Synopsis

Important: kernel security update

Type/Severity

Security Advisory: Important

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 Important. 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.

Description

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

Security Fix(es):

• Modern operating systems implement virtualization of physical memory to efficiently use available system resources and provide inter-domain protection through access control and isolation. The L1TF issue was found in the way the x86 microprocessor designs have implemented speculative execution of instructions (a commonly used performance optimisation) in combination with handling of page-faults caused by terminated virtual to physical address resolving process. As a result, an unprivileged attacker could use this flaw to read privileged memory of the kernel or other processes and/or cross guest/host boundaries to read host memory by conducting targeted cache side-channel attacks. (CVE-2018-3620, CVE-2018-3646)
  
• kernel: kvm: vmx: host GDT limit corruption (CVE-2018-10901)
  

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 Intel OSSIRT (Intel.com) for reporting CVE-2018-3620 and CVE-2018-3646 and Vegard Nossum (Oracle Corporation) for reporting CVE-2018-10901.

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 - 1585005 - CVE-2018-3646 Kernel: hw: cpu: L1 terminal fault (L1TF)
• BZ - 1601849 - CVE-2018-10901 kernel: kvm: vmx: host GDT limit corruption

CVEs

• CVE-2018-3620
• CVE-2018-3646
• CVE-2018-10901

References

• https://access.redhat.com/security/updates/classification/#important
• https://access.redhat.com/security/vulnerabilities/L1TF

Red Hat Enterprise Linux Server - AUS 6.6

SRPM
kernel-2.6.32-504.72.4.el6.src.rpm	SHA-256: d87650bd785e24f6f448f8ca42581be28de605a2a80bbd1353833b287bcf14d3
x86_64
kernel-2.6.32-504.72.4.el6.x86_64.rpm	SHA-256: 65023c18eddcb738aa972076ed10d2212b3232f277047ec812720a44bf7459d6
kernel-abi-whitelists-2.6.32-504.72.4.el6.noarch.rpm	SHA-256: 1b93cfe6ce60ac93c68f1aa2d0227ea4ed43cf48e3704b00824f41e34af0521f
kernel-debug-2.6.32-504.72.4.el6.x86_64.rpm	SHA-256: 170846dea0ac35e5fd9495e387736579352e918764fc836ee06de909b5d7f952
kernel-debug-debuginfo-2.6.32-504.72.4.el6.x86_64.rpm	SHA-256: 620cee4961735fe9b74a30237ded54a2c445978504c638be858474643b235dc9
kernel-debug-debuginfo-2.6.32-504.72.4.el6.x86_64.rpm	SHA-256: 620cee4961735fe9b74a30237ded54a2c445978504c638be858474643b235dc9
kernel-debug-devel-2.6.32-504.72.4.el6.x86_64.rpm	SHA-256: 7dfa909a7f78b52a439c72c82db5d6b1c9d84920f6423556918dbb2f8a646bad
kernel-debuginfo-2.6.32-504.72.4.el6.x86_64.rpm	SHA-256: e4e205d6de04bd05f6eb8b5713a61ca2844ecaeda22409a9f08fb9547b342a0f
kernel-debuginfo-2.6.32-504.72.4.el6.x86_64.rpm	SHA-256: e4e205d6de04bd05f6eb8b5713a61ca2844ecaeda22409a9f08fb9547b342a0f
kernel-debuginfo-common-x86_64-2.6.32-504.72.4.el6.x86_64.rpm	SHA-256: e90555eaf63e31109fea417f3ef271c4251529c3f585bb0680c6f5b0c36dcc37
kernel-debuginfo-common-x86_64-2.6.32-504.72.4.el6.x86_64.rpm	SHA-256: e90555eaf63e31109fea417f3ef271c4251529c3f585bb0680c6f5b0c36dcc37
kernel-devel-2.6.32-504.72.4.el6.x86_64.rpm	SHA-256: f9395f4dd1dd9890106314301beec4b6f0f330ceec865092e32a38601b622489
kernel-doc-2.6.32-504.72.4.el6.noarch.rpm	SHA-256: 6977bcb554afb6e165858468a6e56878964108551d6040e7352c0b9efcf41809
kernel-firmware-2.6.32-504.72.4.el6.noarch.rpm	SHA-256: 142a994a8f2dbe562e551919189fae3e4f2fa3a151b3c2051531d6ff63769e04
kernel-headers-2.6.32-504.72.4.el6.x86_64.rpm	SHA-256: ed68bcdc5f0e5c5bab822c091f2ea7e58743ee9dd60f877dfcc0d3a0cbc4ca6e
perf-2.6.32-504.72.4.el6.x86_64.rpm	SHA-256: 642f5702082651be85302cb26fa03e6201dba09ec7d39517aad700cce87e17c0
perf-debuginfo-2.6.32-504.72.4.el6.x86_64.rpm	SHA-256: 2ad157cd805fdb805cb03a36fb7267a567bfdacce7a31b09cbe8bd6613f1358b
perf-debuginfo-2.6.32-504.72.4.el6.x86_64.rpm	SHA-256: 2ad157cd805fdb805cb03a36fb7267a567bfdacce7a31b09cbe8bd6613f1358b
python-perf-2.6.32-504.72.4.el6.x86_64.rpm	SHA-256: a87b42fdcef2f9f9fa2beb40261df269b0a230a29a334311741cd7a7b7ae27cb
python-perf-debuginfo-2.6.32-504.72.4.el6.x86_64.rpm	SHA-256: 21fe2512b7f13105172a080a0efe46b31f2ec79ce51a52f586de7149cf30990e
python-perf-debuginfo-2.6.32-504.72.4.el6.x86_64.rpm	SHA-256: 21fe2512b7f13105172a080a0efe46b31f2ec79ce51a52f586de7149cf30990e

