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==========================================================================
Ubuntu Security Notice USN-1272-1
November 21, 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:

It was discovered that CIFS incorrectly handled authentication. When a user
had a CIFS share mounted that required authentication, a local user could
mount the same share without knowing the correct password. (CVE-2011-1585)

Andrea Righi discovered a race condition in the KSM memory merging support.
If KSM was being used, a local attacker could exploit this to crash the
system, leading to a denial of service. (CVE-2011-2183)

Vasily Averin discovered that the NFS Lock Manager (NLM) incorrectly
handled unlock requests. A local attacker could exploit this to cause a
denial of service. (CVE-2011-2491)

Robert Swiecki discovered that mapping extensions were incorrectly handled.
A local attacker could exploit this to crash the system, leading to a
denial of service. (CVE-2011-2496)

It was discovered that the wireless stack incorrectly verified SSID
lengths. A local attacker could exploit this to cause a denial of service
or gain root privileges. (CVE-2011-2517)

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   2.6.35-31.62
  linux-image-2.6.35-31-generic-pae  2.6.35-31.62
  linux-image-2.6.35-31-omap      2.6.35-31.62
  linux-image-2.6.35-31-powerpc   2.6.35-31.62
  linux-image-2.6.35-31-powerpc-smp  2.6.35-31.62
  linux-image-2.6.35-31-powerpc64-smp  2.6.35-31.62
  linux-image-2.6.35-31-server    2.6.35-31.62
  linux-image-2.6.35-31-versatile  2.6.35-31.62
  linux-image-2.6.35-31-virtual   2.6.35-31.62

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

ATTENTION: Due to an unavoidable ABI change the kernel updates have
been given a new version number, which requires you to recompile and
reinstall all third party kernel modules you might have installed. If
you use linux-restricted-modules, you have to update that package as
well to get modules which work with the new kernel version. Unless you
manually uninstalled the standard kernel metapackages (e.g. linux-generic,
linux-server, linux-powerpc), a standard system upgrade will automatically
perform this as well.

References:
  http://www.ubuntu.com/usn/usn-1272-1
  CVE-2011-1585, CVE-2011-2183, CVE-2011-2491, CVE-2011-2496,
  CVE-2011-2517

Package Information:
  https://launchpad.net/ubuntu/+source/linux/2.6.35-31.62



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