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.
Updated packages are available from security.ubuntu.com.
========================================================================== Ubuntu Security Notice USN-1661-1 December 11, 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 versions: Ubuntu 10.04 LTS: linux-image-2.6.32-45-386 2.6.32-45.101 linux-image-2.6.32-45-generic 2.6.32-45.101 linux-image-2.6.32-45-generic-pae 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-powerpc 2.6.32-45.101 linux-image-2.6.32-45-powerpc-smp 2.6.32-45.101 linux-image-2.6.32-45-powerpc64-smp 2.6.32-45.101 linux-image-2.6.32-45-preempt 2.6.32-45.101 linux-image-2.6.32-45-server 2.6.32-45.101 linux-image-2.6.32-45-sparc64 2.6.32-45.101 linux-image-2.6.32-45-sparc64-smp 2.6.32-45.101 linux-image-2.6.32-45-versatile 2.6.32-45.101 linux-image-2.6.32-45-virtual 2.6.32-45.101 After a standard system update you need to reboot your computer to make all the necessary changes. References: http://www.ubuntu.com/usn/usn-1661-1 CVE-2012-4444 Package Information: https://launchpad.net/ubuntu/+source/linux/2.6.32-45.101