linux vulnerability

27 March 2012

linux vulnerability

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

• Ubuntu 10.04 LTS

Summary

The system could be made to crash under certain conditions.

Software Description

• linux - Linux kernel

Details

Louis Rilling discovered a flaw in Linux kernel’s clone command when CLONE_IO is specified. An unprivileged local user could exploit this to cause a denial of service.

Update instructions

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

Ubuntu 10.04 LTS

linux-image-2.6.32-40-386 - 2.6.32-40.87

linux-image-2.6.32-40-generic - 2.6.32-40.87

linux-image-2.6.32-40-generic-pae - 2.6.32-40.87

linux-image-2.6.32-40-ia64 - 2.6.32-40.87

linux-image-2.6.32-40-lpia - 2.6.32-40.87

linux-image-2.6.32-40-powerpc - 2.6.32-40.87

linux-image-2.6.32-40-powerpc-smp - 2.6.32-40.87

linux-image-2.6.32-40-powerpc64-smp - 2.6.32-40.87

linux-image-2.6.32-40-preempt - 2.6.32-40.87

linux-image-2.6.32-40-server - 2.6.32-40.87

linux-image-2.6.32-40-sparc64 - 2.6.32-40.87

linux-image-2.6.32-40-sparc64-smp - 2.6.32-40.87

linux-image-2.6.32-40-versatile - 2.6.32-40.87

linux-image-2.6.32-40-virtual - 2.6.32-40.87

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-2012-0879