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Alerts This Week
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Ubuntu 11.04: USN-1432-1 Critical: Kernel Denial Of Service Threat

ubuntu
Calendar Grey May 8, 2012
Scroller Ubuntu
Explore the details of Debian Security Advisories DSA-2578-1 targeting vulnerabilities in the kernel to mitigate potential denial of service threats.
Several security issues were fixed in the kernel.

Summary

Several security issues were fixed in the kernel.

Software Description:

- linux: Linux kernel

Details:

A flaw was found in the Linux's kernels ext4 file system when mounted with

a journal. A local, unprivileged user could exploit this flaw to cause a

denial of service. (CVE-2011-4086)

A flaw was discovered in the Linux kernel's cifs file system. An

unprivileged local user could exploit this flaw to crash the system leading

to a denial of service. (CVE-2012-1090)

A flaw was found in the Linux kernel's ext4 file system when mounting a

corrupt filesystem. A user-assisted remote attacker could exploit this flaw

to cause a denial of service. (CVE-2012-2100)

Topics%20covered

Topics Covered

security advisory denial of service critical ubuntu kernel issues

Update Instructions

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

Ubuntu 11.04:
  linux-image-2.6.38-15-generic   2.6.38-15.59
  linux-image-2.6.38-15-generic-pae  2.6.38-15.59
  linux-image-2.6.38-15-omap      2.6.38-15.59
  linux-image-2.6.38-15-powerpc   2.6.38-15.59
  linux-image-2.6.38-15-powerpc-smp  2.6.38-15.59
  linux-image-2.6.38-15-powerpc64-smp  2.6.38-15.59
  linux-image-2.6.38-15-server    2.6.38-15.59
  linux-image-2.6.38-15-versatile  2.6.38-15.59
  linux-image-2.6.38-15-virtual   2.6.38-15.59

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-1432-1

CVE-2011-4086, CVE-2012-1090, CVE-2012-2100

Severity
critical
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Critical

May 08, 2012

Topics%20covered

Topics Covered

security advisory denial of service critical ubuntu kernel issues

Package Information

https://launchpad.net/ubuntu/+source/linux/2.6.38-15.59

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