Issued:

2012-09-25

Updated:

2012-09-25

RHSA-2012:1304 - 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 multiple 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.

This update fixes the following security issues:

• An integer overflow flaw was found in the i915_gem_do_execbuffer() function in the Intel i915 driver in the Linux kernel. A local, unprivileged user could use this flaw to cause a denial of service. This issue only affected 32-bit systems. (CVE-2012-2384, Moderate)

• A memory leak flaw was found in the way the Linux kernel's memory subsystem handled resource clean up in the mmap() failure path when the MAP_HUGETLB flag was set. A local, unprivileged user could use this flaw to cause a denial of service. (CVE-2012-2390, Moderate)

• A race condition was found in the way access to inet->opt ip_options was synchronized in the Linux kernel's TCP/IP protocol suite implementation. Depending on the network facing applications running on the system, a remote attacker could possibly trigger this flaw to cause a denial of service. A local, unprivileged user could use this flaw to cause a denial of service regardless of the applications the system runs. (CVE-2012-3552, Moderate)

• A flaw was found in the way the Linux kernel's dl2k driver, used by certain D-Link Gigabit Ethernet adapters, restricted IOCTLs. A local, unprivileged user could use this flaw to issue potentially harmful IOCTLs, which could cause Ethernet adapters using the dl2k driver to malfunction (for example, losing network connectivity). (CVE-2012-2313, Low)

• A flaw was found in the way the msg_namelen variable in the rds_recvmsg() function of the Linux kernel's Reliable Datagram Sockets (RDS) protocol implementation was initialized. A local, unprivileged user could use this flaw to leak kernel stack memory to user-space. (CVE-2012-3430, Low)

Red Hat would like to thank Hafid Lin for reporting CVE-2012-3552, and Stephan Mueller for reporting CVE-2012-2313. The CVE-2012-3430 issue was discovered by the Red Hat InfiniBand team.

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, and fix the bugs noted in the Technical Notes. 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/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.

Affected Products

Updated Packages

• kernel-doc-2.6.32-279.9.1.el6.noarch.rpm
• kernel-debuginfo-common-x86_64-2.6.32-279.9.1.el6.x86_64.rpm
• python-perf-2.6.32-279.9.1.el6.ppc64.rpm
• kernel-headers-2.6.32-279.9.1.el6.i686.rpm
• kernel-debug-2.6.32-279.9.1.el6.x86_64.rpm
• kernel-debug-debuginfo-2.6.32-279.9.1.el6.ppc64.rpm
• kernel-kdump-debuginfo-2.6.32-279.9.1.el6.s390x.rpm
• python-perf-2.6.32-279.9.1.el6.i686.rpm
• python-perf-2.6.32-279.9.1.el6.s390x.rpm
• kernel-headers-2.6.32-279.9.1.el6.ppc64.rpm
• kernel-debuginfo-2.6.32-279.9.1.el6.ppc64.rpm
• perf-2.6.32-279.9.1.el6.x86_64.rpm
• kernel-debuginfo-common-s390x-2.6.32-279.9.1.el6.s390x.rpm
• kernel-kdump-devel-2.6.32-279.9.1.el6.s390x.rpm
• kernel-debug-2.6.32-279.9.1.el6.s390x.rpm
• kernel-firmware-2.6.32-279.9.1.el6.noarch.rpm
• kernel-debuginfo-2.6.32-279.9.1.el6.x86_64.rpm
• perf-debuginfo-2.6.32-279.9.1.el6.ppc64.rpm
• kernel-2.6.32-279.9.1.el6.s390x.rpm
• perf-debuginfo-2.6.32-279.9.1.el6.i686.rpm
• kernel-2.6.32-279.9.1.el6.i686.rpm
• kernel-2.6.32-279.9.1.el6.src.rpm
• perf-debuginfo-2.6.32-279.9.1.el6.x86_64.rpm
• perf-2.6.32-279.9.1.el6.ppc64.rpm
• kernel-kdump-2.6.32-279.9.1.el6.s390x.rpm
• kernel-debuginfo-common-i686-2.6.32-279.9.1.el6.i686.rpm
• kernel-debug-debuginfo-2.6.32-279.9.1.el6.i686.rpm
• kernel-devel-2.6.32-279.9.1.el6.x86_64.rpm
• kernel-debug-2.6.32-279.9.1.el6.ppc64.rpm
• kernel-debuginfo-2.6.32-279.9.1.el6.s390x.rpm
• kernel-debug-devel-2.6.32-279.9.1.el6.s390x.rpm
• kernel-devel-2.6.32-279.9.1.el6.s390x.rpm
• kernel-devel-2.6.32-279.9.1.el6.ppc64.rpm
• kernel-debuginfo-2.6.32-279.9.1.el6.i686.rpm
• kernel-debug-devel-2.6.32-279.9.1.el6.ppc64.rpm
• python-perf-debuginfo-2.6.32-279.9.1.el6.x86_64.rpm
• python-perf-debuginfo-2.6.32-279.9.1.el6.i686.rpm
• kernel-headers-2.6.32-279.9.1.el6.x86_64.rpm
• kernel-debug-devel-2.6.32-279.9.1.el6.x86_64.rpm
• perf-debuginfo-2.6.32-279.9.1.el6.s390x.rpm
• kernel-debug-debuginfo-2.6.32-279.9.1.el6.s390x.rpm
• kernel-debug-devel-2.6.32-279.9.1.el6.i686.rpm
• kernel-2.6.32-279.9.1.el6.x86_64.rpm
• python-perf-debuginfo-2.6.32-279.9.1.el6.s390x.rpm
• python-perf-debuginfo-2.6.32-279.9.1.el6.ppc64.rpm
• kernel-devel-2.6.32-279.9.1.el6.i686.rpm
• kernel-debug-debuginfo-2.6.32-279.9.1.el6.x86_64.rpm
• kernel-debug-2.6.32-279.9.1.el6.i686.rpm
• kernel-2.6.32-279.9.1.el6.ppc64.rpm
• perf-2.6.32-279.9.1.el6.i686.rpm
• kernel-debuginfo-common-ppc64-2.6.32-279.9.1.el6.ppc64.rpm
• kernel-headers-2.6.32-279.9.1.el6.s390x.rpm
• perf-2.6.32-279.9.1.el6.s390x.rpm
• kernel-bootwrapper-2.6.32-279.9.1.el6.ppc64.rpm
• python-perf-2.6.32-279.9.1.el6.x86_64.rpm

Fixes

• This content is not included.BZ - 818820
• This content is not included.BZ - 820039
• This content is not included.BZ - 824178
• This content is not included.BZ - 824345
• This content is not included.BZ - 842982
• This content is not included.BZ - 847945
• This content is not included.BZ - 849051
• This content is not included.BZ - 851444
• This content is not included.BZ - 853465

CVEs

• CVE-2012-2390
• CVE-2012-2313
• CVE-2012-3552
• CVE-2012-2384
• CVE-2012-3430

References

• https://access.redhat.com/security/updates/classification/#moderate
• This content is not included.This content is not included.https://access.redhat.com/knowledge/docs/en-US/Red_Hat_Enterprise_Linux/6/html/6.3_Technical_Notes/kernel.html#RHSA-2012-1304

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.