[USN-1597-1] Linux kernel (EC2) vulnerability

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Ubuntu Security Notice USN-1597-1
October 05, 2012

linux-ec2 vulnerability
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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-ec2: Linux kernel for EC2

Details:

A flaw was found in how the Linux kernel passed the replacement session
keyring to a child process. An unprivileged local user could exploit this
flaw to cause a denial of service (panic).



Update instructions:

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

Ubuntu 10.04 LTS:
linux-image-2.6.32-349-ec2 2.6.32-349.55

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-1597-1
CVE-2012-2745

Package Information:
https://launchpad.net/ubuntu/+source/linux-ec2/2.6.32-349.55