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Red Hat: RHSA-2015:0009-01 Critical: Kernel Local Escalation

red hat
Calendar Grey January 5, 2015
Dist Redhat Esm H88
Kernel updates for Red Hat Enterprise Linux 4 address critical security vulnerabilities. Upgrading is advised to safeguard your system.
Updated kernel packages that fix one security issue are now available for Red Hat Enterprise Linux 4 Extended Life Cycle Support

Solution

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

This update is available via the Red Hat Network. Details on how to use the Red Hat Network to apply this update are available at https://access.redhat.com/articles/11258

To install kernel packages manually, use "rpm -ivh [package]". Do not use "rpm -Uvh" as that will remove the running kernel binaries from your system. You may use "rpm -e" to remove old kernels after determining that the new kernel functions properly on your system.

Summary

The kernel packages contain the Linux kernel, the core of any Linux operating system.
* A flaw was found in the way the Linux kernel handled GS segment register base switching when recovering from a #SS (stack segment) fault on an erroneous return to user space. A local, unprivileged user could use this flaw to escalate their privileges on the system. (CVE-2014-9322, Important)
Red Hat would like to thank Andy Lutomirski for reporting this issue.
All kernel users are advised to upgrade to these updated packages, which contain a backported patch to correct this issue. The system must be rebooted for this update to take effect.

Topics%20covered

Topics Covered

security advisory critical issue Red Hat kernel update local escalation Linux kernel

References

https://access.redhat.com/security/cve/CVE-2014-9322 https://access.redhat.com/security/updates/classification/#important

Package List

Red Hat Enterprise Linux AS (v. 4 ELS):
Source: kernel-2.6.9-106.EL.src.rpm
i386: kernel-2.6.9-106.EL.i686.rpm kernel-debuginfo-2.6.9-106.EL.i686.rpm kernel-devel-2.6.9-106.EL.i686.rpm kernel-hugemem-2.6.9-106.EL.i686.rpm kernel-hugemem-devel-2.6.9-106.EL.i686.rpm kernel-smp-2.6.9-106.EL.i686.rpm kernel-smp-devel-2.6.9-106.EL.i686.rpm kernel-xenU-2.6.9-106.EL.i686.rpm kernel-xenU-devel-2.6.9-106.EL.i686.rpm
ia64: kernel-2.6.9-106.EL.ia64.rpm kernel-debuginfo-2.6.9-106.EL.ia64.rpm kernel-devel-2.6.9-106.EL.ia64.rpm kernel-largesmp-2.6.9-106.EL.ia64.rpm kernel-largesmp-devel-2.6.9-106.EL.ia64.rpm
noarch: kernel-doc-2.6.9-106.EL.noarch.rpm
x86_64: kernel-2.6.9-106.EL.x86_64.rpm kernel-debuginfo-2.6.9-106.EL.x86_64.rpm kernel-devel-2.6.9-106.EL.x86_64.rpm kernel-largesmp-2.6.9-106.EL.x86_64.rpm kernel-largesmp-devel-2.6.9-106.EL.x86_64.rpm kernel-smp-2.6.9-106.EL.x86_64.rpm kernel-smp-devel-2.6.9-106.EL.x86_64.rpm kernel-xenU-2.6.9-106.EL.x86_64.rpm kernel-xenU-devel-2.6.9-106.EL.x86_64.rpm
Red Hat Enterprise Linux ES (v. 4 ELS):
Source: kernel-2.6.9-106.EL.src.rpm
i386: kernel-2.6.9-106.EL.i686.rpm kernel-debuginfo-2.6.9-106.EL.i686.rpm kernel-devel-2.6.9-106.EL.i686.rpm kernel-hugemem-2.6.9-106.EL.i686.rpm kernel-hugemem-devel-2.6.9-106.EL.i686.rpm

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2015:0009-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2015:0009.html
Issue date: 2015-01-05

Topic

Updated kernel packages that fix one security issue are now available forRed Hat Enterprise Linux 4 Extended Life Cycle Support.Red Hat Product Security has rated this update as having Important securityimpact. A Common Vulnerability Scoring System (CVSS) base score, whichgives a detailed severity rating, is available from the CVE link in theReferences section.

Topics%20covered

Topics Covered

security advisory critical issue Red Hat kernel update local escalation Linux kernel

Relevant Releases Architectures

Red Hat Enterprise Linux AS (v. 4 ELS) - i386, ia64, noarch, x86_64

Red Hat Enterprise Linux ES (v. 4 ELS) - i386, noarch, x86_64

Bugs Fixed

1172806 - CVE-2014-9322 kernel: x86: local privesc due to bad_iret and paranoid entry incompatibility

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