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Red Hat 6.2 RHSA-2013:0741-01 Important: Kernel Privilege Escalation Fix

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Calendar Grey April 16, 2013
Scroller Redhat
Latest kernel updates for Red Hat Enterprise Linux tackle significant security vulnerabilities and resolve various bugs. Discover further details today.
Updated kernel packages that fix two security issues and several bugs are now available for Red Hat Enterprise Linux 6.2 Extended Update 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.
This update fixes the following security issues:
* A race condition was found in the way the Linux kernel's ptrace implementation handled PTRACE_SETREGS requests when the debuggee was woken due to a SIGKILL signal instead of being stopped. A local, unprivileged user could use this flaw to escalate their privileges. (CVE-2013-0871, Important)
* A use-after-free flaw was found in the Linux kernel's memory management subsystem in the way quota handling for huge pages was performed. A local, unprivileged user could use this flaw to cause a denial of service or, potentially, escalate their privileges. (CVE-2012-2133, Moderate)
Red Hat would like to thank Shachar Raindel for reporting CVE-2012-2133.
This update also fixes several bugs. Documentation for these changes will be available shortly from the Technical Notes document linked to in the References section.
Users should upgrade to these updated packages, which contain backported patches to correct these issues. The system must be rebooted for this update to take effect.

Topics%20covered

Topics Covered

security advisory denial of service Red Hat privilege escalation important kernel fix

References

https://access.redhat.com/security/cve/CVE-2012-2133 https://access.redhat.com/security/cve/CVE-2013-0871 https://access.redhat.com/security/updates/classification#important https://access.redhat.com/site/documentation/en-US/Red_Hat_Enterprise_Linux/6/html/6.2_Technical_Notes/kernel.html

Package List

Red Hat Enterprise Linux Server EUS (v. 6.2):
Source: kernel-2.6.32-220.34.1.el6.src.rpm
i386: kernel-2.6.32-220.34.1.el6.i686.rpm kernel-debug-2.6.32-220.34.1.el6.i686.rpm kernel-debug-debuginfo-2.6.32-220.34.1.el6.i686.rpm kernel-debug-devel-2.6.32-220.34.1.el6.i686.rpm kernel-debuginfo-2.6.32-220.34.1.el6.i686.rpm kernel-debuginfo-common-i686-2.6.32-220.34.1.el6.i686.rpm kernel-devel-2.6.32-220.34.1.el6.i686.rpm kernel-headers-2.6.32-220.34.1.el6.i686.rpm perf-2.6.32-220.34.1.el6.i686.rpm perf-debuginfo-2.6.32-220.34.1.el6.i686.rpm python-perf-debuginfo-2.6.32-220.34.1.el6.i686.rpm
noarch: kernel-doc-2.6.32-220.34.1.el6.noarch.rpm kernel-firmware-2.6.32-220.34.1.el6.noarch.rpm
ppc64: kernel-2.6.32-220.34.1.el6.ppc64.rpm kernel-bootwrapper-2.6.32-220.34.1.el6.ppc64.rpm kernel-debug-2.6.32-220.34.1.el6.ppc64.rpm kernel-debug-debuginfo-2.6.32-220.34.1.el6.ppc64.rpm kernel-debug-devel-2.6.32-220.34.1.el6.ppc64.rpm kernel-debuginfo-2.6.32-220.34.1.el6.ppc64.rpm kernel-debuginfo-common-ppc64-2.6.32-220.34.1.el6.ppc64.rpm kernel-devel-2.6.32-220.34.1.el6.ppc64.rpm kernel-headers-2.6.32-220.34.1.el6.ppc64.rpm perf-2.6.32-220.34.1.el6.ppc64.rpm perf-debuginfo-2.6.32-220.34.1.el6.ppc64.rpm python-perf-debuginfo-2.6.32-220.34.1.el6.ppc64.rpm
s390x:

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2013:0741-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2013:0741.html
Issue date: 2013-04-16

Topic

Updated kernel packages that fix two security issues and several bugs arenow available for Red Hat Enterprise Linux 6.2 Extended Update Support.The Red Hat Security Response Team has rated this update as havingimportant security impact. Common Vulnerability Scoring System (CVSS) basescores, which give detailed severity ratings, are available for eachvulnerability from the CVE links in the References section.

Topics%20covered

Topics Covered

security advisory denial of service Red Hat privilege escalation important kernel fix

Relevant Releases Architectures

Red Hat Enterprise Linux Server EUS (v. 6.2) - i386, noarch, ppc64, s390x, x86_64

Red Hat Enterprise Linux Server Optional EUS (v. 6.2) - i386, ppc64, s390x, x86_64

Bugs Fixed

817430 - CVE-2012-2133 kernel: use after free bug in "quota" handling

911937 - CVE-2013-0871 kernel: race condition with PTRACE_SETREGS

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