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==========================================================================
Ubuntu Security Notice USN-1531-1
August 10, 2012

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

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

- Ubuntu 11.04

Summary:

Several security issues were fixed in the kernel.

Software Description:
- linux: Linux kernel

Details:

An error was discovered in the Linux kernel's network TUN/TAP device
implementation. A local user with access to the TUN/TAP interface (which is
not available to unprivileged users until granted by a root user) could
exploit this flaw to crash the system or potential gain administrative
privileges. (CVE-2012-2136)

A flaw was found in the Linux kernel's Reliable Datagram Sockets (RDS)
protocol implementation. A local, unprivileged user could use this flaw to
cause a denial of service. (CVE-2012-2372)

An error was discovered in the Linux kernel's memory subsystem (hugetlb).
An unprivileged local user could exploit this flaw to cause a denial of
service (crash the system). (CVE-2012-2390)

Update instructions:

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

Ubuntu 11.04:
  linux-image-2.6.38-15-generic   2.6.38-15.65
  linux-image-2.6.38-15-generic-pae  2.6.38-15.65
  linux-image-2.6.38-15-omap      2.6.38-15.65
  linux-image-2.6.38-15-powerpc   2.6.38-15.65
  linux-image-2.6.38-15-powerpc-smp  2.6.38-15.65
  linux-image-2.6.38-15-powerpc64-smp  2.6.38-15.65
  linux-image-2.6.38-15-server    2.6.38-15.65
  linux-image-2.6.38-15-versatile  2.6.38-15.65
  linux-image-2.6.38-15-virtual   2.6.38-15.65

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

References:
  http://www.ubuntu.com/usn/usn-1531-1
  CVE-2012-2136, CVE-2012-2372, CVE-2012-2390

Package Information:
  https://launchpad.net/ubuntu/+source/linux/2.6.38-15.65


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