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Ubuntu 10.04 LTS USN-1279-1 Moderate: Kernel Denial Of Service Threat

ubuntu
Calendar Grey November 24, 2011
Scroller Ubuntu
A series of kernel problems resolved in Ubuntu's linux-lts-backport-bionic; vital patches focused on preventing Denial of Service exploits and enhancing security.
Several security issues were fixed in the kernel.

Summary

Several security issues were fixed in the kernel.

Software Description:

- linux-lts-backport-natty: Linux kernel backport from Natty

Details:

Andrea Righi discovered a race condition in the KSM memory merging support.

If KSM was being used, a local attacker could exploit this to crash the

system, leading to a denial of service. (CVE-2011-2183)

Vasily Averin discovered that the NFS Lock Manager (NLM) incorrectly

handled unlock requests. A local attacker could exploit this to cause a

denial of service. (CVE-2011-2491)

Vasiliy Kulikov discovered that taskstats did not enforce access

restrictions. A local attacker could exploit this to read certain

information, leading to a loss of privacy. (CVE-2011-2494)

Vasiliy Kulikov discovered that /proc/PID/io did not enforce access

restrictions. A local attacker could exploit this to read certain

information, leading to a loss of privacy. (CVE-2011-2495)

It was discovered that the wireless stack incorrectly verifi...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service privacy issue kernel issue ubuntu linux-lts-backport

Update Instructions

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

Ubuntu 10.04 LTS:
  linux-image-2.6.38-13-generic   2.6.38-13.52~lucid1
  linux-image-2.6.38-13-generic-pae  2.6.38-13.52~lucid1
  linux-image-2.6.38-13-server    2.6.38-13.52~lucid1
  linux-image-2.6.38-13-virtual   2.6.38-13.52~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

https://ubuntu.com/security/notices/USN-1279-1

CVE-2011-2183, CVE-2011-2491, CVE-2011-2494, CVE-2011-2495,

CVE-2011-2517, CVE-2011-2905, CVE-2011-2909

November 24, 2011

Topics%20covered

Topics Covered

security advisory denial of service privacy issue kernel issue ubuntu linux-lts-backport

Package Information

https://launchpad.net/ubuntu/+source/linux-lts-backport-natty/2.6.38-13.52~lucid1

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