Ubuntu 1294-1: Linux kernel (Oneiric backport) vulnerabilities

    Date08 Dec 2011
    CategoryUbuntu
    61
    Posted ByLinuxSecurity Advisories
    Several security issues were fixed in the kernel.
    ==========================================================================
    Ubuntu Security Notice USN-1294-1
    December 08, 2011
    
    linux-lts-backport-oneiric 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-lts-backport-oneiric: Linux kernel backport from Oneiric
    
    Details:
    
    Peter Huewe discovered an information leak in the handling of reading
    security-related TPM data. A local, unprivileged user could read the
    results of a previous TPM command. (CVE-2011-1162)
    
    Vasiliy Kulikov discovered that taskstats did not enforce access
    restrictions. A local attacker could exploit this to read certain
    information, leading to a loss of privacy. (CVE-2011-2494)
    
    Qianfeng Zhang discovered that the bridge networking interface incorrectly
    handled certain network packets. A remote attacker could exploit this to
    crash the system, leading to a denial of service. (CVE-2011-2942)
    
    Yasuaki Ishimatsu discovered a flaw in the kernel's clock implementation. A
    local unprivileged attacker could exploit this causing a denial of service.
    (CVE-2011-3209)
    
    Zheng Liu discovered a flaw in how the ext4 filesystem splits extents. A
    local unprivileged attacker could exploit this to crash the system, leading
    to a denial of service. (CVE-2011-3638)
    
    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)
    
    Scot Doyle discovered that the bridge networking interface incorrectly
    handled certain network packets. A remote attacker could exploit this to
    crash the system, leading to a denial of service. (CVE-2011-4087)
    
    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)
    
    Update instructions:
    
    The problem can be corrected by updating your system to the following
    package versions:
    
    Ubuntu 10.04 LTS:
      linux-image-3.0.0-13-generic    3.0.0-13.22~lucid1
      linux-image-3.0.0-13-generic-pae  3.0.0-13.22~lucid1
      linux-image-3.0.0-13-server     3.0.0-13.22~lucid1
      linux-image-3.0.0-13-virtual    3.0.0-13.22~lucid1
    
    After a standard system update you need to reboot your computer to make
    all the necessary changes.
    
    References:
      http://www.ubuntu.com/usn/usn-1294-1
      CVE-2011-1162, CVE-2011-2494, CVE-2011-2942, CVE-2011-3209,
      CVE-2011-3638, CVE-2011-4081, CVE-2011-4087, CVE-2011-4326
    
    Package Information:
      https://launchpad.net/ubuntu/+source/linux-lts-backport-oneiric/3.0.0-13.22~lucid1
    
    
    
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