USN-1312-1: Linux kernel vulnerabilities
19 December 2011
Several security issues were fixed in the kernel.
Releases
Packages
- linux - Linux kernel
Details
A bug was discovered in the XFS filesystem's handling of pathnames. A local
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)
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 11.04
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linux-image-2.6.38-13-powerpc
-
2.6.38-13.53
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linux-image-2.6.38-13-powerpc64-smp
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2.6.38-13.53
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linux-image-2.6.38-13-generic-pae
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2.6.38-13.53
-
linux-image-2.6.38-13-versatile
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2.6.38-13.53
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linux-image-2.6.38-13-generic
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2.6.38-13.53
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linux-image-2.6.38-13-virtual
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2.6.38-13.53
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linux-image-2.6.38-13-server
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2.6.38-13.53
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linux-image-2.6.38-13-omap
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2.6.38-13.53
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linux-image-2.6.38-13-powerpc-smp
-
2.6.38-13.53
After a standard system update you need to reboot your computer to make
all the necessary changes.