7.2 - USN-1455-1

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

- Ubuntu 10.04 LTS

Summary:

Several security issues were fixed in the kernel.

Software Description: - linux-lts-backport-oneiric: Linux kernel backport from Oneiric

Details:

A flaw was found in the Linux kernel's KVM (Kernel Virtual Machine) virtual cpu setup. An unprivileged local user could exploit this flaw to crash the system leading to a denial of service. (CVE-2012-1601)

Steve Grubb reported a flaw with Linux fscaps (file system base capabilities) when used to increase the permissions of a process. For application on which fscaps are in use a local attacker can disable address space randomization to make attacking the process with raised privileges easier. (CVE-2012-2123)

Update instructions:

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

Ubuntu 10.04 LTS:
linux-image-3.0.0-20-generic 3.0.0-20.34~lucid1
linux-image-3.0.0-20-generic-pae 3.0.0-20.34~lucid1
linux-image-3.0.0-20-server 3.0.0-20.34~lucid1
linux-image-3.0.0-20-virtual 3.0.0-20.34~lucid1

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:
http://www.ubuntu.com/usn/usn-1455-1
CVE-2012-1601, CVE-2012-2123

Package Information:
https://launchpad.net/ubuntu/+source/linux-lts-backport-oneiric/3.0.0-20.34~lucid1