USN-1487-1: Linux kernel vulnerability

Ubuntu Security Notice USN-1487-1

29th 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 version:

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

CVE-2012-2375