Red Hat Enterprise Linux Server - TUS 6.6

SRPM
kernel-2.6.32-504.72.4.el6.src.rpm	SHA-256: d87650bd785e24f6f448f8ca42581be28de605a2a80bbd1353833b287bcf14d3
x86_64
kernel-2.6.32-504.72.4.el6.x86_64.rpm	SHA-256: 65023c18eddcb738aa972076ed10d2212b3232f277047ec812720a44bf7459d6
kernel-abi-whitelists-2.6.32-504.72.4.el6.noarch.rpm	SHA-256: 1b93cfe6ce60ac93c68f1aa2d0227ea4ed43cf48e3704b00824f41e34af0521f
kernel-debug-2.6.32-504.72.4.el6.x86_64.rpm	SHA-256: 170846dea0ac35e5fd9495e387736579352e918764fc836ee06de909b5d7f952
kernel-debug-debuginfo-2.6.32-504.72.4.el6.x86_64.rpm	SHA-256: 620cee4961735fe9b74a30237ded54a2c445978504c638be858474643b235dc9
kernel-debug-debuginfo-2.6.32-504.72.4.el6.x86_64.rpm	SHA-256: 620cee4961735fe9b74a30237ded54a2c445978504c638be858474643b235dc9
kernel-debug-devel-2.6.32-504.72.4.el6.x86_64.rpm	SHA-256: 7dfa909a7f78b52a439c72c82db5d6b1c9d84920f6423556918dbb2f8a646bad
kernel-debuginfo-2.6.32-504.72.4.el6.x86_64.rpm	SHA-256: e4e205d6de04bd05f6eb8b5713a61ca2844ecaeda22409a9f08fb9547b342a0f
kernel-debuginfo-2.6.32-504.72.4.el6.x86_64.rpm	SHA-256: e4e205d6de04bd05f6eb8b5713a61ca2844ecaeda22409a9f08fb9547b342a0f
kernel-debuginfo-common-x86_64-2.6.32-504.72.4.el6.x86_64.rpm	SHA-256: e90555eaf63e31109fea417f3ef271c4251529c3f585bb0680c6f5b0c36dcc37
kernel-debuginfo-common-x86_64-2.6.32-504.72.4.el6.x86_64.rpm	SHA-256: e90555eaf63e31109fea417f3ef271c4251529c3f585bb0680c6f5b0c36dcc37
kernel-devel-2.6.32-504.72.4.el6.x86_64.rpm	SHA-256: f9395f4dd1dd9890106314301beec4b6f0f330ceec865092e32a38601b622489
kernel-doc-2.6.32-504.72.4.el6.noarch.rpm	SHA-256: 6977bcb554afb6e165858468a6e56878964108551d6040e7352c0b9efcf41809
kernel-firmware-2.6.32-504.72.4.el6.noarch.rpm	SHA-256: 142a994a8f2dbe562e551919189fae3e4f2fa3a151b3c2051531d6ff63769e04
kernel-headers-2.6.32-504.72.4.el6.x86_64.rpm	SHA-256: ed68bcdc5f0e5c5bab822c091f2ea7e58743ee9dd60f877dfcc0d3a0cbc4ca6e
perf-2.6.32-504.72.4.el6.x86_64.rpm	SHA-256: 642f5702082651be85302cb26fa03e6201dba09ec7d39517aad700cce87e17c0
perf-debuginfo-2.6.32-504.72.4.el6.x86_64.rpm	SHA-256: 2ad157cd805fdb805cb03a36fb7267a567bfdacce7a31b09cbe8bd6613f1358b
perf-debuginfo-2.6.32-504.72.4.el6.x86_64.rpm	SHA-256: 2ad157cd805fdb805cb03a36fb7267a567bfdacce7a31b09cbe8bd6613f1358b
python-perf-2.6.32-504.72.4.el6.x86_64.rpm	SHA-256: a87b42fdcef2f9f9fa2beb40261df269b0a230a29a334311741cd7a7b7ae27cb
python-perf-debuginfo-2.6.32-504.72.4.el6.x86_64.rpm	SHA-256: 21fe2512b7f13105172a080a0efe46b31f2ec79ce51a52f586de7149cf30990e
python-perf-debuginfo-2.6.32-504.72.4.el6.x86_64.rpm	SHA-256: 21fe2512b7f13105172a080a0efe46b31f2ec79ce51a52f586de7149cf30990e