Ubuntu 1286-1: Linux kernel vulnerabilities

    Date02 Dec 2011
    CategoryUbuntu
    29
    Posted ByLinuxSecurity Advisories
    Several security issues were fixed in the kernel.
    ==========================================================================
    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
    
    
    
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