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Red Hat Enterprise Linux 6.1 Advisory RHSA-2012:1148-01 Serious Kernel Bug

red hat
Calendar Grey August 7, 2012
Dist Redhat Esm H88
Red Hat has launched kernel updates resolving a major security vulnerability in Enterprise Linux 6.1 Extended Update Support.
Updated kernel packages that fix one security issue are now available for Red Hat Enterprise Linux 6.1 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/knowledge/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 issue:
* A NULL pointer dereference flaw was found in the nf_ct_frag6_reasm() function in the Linux kernel's netfilter IPv6 connection tracking implementation. A remote attacker could use this flaw to send specially-crafted packets to a target system that is using IPv6 and also has the nf_conntrack_ipv6 kernel module loaded, causing it to crash. (CVE-2012-2744, Important)
Red Hat would like to thank an anonymous contributor working with the Beyond Security SecuriTeam Secure Disclosure program for reporting this issue.
Users should upgrade to these updated packages, which contain a backported patch to resolve this issue. The system must be rebooted for this update to take effect.

Topics%20covered

Topics Covered

security advisory critical remote attack Red Hat Enterprise Linux issue important kernel

References

https://access.redhat.com/security/cve/CVE-2012-2744 https://access.redhat.com/security/updates/classification/#important

Package List

Red Hat Enterprise Linux Server EUS (v. 6.1):
Source: kernel-2.6.32-131.30.1.el6.src.rpm
i386: kernel-2.6.32-131.30.1.el6.i686.rpm kernel-debug-2.6.32-131.30.1.el6.i686.rpm kernel-debug-debuginfo-2.6.32-131.30.1.el6.i686.rpm kernel-debug-devel-2.6.32-131.30.1.el6.i686.rpm kernel-debuginfo-2.6.32-131.30.1.el6.i686.rpm kernel-debuginfo-common-i686-2.6.32-131.30.1.el6.i686.rpm kernel-devel-2.6.32-131.30.1.el6.i686.rpm kernel-headers-2.6.32-131.30.1.el6.i686.rpm perf-2.6.32-131.30.1.el6.i686.rpm perf-debuginfo-2.6.32-131.30.1.el6.i686.rpm
noarch: kernel-doc-2.6.32-131.30.1.el6.noarch.rpm kernel-firmware-2.6.32-131.30.1.el6.noarch.rpm
ppc64: kernel-2.6.32-131.30.1.el6.ppc64.rpm kernel-bootwrapper-2.6.32-131.30.1.el6.ppc64.rpm kernel-debug-2.6.32-131.30.1.el6.ppc64.rpm kernel-debug-debuginfo-2.6.32-131.30.1.el6.ppc64.rpm kernel-debug-devel-2.6.32-131.30.1.el6.ppc64.rpm kernel-debuginfo-2.6.32-131.30.1.el6.ppc64.rpm kernel-debuginfo-common-ppc64-2.6.32-131.30.1.el6.ppc64.rpm kernel-devel-2.6.32-131.30.1.el6.ppc64.rpm kernel-headers-2.6.32-131.30.1.el6.ppc64.rpm perf-2.6.32-131.30.1.el6.ppc64.rpm perf-debuginfo-2.6.32-131.30.1.el6.ppc64.rpm
s390x: kernel-2.6.32-131.30.1.el6.s390x.rpm kernel-debug-2.6.32-131.30.1.el6.s390x.rpm

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2012:1148-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2012:1148.html
Issue date: 2012-08-07

Topic

Updated kernel packages that fix one security issue are now available forRed Hat Enterprise Linux 6.1 Extended Update Support.The Red Hat Security Response Team has rated this update as havingimportant security impact. A Common Vulnerability Scoring System (CVSS)base score, which gives a detailed severity rating, is available from theCVE link in the References section.

Topics%20covered

Topics Covered

security advisory critical remote attack Red Hat Enterprise Linux issue important kernel

Relevant Releases Architectures

Red Hat Enterprise Linux Server EUS (v. 6.1) - i386, noarch, ppc64, s390x, x86_64

Bugs Fixed

833402 - CVE-2012-2744 kernel: netfilter: null pointer dereference in nf_ct_frag6_reasm()

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