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Ubuntu 10.04 LTS: Security Advisory 1301-1 Critical Kernel Issues

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Calendar Grey December 13, 2011
Scroller Ubuntu
Numerous vulnerabilities addressed in Ubuntu 10.04 LTS Linux core; essential patches and information regarding the threats released.
Several security issues were fixed in the kernel.

Summary

Several security issues were fixed in the kernel.

Software Description:

- linux-lts-backport-natty: Linux kernel backport from Natty

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 critical ubuntu linux kernel

Update Instructions

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

Ubuntu 10.04 LTS:
  linux-image-2.6.38-13-generic   2.6.38-13.53~lucid1
  linux-image-2.6.38-13-generic-pae  2.6.38-13.53~lucid1
  linux-image-2.6.38-13-server    2.6.38-13.53~lucid1
  linux-image-2.6.38-13-virtual   2.6.38-13.53~lucid1

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

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

Severity
critical
Lowest
Low
Medium
High
Critical

December 13, 2011

Topics%20covered

Topics Covered

security advisory denial of service critical ubuntu linux kernel

Package Information

https://launchpad.net/ubuntu/+source/linux-lts-backport-natty/2.6.38-13.53~lucid1

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