Ubuntu 1292-1: Linux kernel (Maverick backport) vulnerabilities

    Date08 Dec 2011
    Posted ByLinuxSecurity Advisories
    Several security issues were fixed in the kernel.
    Ubuntu Security Notice USN-1292-1
    December 08, 2011
    linux-lts-backport-maverick vulnerabilities
    A security issue affects these releases of Ubuntu and its derivatives:
    - Ubuntu 10.04 LTS
    Several security issues were fixed in the kernel.
    Software Description:
    - linux-lts-backport-maverick: Linux kernel backport from Maverick
    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-2.6.35-31-generic   2.6.35-31.63~lucid1
      linux-image-2.6.35-31-generic-pae  2.6.35-31.63~lucid1
      linux-image-2.6.35-31-server    2.6.35-31.63~lucid1
      linux-image-2.6.35-31-virtual   2.6.35-31.63~lucid1
    After a standard system update you need to reboot your computer to make
    all the necessary changes.
    ATTENTION: Due to an unavoidable ABI change the kernel updates have
    been given a new version number, which requires you to recompile and
    reinstall all third party kernel modules you might have installed. If
    you use linux-restricted-modules, you have to update that package as
    well to get modules which work with the new kernel version. Unless you
    manually uninstalled the standard kernel metapackages (e.g. linux-generic,
    linux-server, linux-powerpc), a standard system upgrade will automatically
    perform this as well.
      CVE-2011-4077, CVE-2011-4081, CVE-2011-4132, CVE-2011-4326,
    Package Information:

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