USN-2037-1: Linux kernel (EC2) vulnerabilities

Ubuntu Security Notice USN-2037-1

3rd December, 2013

linux-ec2 vulnerabilities

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-ec2 - Linux kernel for EC2

Details

A flaw was discovered in the Linux kernel's KVM (kernel virtual machine).

An administrative user in the guest OS could leverage this flaw to cause a

denial of service in the host OS. (CVE-2012-2121)

Multiple integer overflow flaws where discovered in the Alchemy LCD frame-

buffer drivers in the Linux kernel. An unprivileged local user could

exploit this flaw to gain administrative privileges. (CVE-2013-4511)

Update instructions

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

Ubuntu 10.04 LTS:

linux-image-2.6.32-359-ec2 2.6.32-359.72

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-2012-2121, CVE-2013-4511

via Ubuntu Security Notices http://www.ubuntu.com/usn/usn-2037-1/