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Ubuntu 11.04 USN-1312-1 Critical: Kernel Exploit Resolution Details

ubuntu
Calendar Grey December 19, 2011
Scroller Ubuntu
Address vital kernel vulnerabilities in Ubuntu by applying prompt patches to safeguard your platform.
Several security issues were fixed in the kernel.

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)

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)

Topics%20covered

Topics Covered

security advisory denial of service update critical Ubuntu local exploit kernel

Update Instructions

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

Ubuntu 11.04:
  linux-image-2.6.38-13-generic   2.6.38-13.53
  linux-image-2.6.38-13-generic-pae  2.6.38-13.53
  linux-image-2.6.38-13-omap      2.6.38-13.53
  linux-image-2.6.38-13-powerpc   2.6.38-13.53
  linux-image-2.6.38-13-powerpc-smp  2.6.38-13.53
  linux-image-2.6.38-13-powerpc64-smp  2.6.38-13.53
  linux-image-2.6.38-13-server    2.6.38-13.53
  linux-image-2.6.38-13-versatile  2.6.38-13.53
  linux-image-2.6.38-13-virtual   2.6.38-13.53

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

References

https://ubuntu.com/security/notices/USN-1312-1

CVE-2011-4077, CVE-2011-4081, CVE-2011-4132, CVE-2011-4330

Severity
critical
Lowest
Low
Medium
High
Critical

December 19, 2011

Topics%20covered

Topics Covered

security advisory denial of service update critical Ubuntu local exploit kernel

Package Information

https://launchpad.net/ubuntu/+source/linux/2.6.38-13.53

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