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Ubuntu 11.04: USN-1406-1 Important: Critical Kernel Crash Problems

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Calendar Grey March 27, 2012
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: Linux kernel

Details:

Sasha Levin discovered a flaw in the permission checking for device

assignments requested via the kvm ioctl in the Linux kernel. A local user

could use this flaw to crash the system causing a denial of service.

(CVE-2011-4347)

Stephan Bärwolf discovered a flaw in the KVM (kernel-based virtual

machine) subsystem of the Linux kernel. A local unprivileged user can crash

use this flaw to crash VMs causing a deny of service. (CVE-2012-0045)

H. Peter Anvin reported a flaw in the Linux kernel that could crash the

system. A local user could exploit this flaw to crash the system.

(CVE-2012-1097)

A flaw was discovered in the Linux kernel's cgroups subset. A local

attacker could use this flaw to crash the system. (CVE-2012-1146)

Topics%20covered

Topics Covered

security advisory denial of service critical issue kernel ubuntu

Update Instructions

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

Ubuntu 11.04:
  linux-image-2.6.38-13-generic   2.6.38-13.57
  linux-image-2.6.38-13-generic-pae  2.6.38-13.57
  linux-image-2.6.38-13-omap      2.6.38-13.57
  linux-image-2.6.38-13-powerpc   2.6.38-13.57
  linux-image-2.6.38-13-powerpc-smp  2.6.38-13.57
  linux-image-2.6.38-13-powerpc64-smp  2.6.38-13.57
  linux-image-2.6.38-13-server    2.6.38-13.57
  linux-image-2.6.38-13-versatile  2.6.38-13.57
  linux-image-2.6.38-13-virtual   2.6.38-13.57

After a standard system update you need to reboot your computer to make
all the necessary changes.

References

https://ubuntu.com/security/notices/USN-1406-1

CVE-2011-4347, CVE-2012-0045, CVE-2012-1097, CVE-2012-1146

Severity
important
Lowest
Low
Medium
High
Critical

March 27, 2012

Topics%20covered

Topics Covered

security advisory denial of service critical issue kernel ubuntu

Package Information

https://launchpad.net/ubuntu/+source/linux/2.6.38-13.57

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