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[USN-1362-1] Linux kernel vulnerabilities

Posted on 13 February 2012
Ubuntu Security

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Ubuntu Security Notice USN-1362-1
February 13, 2012

linux vulnerabilities
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A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 11.04

Summary:

Several security issues were fixed in the kernel.

Software Description:
- linux: Linux kernel

Details:

Han-Wen Nienhuys reported a flaw in the FUSE kernel module. A local user
who can mount a FUSE file system could cause a denial of service.
(CVE-2011-3353)

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

Chen Haogang discovered an integer overflow that could result in memory
corruption. A local unprivileged user could use this to crash the system.=

(CVE-2012-0044)

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 2.6.38-13.55
linux-image-2.6.38-13-generic-pae 2.6.38-13.55
linux-image-2.6.38-13-omap 2.6.38-13.55
linux-image-2.6.38-13-powerpc 2.6.38-13.55
linux-image-2.6.38-13-powerpc-smp 2.6.38-13.55
linux-image-2.6.38-13-powerpc64-smp 2.6.38-13.55
linux-image-2.6.38-13-server 2.6.38-13.55
linux-image-2.6.38-13-versatile 2.6.38-13.55
linux-image-2.6.38-13-virtual 2.6.38-13.55

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

References:
http://www.ubuntu.com/usn/usn-1362-1
CVE-2011-3353, CVE-2011-4622, CVE-2012-0038, CVE-2012-0044

Package Information:
https://launchpad.net/ubuntu/+source/linux/2.6.38-13.55


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