Ubuntu Security Notice USN-1362-1
13th February, 2012
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 11.04
Several security issues were fixed in the kernel.
- linux - Linux kernel
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.
A flaw was found in KVM's Programmable Interval Timer (PIT). When a virtual
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.
The problem can be corrected by updating your system to the following package version:
- Ubuntu 11.04:
- linux-image-2.6.38-13-powerpc 2.6.38-13.55
- linux-image-2.6.38-13-powerpc64-smp 2.6.38-13.55
- linux-image-2.6.38-13-generic-pae 2.6.38-13.55
- linux-image-2.6.38-13-versatile 2.6.38-13.55
- linux-image-2.6.38-13-generic 2.6.38-13.55
- linux-image-2.6.38-13-virtual 2.6.38-13.55
- linux-image-2.6.38-13-server 2.6.38-13.55
- linux-image-2.6.38-13-omap 2.6.38-13.55
- linux-image-2.6.38-13-powerpc-smp 2.6.38-13.55
To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.
After a standard system update you need to reboot your computer to make
all the necessary changes.