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Ubuntu 10.04 LTS USN-1389-1 Critical: Kernel Access Issues and Fixes

ubuntu
Calendar Grey March 6, 2012
Scroller Ubuntu
Several vulnerabilities in Ubuntu's Linux kernel necessitate immediate updates to safeguard the system.
Several security issues were fixed in the kernel.

Summary

Several security issues were fixed in the kernel.

Software Description:

- linux: Linux kernel

Details:

Paolo Bonzini discovered a flaw in Linux's handling of the SG_IO ioctl

command. A local user, or user in a VM could exploit this flaw to bypass

restrictions and gain read/write access to all data on the affected block

device. (CVE-2011-4127)

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)

A flaw was found in KVM's Programmable Interval Timer (PIT). When a virtual

interrupt control is not available a local user could use this to cause a

denial of service by starting a timer. (CVE-2011-4622)

A flaw was discovered in the XFS filesystem. If a local user mounts a

specially crafted XFS image it could potential execute arbitrary code on

the system. (CVE-2012-0038)

Louis Rilling d...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service critical access issue Ubuntu kernel system update

Update Instructions

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

Ubuntu 10.04 LTS:
  linux-image-2.6.32-39-386       2.6.32-39.86
  linux-image-2.6.32-39-generic   2.6.32-39.86
  linux-image-2.6.32-39-generic-pae  2.6.32-39.86
  linux-image-2.6.32-39-ia64      2.6.32-39.86
  linux-image-2.6.32-39-lpia      2.6.32-39.86
  linux-image-2.6.32-39-powerpc   2.6.32-39.86
  linux-image-2.6.32-39-powerpc-smp  2.6.32-39.86
  linux-image-2.6.32-39-powerpc64-smp  2.6.32-39.86
  linux-image-2.6.32-39-preempt   2.6.32-39.86
  linux-image-2.6.32-39-server    2.6.32-39.86
  linux-image-2.6.32-39-sparc64   2.6.32-39.86
  linux-image-2.6.32-39-sparc64-smp  2.6.32-39.86
  linux-image-2.6.32-39-versatile  2.6.32-39.86
  linux-image-2.6.32-39-virtual   2.6.32-39.86

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-1389-1

CVE-2011-4127, CVE-2011-4347, CVE-2011-4622, CVE-2012-0038,

CVE-2012-0879

Severity
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Critical

March 06, 2012

Topics%20covered

Topics Covered

security advisory denial of service critical access issue Ubuntu kernel system update

Package Information

https://launchpad.net/ubuntu/+source/linux/2.6.32-39.86

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