Scientific Linux: 2012-01-10 Important Kernel Update for Security

Date: Thu, 12 Jan 2012 11:16:09 -0600
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Sender: Security Errata for Scientific Linux
 
From: Patrick Riehecky 
Subject: Security ERRATA Important: kernel on SL5.x i386/x86_64
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Synopsis: Important: kernel security, bug fix, and enhancement update
Issue Date: 2012-01-10
CVE Numbers: CVE-2011-1020
 CVE-2011-3637
 CVE-2011-4077
 CVE-2011-4132
 CVE-2011-4330
 CVE-2011-4324
 CVE-2011-4325
 CVE-2011-4348

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

This update fixes the following security issues:

* A buffer overflow flaw was found in the way the Linux kernel's XFS file
system implementation handled links with overly long path names. A local,
unprivileged user could use this flaw to cause a denial of service or
escalate their privileges by mounting a specially-crafted disk.
(CVE-2011-4077, Important)

* The fix for CVE-2011-2482 provided by a previous update introduced a
regression: on systems that do not have Security-Enhanced Linux (SELinux)
in Enforcing mode, a socket lock race could occur between sctp_rcv() and
sctp_accept(). A remote attacker could use this flaw to cause a denial of
service. By default, SELinux runs in Enforcing mode on Scientific
Linux 5. (CVE-2011-4348, Important)

* The proc file system could allow a local, unprivileged user to obtain
sensitive information or possibly cause integrity issues. (CVE-2011-1020,
Moderate)

* A missing validation flaw was found in the Linux kernel's m_stop()
implementation. A local, unprivileged user could use this flaw to trigger a
denial of service. (CVE-2011-3637, Moderate)

* A flaw was found in the Linux kernel's Journaling Block Device (JBD).
A local attacker could use this flaw to crash the system by mounting a
specially-crafted ext3 or ext4 disk. (CVE-2011-4132, Moderate)

* A flaw was found in the Linux kernel's encode_share_access()
implementation. A local, unprivileged user could use this flaw to trigger a
denial of service by creating a regular file on an NFSv4 (Network File
System version 4) file system via mknod(). (CVE-2011-4324, Moderate)

* A flaw was found in the Linux kernel's NFS implementation. A local,
unprivileged user could use this flaw to cause a denial of service.
(CVE-2011-4325, Moderate)

* A missing boundary check was found in the Linux kernel's HFS file system
implementation. A local attacker could use this flaw to cause a denial of
service or escalate their privileges by mounting a specially-crafted disk.
(CVE-2011-4330, Moderate)

This update also fixes several bugs and adds one enhancement.

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

SL5:
 i386
 kernel-2.6.18-274.17.1.el5.i686.rpm
 kernel-debug-2.6.18-274.17.1.el5.i686.rpm
 kernel-debug-debuginfo-2.6.18-274.17.1.el5.i686.rpm
 kernel-debug-devel-2.6.18-274.17.1.el5.i686.rpm
 kernel-debuginfo-2.6.18-274.17.1.el5.i686.rpm
 kernel-debuginfo-common-2.6.18-274.17.1.el5.i686.rpm
 kernel-devel-2.6.18-274.17.1.el5.i686.rpm
 kernel-headers-2.6.18-274.17.1.el5.i386.rpm
 kernel-PAE-2.6.18-274.17.1.el5.i686.rpm
 kernel-PAE-debuginfo-2.6.18-274.17.1.el5.i686.rpm
 kernel-PAE-devel-2.6.18-274.17.1.el5.i686.rpm
 kernel-xen-2.6.18-274.17.1.el5.i686.rpm
 kernel-xen-debuginfo-2.6.18-274.17.1.el5.i686.rpm
 kernel-xen-devel-2.6.18-274.17.1.el5.i686.rpm
 noarch
 kernel-doc-2.6.18-274.17.1.el5.noarch.rpm
 x86_64
 kernel-2.6.18-274.17.1.el5.x86_64.rpm
 kernel-debug-2.6.18-274.17.1.el5.x86_64.rpm
 kernel-debug-debuginfo-2.6.18-274.17.1.el5.x86_64.rpm
 kernel-debug-devel-2.6.18-274.17.1.el5.x86_64.rpm
 kernel-debuginfo-2.6.18-274.17.1.el5.x86_64.rpm
 kernel-debuginfo-common-2.6.18-274.17.1.el5.x86_64.rpm
 kernel-devel-2.6.18-274.17.1.el5.x86_64.rpm
 kernel-headers-2.6.18-274.17.1.el5.x86_64.rpm
 kernel-xen-2.6.18-274.17.1.el5.x86_64.rpm
 kernel-xen-debuginfo-2.6.18-274.17.1.el5.x86_64.rpm
 kernel-xen-devel-2.6.18-274.17.1.el5.x86_64.rpm

- Scientific Linux Development Team