linux vulnerabilities

29 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 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

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