Synopsis

Moderate: kernel-rt security, and enhancement update

Type/Severity

Security Advisory: Moderate

Topic

Updated kernel-rt packages that fix two security issues and add one enhancement are now available for Red Hat Enterprise MRG 2.

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.

Description

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: Buffer over-read in keyring subsystem allows exposing potentially sensitive information to local attacker (CVE-2017-13305)
  
• Kernel: FPU state information leakage via lazy FPU restore (CVE-2018-3665)
  

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 Julian Stecklina (Amazon.de), Thomas Prescher (cyberus-technology.de), and Zdenek Sojka (sysgo.com) for reporting CVE-2018-3665.

Enhancement(s):

• The kernel-rt packages have been upgraded to version 3.10.0-693.35.1.rt56.623, which provides a number of bug fixes over the previous version. (BZ#1579972)
  

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

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

Solution

Before applying this update, make sure all previously released errata relevant to your system have been applied.

For details on how to apply this update, refer to:

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

Affected Products

• MRG Realtime 2 x86_64

Fixes

• BZ - 1579972 - Update the kernel-rt sources with the latest 3.10 sources.
• BZ - 1581637 - CVE-2017-13305 kernel: Buffer over-read in keyring subsystem allows exposing potentially sensitive information to local attacker
• BZ - 1585011 - CVE-2018-3665 Kernel: FPU state information leakage via lazy FPU restore

CVEs

• CVE-2017-13305
• CVE-2018-3665

References

• https://access.redhat.com/security/updates/classification/#moderate

MRG Realtime 2

SRPM
kernel-rt-3.10.0-693.35.1.rt56.625.el6rt.src.rpm	SHA-256: c54628d098951ca9ade113f3ab4b71e3b7a9cb46c72b836f4f3d103d245a0eb3
x86_64
kernel-rt-3.10.0-693.35.1.rt56.625.el6rt.x86_64.rpm	SHA-256: 93bbfc60c575ccf0a878689eea4c985678ea7366266ee62499d2d9146f4de559
kernel-rt-debug-3.10.0-693.35.1.rt56.625.el6rt.x86_64.rpm	SHA-256: 38352ff121203dd4f4abdb2664e81cf48b4ea6bc8718ce40a8c5e2ff0b2aa893
kernel-rt-debug-debuginfo-3.10.0-693.35.1.rt56.625.el6rt.x86_64.rpm	SHA-256: 5de8f39ea44c3270f67cf1562dc380036866260d7de6b070e66ad17ff88de1ba
kernel-rt-debug-devel-3.10.0-693.35.1.rt56.625.el6rt.x86_64.rpm	SHA-256: 15cea83b1fd608e1d7c7252a33a816626adb90f832cea3fbeaa569b604345d4c
kernel-rt-debuginfo-3.10.0-693.35.1.rt56.625.el6rt.x86_64.rpm	SHA-256: 62c1c73105995952e5139396ddb7f28d59c9f62a4018be738e1c101ae3e84e8e
kernel-rt-debuginfo-common-x86_64-3.10.0-693.35.1.rt56.625.el6rt.x86_64.rpm	SHA-256: 6752ccea410981b8bf40d12953eba580f1e832c3046bfbd962de90a77a1810d1
kernel-rt-devel-3.10.0-693.35.1.rt56.625.el6rt.x86_64.rpm	SHA-256: 67365b5edf97c548624daea0f0880a98b37dc2953092eec667f680316c7a5b0e
kernel-rt-doc-3.10.0-693.35.1.rt56.625.el6rt.noarch.rpm	SHA-256: 256ef282082002d7728bd27eda4fc3ae317e4ec6b692cde585405733969af134
kernel-rt-firmware-3.10.0-693.35.1.rt56.625.el6rt.noarch.rpm	SHA-256: b8934f61431f456edb21f494edc656b5e7de7cf5fc141251d9732d4c50b4dfd7
kernel-rt-trace-3.10.0-693.35.1.rt56.625.el6rt.x86_64.rpm	SHA-256: ab8cb48bb0345b1d4d95c2322bdcb88a24f248973a4b13fc06ebedb4fa2cd366
kernel-rt-trace-debuginfo-3.10.0-693.35.1.rt56.625.el6rt.x86_64.rpm	SHA-256: c5f08efbc86f577437fb3ac2e956ec085f5e885535362dfedcc21f35280c44a4
kernel-rt-trace-devel-3.10.0-693.35.1.rt56.625.el6rt.x86_64.rpm	SHA-256: a84131b2dc8796de96ff4ec1d7dfd6997404d3236dd37a003bae826c11cbedfd
kernel-rt-vanilla-3.10.0-693.35.1.rt56.625.el6rt.x86_64.rpm	SHA-256: e7bb0ca14a4c7d3a8d84f1df4c00d19f2415a7a75e3c868eccb30425db4b91f2
kernel-rt-vanilla-debuginfo-3.10.0-693.35.1.rt56.625.el6rt.x86_64.rpm	SHA-256: f29804d1e013300e2faf778ee86e0fa7aab85a2a5422ac709123753aba4a2ec2
kernel-rt-vanilla-devel-3.10.0-693.35.1.rt56.625.el6rt.x86_64.rpm	SHA-256: b64cff84255ebf66bb5f20e331e54b72ab4b5b9e1c156b5482ba037611889d46