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Ubuntu 12.04 LTS: USN-2112-1 Critical Kernel Memory Issues

ubuntu
Calendar Grey February 18, 2014
Scroller Ubuntu
Investigate patches for Linux kernel weaknesses from USN-2112-1, improving overall system stability and security.
Several security issues were fixed in the kernel.

Summary

Several security issues were fixed in the kernel.

Software Description:

- linux-lts-raring: Linux hardware enablement kernel from Raring

Details:

Vasily Kulikov reported a flaw in the Linux kernel's implementation of

ptrace. An unprivileged local user could exploit this flaw to obtain

sensitive information from kernel memory. (CVE-2013-2929)

Dave Jones and Vince Weaver reported a flaw in the Linux kernel's perf

event subsystem that allows normal users to enable function tracing. An

unprivileged local user could exploit this flaw to obtain potentially

sensitive information from the kernel. (CVE-2013-2930)

A flaw in the handling of memory regions of the kernel virtual machine

(KVM) subsystem was discovered. A local user with the ability to assign a

device could exploit this flaw to cause a denial of service (memory

consumption). (CVE-2013-4592)

Nico Golde and Fabian Yamaguchi reported a flaw in the Linux kernel's

debugfs filesystem. An administrative loca...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service information leak Ubuntu kernel memory issue performance fix

Update Instructions

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

Ubuntu 12.04 LTS:
  linux-image-3.8.0-36-generic    3.8.0-36.52~precise1

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

https://ubuntu.com/security/notices/USN-2112-1

CVE-2013-2929, CVE-2013-2930, CVE-2013-4592, CVE-2013-6378

Severity
critical
Lowest
Low
Medium
High
Critical

February 18, 2014

Topics%20covered

Topics Covered

security advisory denial of service information leak Ubuntu kernel memory issue performance fix

Package Information

https://launchpad.net/ubuntu/+source/linux-lts-raring/3.8.0-36.52~precise1

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