Kernel Security Challenges and Remedies in Scientific Linux Environment

Date: Wed, 26 Sep 2012 11:29:51 -0500
Reply-To: Pat Riehecky 
Sender: Security Errata for Scientific Linux
 
From: Pat Riehecky 
Organization: Fermilab
Subject: Security ERRATA Moderate: kernel on SL6.x i386/x86_64
MIME-Version: 1.0

Synopsis: Moderate: kernel security and bug fix update
Issue Date: 2012-09-25
CVE Numbers: CVE-2012-2390
 CVE-2012-2313
 CVE-2012-3430
 CVE-2012-2384
 CVE-2012-3552

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)

This update also fixes several bugs.

Users should upgrade to these updated packages, which contain backported
patches to correct these issues, and fix the bugs noted. The system must be
rebooted for this update to take effect.

SL6
 x86_64
 kernel-2.6.32-279.9.1.el6.x86_64.rpm
 kernel-debug-2.6.32-279.9.1.el6.x86_64.rpm
 kernel-debug-devel-2.6.32-279.9.1.el6.x86_64.rpm
 kernel-devel-2.6.32-279.9.1.el6.x86_64.rpm
 kernel-headers-2.6.32-279.9.1.el6.x86_64.rpm
 perf-2.6.32-279.9.1.el6.x86_64.rpm
 python-perf-2.6.32-279.9.1.el6.x86_64.rpm
 i386
 kernel-2.6.32-279.9.1.el6.i686.rpm
 kernel-debug-2.6.32-279.9.1.el6.i686.rpm
 kernel-debug-devel-2.6.32-279.9.1.el6.i686.rpm
 kernel-devel-2.6.32-279.9.1.el6.i686.rpm
 kernel-headers-2.6.32-279.9.1.el6.i686.rpm
 perf-2.6.32-279.9.1.el6.i686.rpm
 python-perf-2.6.32-279.9.1.el6.i686.rpm
 noarch
 kernel-doc-2.6.32-279.9.1.el6.noarch.rpm
 kernel-firmware-2.6.32-279.9.1.el6.noarch.rpm

- Scientific Linux Development Team
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