Audit Linux privileges now to limit compromise, escalation, and system-wide damage. Review Linux Privileges×

Alerts This Week
Warning Icon 1 514
Alerts This Week
Warning Icon 1 514

Ubuntu 11.04: USN-1422-1 Critical: Linux Kernel Denial Of Service

ubuntu
Calendar Grey April 12, 2012
Scroller Ubuntu
Address vulnerabilities within the Ubuntu 11.04 kernel to reduce system instability and service interruptions. Important patches released.
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 security update critical ubuntu system crash linux kernel

Update Instructions

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

Ubuntu 11.04:
  linux-image-2.6.38-14-generic   2.6.38-14.58
  linux-image-2.6.38-14-generic-pae  2.6.38-14.58
  linux-image-2.6.38-14-omap      2.6.38-14.58
  linux-image-2.6.38-14-powerpc   2.6.38-14.58
  linux-image-2.6.38-14-powerpc-smp  2.6.38-14.58
  linux-image-2.6.38-14-powerpc64-smp  2.6.38-14.58
  linux-image-2.6.38-14-server    2.6.38-14.58
  linux-image-2.6.38-14-versatile  2.6.38-14.58
  linux-image-2.6.38-14-virtual   2.6.38-14.58

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-1422-1

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

Severity
critical
Lowest
Low
Medium
High
Critical

April 12, 2012

Topics%20covered

Topics Covered

security advisory denial of service security update critical ubuntu system crash linux kernel

Package Information

https://launchpad.net/ubuntu/+source/linux/2.6.38-14.58

Get the latest News and Insights

Get the latest Linux and open source security news straight to your inbox.