Issued:

2013-10-16

Updated:

2013-10-16

RHSA-2013:1436 - Moderate: kernel security and bug fix update

Synopsis

Moderate: kernel security and bug fix update

Type/Severity

Security Advisory Moderate

Topic

Updated kernel packages that fix two security issues and several bugs are now available for Red Hat Enterprise Linux 6.

The Red Hat Security Response Team has rated this update as having moderate security impact. Common Vulnerability Scoring System (CVSS) base scores, which give detailed severity ratings, are available for each vulnerability from the CVE links in the References section.

Description

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

• A flaw was found in the way the Linux kernel's TCP/IP protocol suite implementation handled IPv6 sockets that used the UDP_CORK option. A local, unprivileged user could use this flaw to cause a denial of service. (CVE-2013-4162, Moderate)

• An information leak flaw was found in the way Linux kernel's device mapper subsystem, under certain conditions, interpreted data written to snapshot block devices. An attacker could use this flaw to read data from disk blocks in free space, which are normally inaccessible. (CVE-2013-4299, Moderate)

Red Hat would like to thank Hannes Frederic Sowa for reporting CVE-2013-4162; and Fujitsu for reporting CVE-2013-4299.

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.

All kernel users are advised to upgrade to these updated packages, which contain backported patches to correct these issues. 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.

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/site/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.

Affected Products

Updated Packages

• kernel-debug-debuginfo-2.6.32-358.23.2.el6.s390x.rpm
• kernel-kdump-debuginfo-2.6.32-358.23.2.el6.s390x.rpm
• python-perf-debuginfo-2.6.32-358.23.2.el6.s390x.rpm
• kernel-debuginfo-common-ppc64-2.6.32-358.23.2.el6.ppc64.rpm
• kernel-2.6.32-358.23.2.el6.x86_64.rpm
• perf-2.6.32-358.23.2.el6.i686.rpm
• perf-debuginfo-2.6.32-358.23.2.el6.ppc64.rpm
• kernel-bootwrapper-2.6.32-358.23.2.el6.ppc64.rpm
• kernel-headers-2.6.32-358.23.2.el6.ppc64.rpm
• kernel-debug-devel-2.6.32-358.23.2.el6.s390x.rpm
• kernel-2.6.32-358.23.2.el6.i686.rpm
• kernel-devel-2.6.32-358.23.2.el6.ppc64.rpm
• kernel-debug-2.6.32-358.23.2.el6.x86_64.rpm
• python-perf-2.6.32-358.23.2.el6.ppc64.rpm
• python-perf-2.6.32-358.23.2.el6.i686.rpm
• kernel-debug-debuginfo-2.6.32-358.23.2.el6.i686.rpm
• perf-2.6.32-358.23.2.el6.x86_64.rpm
• kernel-debuginfo-common-x86_64-2.6.32-358.23.2.el6.x86_64.rpm
• python-perf-debuginfo-2.6.32-358.23.2.el6.x86_64.rpm
• kernel-debuginfo-2.6.32-358.23.2.el6.s390x.rpm
• kernel-debug-devel-2.6.32-358.23.2.el6.x86_64.rpm
• python-perf-2.6.32-358.23.2.el6.s390x.rpm
• kernel-headers-2.6.32-358.23.2.el6.i686.rpm
• kernel-debug-debuginfo-2.6.32-358.23.2.el6.x86_64.rpm
• kernel-2.6.32-358.23.2.el6.ppc64.rpm
• kernel-kdump-2.6.32-358.23.2.el6.s390x.rpm
• kernel-firmware-2.6.32-358.23.2.el6.noarch.rpm
• kernel-debug-debuginfo-2.6.32-358.23.2.el6.ppc64.rpm
• python-perf-debuginfo-2.6.32-358.23.2.el6.i686.rpm
• kernel-headers-2.6.32-358.23.2.el6.x86_64.rpm
• kernel-doc-2.6.32-358.23.2.el6.noarch.rpm
• kernel-devel-2.6.32-358.23.2.el6.i686.rpm
• kernel-devel-2.6.32-358.23.2.el6.x86_64.rpm
• python-perf-debuginfo-2.6.32-358.23.2.el6.ppc64.rpm
• kernel-debug-2.6.32-358.23.2.el6.i686.rpm
• kernel-2.6.32-358.23.2.el6.src.rpm
• perf-2.6.32-358.23.2.el6.s390x.rpm
• kernel-2.6.32-358.23.2.el6.s390x.rpm
• kernel-kdump-devel-2.6.32-358.23.2.el6.s390x.rpm
• kernel-debuginfo-2.6.32-358.23.2.el6.i686.rpm
• python-perf-2.6.32-358.23.2.el6.x86_64.rpm
• kernel-debug-devel-2.6.32-358.23.2.el6.ppc64.rpm
• kernel-headers-2.6.32-358.23.2.el6.s390x.rpm
• perf-debuginfo-2.6.32-358.23.2.el6.s390x.rpm
• perf-debuginfo-2.6.32-358.23.2.el6.x86_64.rpm
• kernel-devel-2.6.32-358.23.2.el6.s390x.rpm
• kernel-debuginfo-common-s390x-2.6.32-358.23.2.el6.s390x.rpm
• kernel-debug-2.6.32-358.23.2.el6.s390x.rpm
• kernel-debug-devel-2.6.32-358.23.2.el6.i686.rpm
• kernel-debuginfo-2.6.32-358.23.2.el6.ppc64.rpm
• kernel-debuginfo-common-i686-2.6.32-358.23.2.el6.i686.rpm
• perf-debuginfo-2.6.32-358.23.2.el6.i686.rpm
• kernel-debug-2.6.32-358.23.2.el6.ppc64.rpm
• perf-2.6.32-358.23.2.el6.ppc64.rpm
• kernel-debuginfo-2.6.32-358.23.2.el6.x86_64.rpm

Fixes

• This content is not included.BZ - 987627
• This content is not included.BZ - 1004233

CVEs

• CVE-2013-4162
• CVE-2013-4299

References

• https://access.redhat.com/security/updates/classification/#moderate
• https://access.redhat.com/site/documentation/en-US/Red_Hat_Enterprise_Linux/6/html/6.4_Technical_Notes/kernel.html

Additional information

• The Red Hat security contact is This content is not included.secalert@redhat.com. More contact details at https://access.redhat.com/security/team/contact/.
• Offline Security Data data is available for integration with other systems. See Offline Security Data API to get started.