USN-1661-1: Linux kernel vulnerability

Ubuntu Security Notice USN-1661-1

10th December, 2012

linux vulnerability

A security issue affects these releases of Ubuntu and its derivatives:

  • Ubuntu 10.04 LTS

Summary

The system's firewall could be bypassed by a remote attacker.

Software description

  • linux - Linux kernel

Details

Zhang Zuotao discovered a bug in the Linux kernel's handling of overlapping
fragments in ipv6. A remote attacker could exploit this flaw to bypass
firewalls and initial new network connections that should have been blocked
by the firewall.

Update instructions

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

Ubuntu 10.04 LTS:
linux-image-2.6.32-45-generic 2.6.32-45.101
linux-image-2.6.32-45-powerpc-smp 2.6.32-45.101
linux-image-2.6.32-45-ia64 2.6.32-45.101
linux-image-2.6.32-45-lpia 2.6.32-45.101
linux-image-2.6.32-45-preempt 2.6.32-45.101
linux-image-2.6.32-45-sparc64-smp 2.6.32-45.101
linux-image-2.6.32-45-virtual 2.6.32-45.101
linux-image-2.6.32-45-sparc64 2.6.32-45.101
linux-image-2.6.32-45-generic-pae 2.6.32-45.101
linux-image-2.6.32-45-server 2.6.32-45.101
linux-image-2.6.32-45-powerpc 2.6.32-45.101
linux-image-2.6.32-45-386 2.6.32-45.101
linux-image-2.6.32-45-powerpc64-smp 2.6.32-45.101
linux-image-2.6.32-45-versatile 2.6.32-45.101

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-2012-4444