USN-1487-1: Linux kernel vulnerability

29 June 2012

linux vulnerability

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

  • Ubuntu 11.10

Summary

The system could be made to crash if it received specially crafted network traffic.

Software Description

  • linux - Linux kernel

Details

A flaw was discovered in the Linux kernel’s NFSv4 (Network file system) handling of ACLs (access control lists). A remote NFS server (attacker) could cause a denial of service (OOPS).

Update instructions

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

Ubuntu 11.10
linux-image-3.0.0-22-generic - 3.0.0-22.36
linux-image-3.0.0-22-generic-pae - 3.0.0-22.36
linux-image-3.0.0-22-omap - 3.0.0-22.36
linux-image-3.0.0-22-powerpc - 3.0.0-22.36
linux-image-3.0.0-22-powerpc-smp - 3.0.0-22.36
linux-image-3.0.0-22-powerpc64-smp - 3.0.0-22.36
linux-image-3.0.0-22-server - 3.0.0-22.36
linux-image-3.0.0-22-virtual - 3.0.0-22.36

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.

ATTENTION: Due to an unavoidable ABI change the kernel updates have been given a new version number, which requires you to recompile and reinstall all third party kernel modules you might have installed. If you use linux-restricted-modules, you have to update that package as well to get modules which work with the new kernel version. Unless you manually uninstalled the standard kernel metapackages (e.g. linux-generic, linux-server, linux-powerpc), a standard system upgrade will automatically perform this as well.

References