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Ubuntu 11.04: USN-1380-1 Moderate Denial Of Service in Linux Kernel

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Calendar Grey February 29, 2012
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Multiple vulnerabilities within the kernel have been addressed through patches for Ubuntu 11.04. Essential updates and resolutions are now accessible!
Several security issues were fixed in the kernel.

Summary

Several security issues were fixed in the kernel.

Software Description:

- linux: Linux kernel

Details:

The linux kernel did not properly account for PTE pages when deciding which

task to kill in out of memory conditions. A local, unprivileged could

exploit this flaw to cause a denial of service. (CVE-2011-2498)

A flaw was discovered in the TOMOYO LSM's handling of mount system calls.

An unprivileged user could oops the system causing a denial of service.

(CVE-2011-2518)

A bug was discovered in the Linux kernel's calculation of OOM (Out of

memory) scores, that would result in the wrong process being killed. A user

could use this to kill the process with the highest OOM score, even if that

process belongs to another user or the system. (CVE-2011-4097)

A flaw was found in the linux kernels IPv4 IGMP query processing. A remote

attacker could exploit this to cause a denial of service. (CVE-2012-0207)

Topics%20covered

Topics Covered

security advisory moderate denial of service kernel ubuntu linux

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   2.6.38-13.56
  linux-image-2.6.38-13-generic-pae  2.6.38-13.56
  linux-image-2.6.38-13-omap      2.6.38-13.56
  linux-image-2.6.38-13-powerpc   2.6.38-13.56
  linux-image-2.6.38-13-powerpc-smp  2.6.38-13.56
  linux-image-2.6.38-13-powerpc64-smp  2.6.38-13.56
  linux-image-2.6.38-13-server    2.6.38-13.56
  linux-image-2.6.38-13-versatile  2.6.38-13.56
  linux-image-2.6.38-13-virtual   2.6.38-13.56

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

References

https://ubuntu.com/security/notices/USN-1380-1

CVE-2011-2498, CVE-2011-2518, CVE-2011-4097, CVE-2012-0207

Severity
important
Lowest
Low
Medium
High
Critical

February 29, 2012

Topics%20covered

Topics Covered

security advisory moderate denial of service kernel ubuntu linux

Package Information

https://launchpad.net/ubuntu/+source/linux/2.6.38-13.56

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