[USN-1293-1] Linux kernel vulnerabilities

John Johansen john.johansen at canonical.com
Thu Dec 8 11:39:50 UTC 2011


==========================================================================
Ubuntu Security Notice USN-1293-1
December 08, 2011

linux vulnerabilities
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 10.10

Summary:

Several security issues were fixed in the kernel.

Software Description:
- linux: Linux kernel

Details:

A bug was discovered in the XFS filesystem's handling of pathnames. A local
attacker could exploit this to crash the system, leading to a denial of
service, or gain root privileges. (CVE-2011-4077)

Nick Bowler discovered the kernel GHASH message digest algorithm
incorrectly handled error conditions. A local attacker could exploit this
to cause a kernel oops. (CVE-2011-4081)

A flaw was found in the Journaling Block Device (JBD). A local attacker
able to mount ext3 or ext4 file systems could exploit this to crash the
system, leading to a denial of service. (CVE-2011-4132)

A bug was found in the way headroom check was performed in
udp6_ufo_fragment() function. A remote attacker could use this flaw to
crash the system. (CVE-2011-4326)

Clement Lecigne discovered a bug in the HFS file system bounds checking.
When a malformed HFS file system is mounted a local user could crash the
system or gain root privileges. (CVE-2011-4330)

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 10.10:
  linux-image-2.6.35-31-generic   2.6.35-31.63
  linux-image-2.6.35-31-generic-pae  2.6.35-31.63
  linux-image-2.6.35-31-omap      2.6.35-31.63
  linux-image-2.6.35-31-powerpc   2.6.35-31.63
  linux-image-2.6.35-31-powerpc-smp  2.6.35-31.63
  linux-image-2.6.35-31-powerpc64-smp  2.6.35-31.63
  linux-image-2.6.35-31-server    2.6.35-31.63
  linux-image-2.6.35-31-versatile  2.6.35-31.63
  linux-image-2.6.35-31-virtual   2.6.35-31.63

After a standard system update you need to reboot your computer to make
all the necessary changes.

References:
  http://www.ubuntu.com/usn/usn-1293-1
  CVE-2011-4077, CVE-2011-4081, CVE-2011-4132, CVE-2011-4326,
  CVE-2011-4330

Package Information:
  https://launchpad.net/ubuntu/+source/linux/2.6.35-31.63


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