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Red Hat Product Errata RHSA-2018:1351 - Security Advisory
Issued:
2018-05-08
Updated:
2018-05-10

RHSA-2018:1351 - Security Advisory

  • Overview
  • Updated Packages

Synopsis

Moderate: kernel security and bug fix update

Type/Severity

Security Advisory: Moderate

Topic

An update for kernel is now available for Red Hat Enterprise Linux 6.6 Advanced Update Support and Red Hat Enterprise Linux 6.6 Telco Extended Update Support.

Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

[Updated 10 May 2018]

The references to CVE-2017-5754 x86 (32-bit) mitigation were removed because Red Hat Enterprise Linux 6.6 Advanced Update Support and Red Hat Enterprise Linux 6.6 Telco Extended Update Support do not include support for x86 32-bit architecture. Consequently, impact rating of this erratum was changed from Important to Moderate.

Description

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

Security Fix(es):

  • Kernel: error in exception handling leads to DoS (CVE-2018-8897)

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 Nick Peterson (Everdox Tech LLC) and Andy Lutomirski for reporting this issue.

Bug Fix(es):

  • If an NFSv3 client mounted a subdirectory of an exported file system, a directory entry to the mount hosting the export was incorrectly held even after clearing the cache. Consequently, attempts to unmount the subdirectory with the umount command failed with the EBUSY error. With this update, the underlying source code has been fixed, and the unmount operation now succeeds as expected in the described situation. (BZ#1538588)
  • The kernel build requirements have been updated to the GNU Compiler Collection (GCC) compiler version that has the support for Retpolines. The Retpolines mechanism is a software construct that leverages specific knowledge of the underlying hardware to mitigate the branch target injection, also known as Spectre variant 2 vulnerability described in CVE-2017-5715. (BZ#1554254)

Solution

For details on how to apply this update, which includes the changes described in this advisory, refer to:

https://access.redhat.com/articles/11258

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

Affected Products

  • Red Hat Enterprise Linux Server - AUS 6.6 x86_64
  • Red Hat Enterprise Linux Server - TUS 6.6 x86_64

Fixes

  • BZ - 1567074 - CVE-2018-8897 Kernel: error in exception handling leads to DoS

CVEs

  • CVE-2018-8897

References

  • https://access.redhat.com/security/updates/classification/#moderate
  • https://access.redhat.com/security/vulnerabilities/pop_ss
  • Note: More recent versions of these packages may be available. Click a package name for more details.

    Red Hat Enterprise Linux Server - AUS 6.6

    SRPM
    kernel-2.6.32-504.68.2.el6.src.rpm SHA-256: a4c22cabf4338af51f79046020ecd19d55a707769804f04f325106a5c2541e22
    x86_64
    kernel-2.6.32-504.68.2.el6.x86_64.rpm SHA-256: 25db8282d8920adf653b65d13676d9abde2e9719ee45dd1ea17a033e1c91d5cd
    kernel-abi-whitelists-2.6.32-504.68.2.el6.noarch.rpm SHA-256: e3f5621ae232c29195d2d29d4770a623b4f1a077567099263b1977c8f0dfa16e
    kernel-debug-2.6.32-504.68.2.el6.x86_64.rpm SHA-256: 3c0df7eb98020fb30d39ea8fcfed5baf4cac99a922e1a05fe5812e968e951148
    kernel-debug-debuginfo-2.6.32-504.68.2.el6.x86_64.rpm SHA-256: 1212330e9105d6d3eaefe2accf4370787d03ffbd525c6b50dce0a0d4a9df589f
    kernel-debug-debuginfo-2.6.32-504.68.2.el6.x86_64.rpm SHA-256: 1212330e9105d6d3eaefe2accf4370787d03ffbd525c6b50dce0a0d4a9df589f
    kernel-debug-devel-2.6.32-504.68.2.el6.x86_64.rpm SHA-256: 7d2157d2d9b10d1762fb0703f35f43d2615fb12decf35a20a5916e4c9d04b4ba
    kernel-debuginfo-2.6.32-504.68.2.el6.x86_64.rpm SHA-256: 043161a6bba7e90d18cf2265188a393eec8cf8dca5881209444995b7a4e17946
    kernel-debuginfo-2.6.32-504.68.2.el6.x86_64.rpm SHA-256: 043161a6bba7e90d18cf2265188a393eec8cf8dca5881209444995b7a4e17946
    kernel-debuginfo-common-x86_64-2.6.32-504.68.2.el6.x86_64.rpm SHA-256: 2c9924f8fd244d0020964596de0c5ade759ee67f41b5a3f8ccf6e7bdc29d0211
    kernel-debuginfo-common-x86_64-2.6.32-504.68.2.el6.x86_64.rpm SHA-256: 2c9924f8fd244d0020964596de0c5ade759ee67f41b5a3f8ccf6e7bdc29d0211
    kernel-devel-2.6.32-504.68.2.el6.x86_64.rpm SHA-256: fe1bc516188eee01fd2f7c7cf80a4d96343b8ba257f47242b132b790045297da
    kernel-doc-2.6.32-504.68.2.el6.noarch.rpm SHA-256: e77477ca8614c462b2119a3099e9236bdf69cf2028266c4f7cf8ed620d0e1f43
    kernel-firmware-2.6.32-504.68.2.el6.noarch.rpm SHA-256: 6ac505b0a99f2c26e0d84b464bd42e7f328ecc3203580e0615f01160642fe71e
    kernel-headers-2.6.32-504.68.2.el6.x86_64.rpm SHA-256: e6ec7906ec37991e771d2fb5046e73ad4672d733a05d517bdd09a682fb59c2a6
    perf-2.6.32-504.68.2.el6.x86_64.rpm SHA-256: 830595f2412dbbce3dc9bfd0b96dfd89c908e7549100c11d470103c00342164a
    perf-debuginfo-2.6.32-504.68.2.el6.x86_64.rpm SHA-256: edb3a53b4ac626f8131b4b68c95493493595697da01520f14b912c273c6502c7
    perf-debuginfo-2.6.32-504.68.2.el6.x86_64.rpm SHA-256: edb3a53b4ac626f8131b4b68c95493493595697da01520f14b912c273c6502c7
    python-perf-2.6.32-504.68.2.el6.x86_64.rpm SHA-256: ba15398096b8768246c536e903193bcc4bb3d8f179972381c4c4feadfc65baa9
    python-perf-debuginfo-2.6.32-504.68.2.el6.x86_64.rpm SHA-256: 73e96e2a4d13e7a19ae73c64219f3de1814e44804c111cd47326310ee2b423e0
    python-perf-debuginfo-2.6.32-504.68.2.el6.x86_64.rpm SHA-256: 73e96e2a4d13e7a19ae73c64219f3de1814e44804c111cd47326310ee2b423e0

