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[USN-1293-1] Linux kernel vulnerabilities

Posted on 08 December 2011
Ubuntu Security

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Ubuntu Security Notice USN-1293-1
December 08, 2011

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

- Ubuntu 10.10

Summary:

Several security issues were fixed in the kernel.

Software Description:
- linux: Linux kernel

Details:

A bug was discovered in the XFS filesystem's handling of pathnames. A loc=
al
attacker could exploit this to crash the system, leading to a denial of
service, or gain root privileges. (CVE-2011-4077)

Nick Bowler discovered the kernel GHASH message digest algorithm
incorrectly handled error conditions. A local attacker could exploit this=

to cause a kernel oops. (CVE-2011-4081)

A flaw was found in the Journaling Block Device (JBD). A local attacker
able to mount ext3 or ext4 file systems could exploit this to crash the
system, leading to a denial of service. (CVE-2011-4132)

A bug was found in the way headroom check was performed in
udp6_ufo_fragment() function. A remote attacker could use this flaw to
crash the system. (CVE-2011-4326)

Clement Lecigne discovered a bug in the HFS file system bounds checking.
When a malformed HFS file system is mounted a local user could crash the
system or gain root privileges. (CVE-2011-4330)

Update instructions:

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

Ubuntu 10.10:
linux-image-2.6.35-31-generic 2.6.35-31.63
linux-image-2.6.35-31-generic-pae 2.6.35-31.63
linux-image-2.6.35-31-omap 2.6.35-31.63
linux-image-2.6.35-31-powerpc 2.6.35-31.63
linux-image-2.6.35-31-powerpc-smp 2.6.35-31.63
linux-image-2.6.35-31-powerpc64-smp 2.6.35-31.63
linux-image-2.6.35-31-server 2.6.35-31.63
linux-image-2.6.35-31-versatile 2.6.35-31.63
linux-image-2.6.35-31-virtual 2.6.35-31.63

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

References:
http://www.ubuntu.com/usn/usn-1293-1
CVE-2011-4077, CVE-2011-4081, CVE-2011-4132, CVE-2011-4326,
CVE-2011-4330

Package Information:
https://launchpad.net/ubuntu/+source/linux/2.6.35-31.63



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