrelease2 key
  • OR
  • kernel-tools-libs is earlier than 0:4.14.0-49.el7a
  • AND kernel-tools-libs is signed with Red Hat redhatrelease2 key
  • OR
  • kernel-tools-libs-devel is earlier than 0:4.14.0-49.el7a
  • AND kernel-tools-libs-devel is signed with Red Hat redhatrelease2 key
  • OR
  • perf is earlier than 0:4.14.0-49.el7a
  • AND perf is signed with Red Hat redhatrelease2 key
  • OR
  • python-perf is earlier than 0:4.14.0-49.el7a
  • AND python-perf is signed with Red Hat redhatrelease2 key
  • BACK