    Red Hat Enterprise Linux Server - TUS 6.6

    SRPM
    kernel-2.6.32-504.68.2.el6.src.rpm SHA-256: a4c22cabf4338af51f79046020ecd19d55a707769804f04f325106a5c2541e22
    x86_64
    kernel-2.6.32-504.68.2.el6.x86_64.rpm SHA-256: 25db8282d8920adf653b65d13676d9abde2e9719ee45dd1ea17a033e1c91d5cd
    kernel-abi-whitelists-2.6.32-504.68.2.el6.noarch.rpm SHA-256: e3f5621ae232c29195d2d29d4770a623b4f1a077567099263b1977c8f0dfa16e
    kernel-debug-2.6.32-504.68.2.el6.x86_64.rpm SHA-256: 3c0df7eb98020fb30d39ea8fcfed5baf4cac99a922e1a05fe5812e968e951148
    kernel-debug-debuginfo-2.6.32-504.68.2.el6.x86_64.rpm SHA-256: 1212330e9105d6d3eaefe2accf4370787d03ffbd525c6b50dce0a0d4a9df589f
    kernel-debug-debuginfo-2.6.32-504.68.2.el6.x86_64.rpm SHA-256: 1212330e9105d6d3eaefe2accf4370787d03ffbd525c6b50dce0a0d4a9df589f
    kernel-debug-devel-2.6.32-504.68.2.el6.x86_64.rpm SHA-256: 7d2157d2d9b10d1762fb0703f35f43d2615fb12decf35a20a5916e4c9d04b4ba
    kernel-debuginfo-2.6.32-504.68.2.el6.x86_64.rpm SHA-256: 043161a6bba7e90d18cf2265188a393eec8cf8dca5881209444995b7a4e17946
    kernel-debuginfo-2.6.32-504.68.2.el6.x86_64.rpm SHA-256: 043161a6bba7e90d18cf2265188a393eec8cf8dca5881209444995b7a4e17946
    kernel-debuginfo-common-x86_64-2.6.32-504.68.2.el6.x86_64.rpm SHA-256: 2c9924f8fd244d0020964596de0c5ade759ee67f41b5a3f8ccf6e7bdc29d0211
    kernel-debuginfo-common-x86_64-2.6.32-504.68.2.el6.x86_64.rpm SHA-256: 2c9924f8fd244d0020964596de0c5ade759ee67f41b5a3f8ccf6e7bdc29d0211
    kernel-devel-2.6.32-504.68.2.el6.x86_64.rpm SHA-256: fe1bc516188eee01fd2f7c7cf80a4d96343b8ba257f47242b132b790045297da
    kernel-doc-2.6.32-504.68.2.el6.noarch.rpm SHA-256: e77477ca8614c462b2119a3099e9236bdf69cf2028266c4f7cf8ed620d0e1f43
    kernel-firmware-2.6.32-504.68.2.el6.noarch.rpm SHA-256: 6ac505b0a99f2c26e0d84b464bd42e7f328ecc3203580e0615f01160642fe71e
    kernel-headers-2.6.32-504.68.2.el6.x86_64.rpm SHA-256: e6ec7906ec37991e771d2fb5046e73ad4672d733a05d517bdd09a682fb59c2a6
    perf-2.6.32-504.68.2.el6.x86_64.rpm SHA-256: 830595f2412dbbce3dc9bfd0b96dfd89c908e7549100c11d470103c00342164a
    perf-debuginfo-2.6.32-504.68.2.el6.x86_64.rpm SHA-256: edb3a53b4ac626f8131b4b68c95493493595697da01520f14b912c273c6502c7
    perf-debuginfo-2.6.32-504.68.2.el6.x86_64.rpm SHA-256: edb3a53b4ac626f8131b4b68c95493493595697da01520f14b912c273c6502c7
    python-perf-2.6.32-504.68.2.el6.x86_64.rpm SHA-256: ba15398096b8768246c536e903193bcc4bb3d8f179972381c4c4feadfc65baa9
    python-perf-debuginfo-2.6.32-504.68.2.el6.x86_64.rpm SHA-256: 73e96e2a4d13e7a19ae73c64219f3de1814e44804c111cd47326310ee2b423e0
    python-perf-debuginfo-2.6.32-504.68.2.el6.x86_64.rpm SHA-256: 73e96e2a4d13e7a19ae73c64219f3de1814e44804c111cd47326310ee2b423e0

    The Red Hat security contact is secalert@redhat.com. More contact details at https://access.redhat.com/security/team/contact/.

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