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Ubuntu 10.04 LTS USN-1271-1 Critical: Kernel Flaws Denial of Service

ubuntu
Calendar Grey November 21, 2011
Scroller Ubuntu
=========================================================================Ubuntu Security Notice USN-
Several security issues were fixed in the kernel.

Summary

Several security issues were fixed in the kernel.

Software Description:

- linux-fsl-imx51: Linux kernel for IMX51

Details:

It was discovered that CIFS incorrectly handled authentication. When a user

had a CIFS share mounted that required authentication, a local user could

mount the same share without knowing the correct password. (CVE-2011-1585)

It was discovered that the GRE protocol incorrectly handled netns

initialization. A remote attacker could send a packet while the ip_gre

module was loading, and crash the system, leading to a denial of service.

(CVE-2011-1767)

It was discovered that the IP/IP protocol incorrectly handled netns

initialization. A remote attacker could send a packet while the ipip module

was loading, and crash the system, leading to a denial of service.

(CVE-2011-1768)

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...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service ubuntu kernel flaws linux-fsl-imx51

Update Instructions

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

Ubuntu 10.04 LTS:
  linux-image-2.6.31-612-imx51    2.6.31-612.30

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-1271-1

CVE-2011-1585, CVE-2011-1767, CVE-2011-1768, CVE-2011-2491

Severity
critical
Lowest
Low
Medium
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Critical

November 21, 2011

Topics%20covered

Topics Covered

security advisory denial of service ubuntu kernel flaws linux-fsl-imx51

Package Information

https://launchpad.net/ubuntu/+source/linux-fsl-imx51/2.6.31-612.30

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