========================================================================== Ubuntu Security Notice USN-1286-1 December 03, 2011 linux vulnerabilities ========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 10.04 LTS Summary: Several security issues were fixed in the kernel. Software Description: - linux: Linux kernel Details: Vasily Averin discovered that the NFS Lock Manager (NLM) incorrectly handled unlock requests. A local attacker could exploit this to cause a denial of service. (CVE-2011-2491) Robert Swiecki discovered that mapping extensions were incorrectly handled. A local attacker could exploit this to crash the system, leading to a denial of service. (CVE-2011-2496) It was discovered that the wireless stack incorrectly verified SSID lengths. A local attacker could exploit this to cause a denial of service or gain root privileges. (CVE-2011-2517) Ben Pfaff discovered that Classless Queuing Disciplines (qdiscs) were being incorrectly handled. A local attacker could exploit this to crash the system, leading to a denial of service. (CVE-2011-2525) 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) 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 10.04 LTS: linux-image-2.6.32-36-386 2.6.32-36.79 linux-image-2.6.32-36-generic 2.6.32-36.79 linux-image-2.6.32-36-generic-pae 2.6.32-36.79 linux-image-2.6.32-36-ia64 2.6.32-36.79 linux-image-2.6.32-36-lpia 2.6.32-36.79 linux-image-2.6.32-36-powerpc 2.6.32-36.79 linux-image-2.6.32-36-powerpc-smp 2.6.32-36.79 linux-image-2.6.32-36-powerpc64-smp 2.6.32-36.79 linux-image-2.6.32-36-preempt 2.6.32-36.79 linux-image-2.6.32-36-server 2.6.32-36.79 linux-image-2.6.32-36-sparc64 2.6.32-36.79 linux-image-2.6.32-36-sparc64-smp 2.6.32-36.79 linux-image-2.6.32-36-versatile 2.6.32-36.79 linux-image-2.6.32-36-virtual 2.6.32-36.79 After a standard system update you need to reboot your computer to make all the necessary changes. References: http://www.ubuntu.com/usn/usn-1286-1 CVE-2011-2491, CVE-2011-2496, CVE-2011-2517, CVE-2011-2525, CVE-2011-4077, CVE-2011-4081, CVE-2011-4132, CVE-2011-4326, CVE-2011-4330 Package Information: https://launchpad.net/ubuntu/+source/linux/2.6.32-36.79