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Ubuntu 11.04 USN-1193-1 Critical: Kernel Flaws Cause DoS Threat

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Calendar Grey August 19, 2011
Scroller Ubuntu
To safeguard against kernel vulnerabilities in Ubuntu 11.04, perform systematic evaluations and implement strategic patches while checking for updates regularly.
Multiple kernel flaws have been fixed.

Summary

Multiple kernel flaws have been fixed.

Software Description:

- linux: Linux kernel

Details:

Timo Warns discovered that the GUID partition parsing routines did not

correctly validate certain structures. A local attacker with physical

access could plug in a specially crafted block device to crash the system,

leading to a denial of service. (CVE-2011-1577)

Phil Oester discovered that the network bonding system did not correctly

handle large queues. On some systems, a remote attacker could send

specially crafted traffic to crash the system, leading to a denial of

service. (CVE-2011-1581)

Vasiliy Kulikov discovered that taskstats listeners were not correctly

handled. A local attacker could expoit this to exhaust memory and CPU

resources, leading to a denial of service. (CVE-2011-2484)

Sami Liedes discovered that ext4 did not correctly handle missing root

inodes. A local attacker could trigger the mount of a specially crafted

filesystem to cause the system to crash, leading to a de...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service critical kernel flaw ubuntu

Update Instructions

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

Ubuntu 11.04:
  linux-image-2.6.38-11-generic   2.6.38-11.48
  linux-image-2.6.38-11-generic-pae  2.6.38-11.48
  linux-image-2.6.38-11-omap      2.6.38-11.48
  linux-image-2.6.38-11-powerpc   2.6.38-11.48
  linux-image-2.6.38-11-powerpc-smp  2.6.38-11.48
  linux-image-2.6.38-11-powerpc64-smp  2.6.38-11.48
  linux-image-2.6.38-11-server    2.6.38-11.48
  linux-image-2.6.38-11-versatile  2.6.38-11.48
  linux-image-2.6.38-11-virtual   2.6.38-11.48

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

References

https://ubuntu.com/security/notices/USN-1193-1

CVE-2011-1577, CVE-2011-1581, CVE-2011-2484, CVE-2011-2493

Severity
critical
Lowest
Low
Medium
High
Critical

August 19, 2011

Topics%20covered

Topics Covered

security advisory denial of service critical kernel flaw ubuntu

Package Information

https://launchpad.net/ubuntu/+source/linux/2.6.38-11.48

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