USN-1380-1: Linux kernel vulnerabilities

Ubuntu Security Notice USN-1380-1

28th February, 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


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)

Update instructions

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

Ubuntu 11.04:
linux-image-2.6.38-13-powerpc 2.6.38-13.56
linux-image-2.6.38-13-powerpc64-smp 2.6.38-13.56
linux-image-2.6.38-13-generic-pae 2.6.38-13.56
linux-image-2.6.38-13-versatile 2.6.38-13.56
linux-image-2.6.38-13-generic 2.6.38-13.56
linux-image-2.6.38-13-virtual 2.6.38-13.56
linux-image-2.6.38-13-server 2.6.38-13.56
linux-image-2.6.38-13-omap 2.6.38-13.56
linux-image-2.6.38-13-powerpc-smp 2.6.38-13.56

To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.

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

References

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