Home / mailings [USN-1193-1] Linux kernel vulnerabilities
Posted on 19 August 2011
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==========================================================================
Ubuntu Security Notice USN-1193-1
August 19, 2011
linux vulnerabilities
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 11.04
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 denial of service.
(CVE-2011-2493)
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:
http://www.ubuntu.com/usn/usn-1193-1
CVE-2011-1577, CVE-2011-1581, CVE-2011-2484, CVE-2011-2493
Package Information:
https://launchpad.net/ubuntu/+source/linux/2.6.38-11.48
