Issued:

2013-12-12

Updated:

2013-12-12

RHSA-2013:1801 - Important: kernel security, bug fix, and enhancement update

Synopsis

Important: kernel security, bug fix, and enhancement update

Type/Severity

Security Advisory Important

Topic

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

The Red Hat Security Response Team has rated this update as having important 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 sending of certain UDP packets over sockets that used the UDP_CORK option when the UDP Fragmentation Offload (UFO) feature was enabled on the output device. A local, unprivileged user could use this flaw to cause a denial of service or, potentially, escalate their privileges on the system. (CVE-2013-4470, Important)

• A divide-by-zero flaw was found in the apic_get_tmcct() function in KVM's Local Advanced Programmable Interrupt Controller (LAPIC) implementation. A privileged guest user could use this flaw to crash the host. (CVE-2013-6367, Important)

• A memory corruption flaw was discovered in the way KVM handled virtual APIC accesses that crossed a page boundary. A local, unprivileged user could use this flaw to crash the system or, potentially, escalate their privileges on the system. (CVE-2013-6368, Important)

• An information leak flaw in the Linux kernel could allow a local, unprivileged user to leak kernel memory to user space. (CVE-2013-2141, Low)

Red Hat would like to thank Hannes Frederic Sowa for reporting CVE-2013-4470, and Andrew Honig of Google for reporting CVE-2013-6367 and CVE-2013-6368.

This update also fixes several bugs and adds two enhancements. 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 and add these enhancements. 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

• python-perf-2.6.32-431.1.2.el6.ppc64.rpm
• kernel-devel-2.6.32-431.1.2.el6.ppc64.rpm
• kernel-debuginfo-2.6.32-431.1.2.el6.s390x.rpm
• kernel-debug-devel-2.6.32-431.1.2.el6.s390x.rpm
• python-perf-2.6.32-431.1.2.el6.i686.rpm
• kernel-debug-2.6.32-431.1.2.el6.i686.rpm
• kernel-debuginfo-common-x86_64-2.6.32-431.1.2.el6.x86_64.rpm
• python-perf-2.6.32-431.1.2.el6.x86_64.rpm
• kernel-abi-whitelists-2.6.32-431.1.2.el6.noarch.rpm
• perf-debuginfo-2.6.32-431.1.2.el6.ppc64.rpm
• kernel-debug-devel-2.6.32-431.1.2.el6.ppc64.rpm
• python-perf-debuginfo-2.6.32-431.1.2.el6.s390x.rpm
• kernel-headers-2.6.32-431.1.2.el6.s390x.rpm
• kernel-bootwrapper-2.6.32-431.1.2.el6.ppc64.rpm
• perf-2.6.32-431.1.2.el6.i686.rpm
• perf-debuginfo-2.6.32-431.1.2.el6.s390x.rpm
• perf-2.6.32-431.1.2.el6.s390x.rpm
• kernel-debuginfo-2.6.32-431.1.2.el6.ppc64.rpm
• kernel-devel-2.6.32-431.1.2.el6.x86_64.rpm
• kernel-doc-2.6.32-431.1.2.el6.noarch.rpm
• perf-2.6.32-431.1.2.el6.ppc64.rpm
• kernel-debug-debuginfo-2.6.32-431.1.2.el6.s390x.rpm
• python-perf-2.6.32-431.1.2.el6.s390x.rpm
• kernel-kdump-2.6.32-431.1.2.el6.s390x.rpm
• kernel-headers-2.6.32-431.1.2.el6.i686.rpm
• kernel-devel-2.6.32-431.1.2.el6.s390x.rpm
• perf-debuginfo-2.6.32-431.1.2.el6.i686.rpm
• kernel-debug-debuginfo-2.6.32-431.1.2.el6.i686.rpm
• kernel-debug-2.6.32-431.1.2.el6.s390x.rpm
• kernel-headers-2.6.32-431.1.2.el6.ppc64.rpm
• kernel-debug-2.6.32-431.1.2.el6.ppc64.rpm
• kernel-debuginfo-common-ppc64-2.6.32-431.1.2.el6.ppc64.rpm
• kernel-debuginfo-2.6.32-431.1.2.el6.x86_64.rpm
• kernel-2.6.32-431.1.2.el6.src.rpm
• kernel-debuginfo-2.6.32-431.1.2.el6.i686.rpm
• kernel-headers-2.6.32-431.1.2.el6.x86_64.rpm
• perf-2.6.32-431.1.2.el6.x86_64.rpm
• perf-debuginfo-2.6.32-431.1.2.el6.x86_64.rpm
• kernel-debug-debuginfo-2.6.32-431.1.2.el6.ppc64.rpm
• python-perf-debuginfo-2.6.32-431.1.2.el6.i686.rpm
• kernel-debuginfo-common-i686-2.6.32-431.1.2.el6.i686.rpm
• kernel-devel-2.6.32-431.1.2.el6.i686.rpm
• kernel-2.6.32-431.1.2.el6.ppc64.rpm
• kernel-debuginfo-common-s390x-2.6.32-431.1.2.el6.s390x.rpm
• kernel-debug-devel-2.6.32-431.1.2.el6.x86_64.rpm
• kernel-2.6.32-431.1.2.el6.x86_64.rpm
• kernel-debug-debuginfo-2.6.32-431.1.2.el6.x86_64.rpm
• kernel-2.6.32-431.1.2.el6.i686.rpm
• python-perf-debuginfo-2.6.32-431.1.2.el6.x86_64.rpm
• kernel-2.6.32-431.1.2.el6.s390x.rpm
• kernel-kdump-debuginfo-2.6.32-431.1.2.el6.s390x.rpm
• kernel-firmware-2.6.32-431.1.2.el6.noarch.rpm
• kernel-debug-2.6.32-431.1.2.el6.x86_64.rpm
• kernel-debug-devel-2.6.32-431.1.2.el6.i686.rpm
• kernel-kdump-devel-2.6.32-431.1.2.el6.s390x.rpm
• python-perf-debuginfo-2.6.32-431.1.2.el6.ppc64.rpm

Fixes

• This content is not included.BZ - 970873
• This content is not included.BZ - 1023477
• This content is not included.BZ - 1032207
• This content is not included.BZ - 1032210

CVEs

• CVE-2013-2141
• CVE-2013-6367
• CVE-2013-4470
• CVE-2013-6368

References

• https://access.redhat.com/security/updates/classification/#important
• https://access.redhat.com/site/documentation/en-US/Red_Hat_Enterprise_Linux/6/html/6.5_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.