Ubuntu 1432-1: Linux kernel vulnerabilities

    Date08 May 2012
    Posted ByLinuxSecurity Advisories
    Several security issues were fixed in the kernel.
    Ubuntu Security Notice USN-1432-1
    May 08, 2012
    linux vulnerabilities
    A security issue affects these releases of Ubuntu and its derivatives:
    - Ubuntu 11.04
    Several security issues were fixed in the kernel.
    Software Description:
    - linux: Linux kernel
    A flaw was found in the Linux's kernels ext4 file system when mounted with
    a journal. A local, unprivileged user could exploit this flaw to cause a
    denial of service. (CVE-2011-4086)
    A flaw was discovered in the Linux kernel's cifs file system. An
    unprivileged local user could exploit this flaw to crash the system leading
    to a denial of service. (CVE-2012-1090)
    A flaw was found in the Linux kernel's ext4 file system when mounting a
    corrupt filesystem. A user-assisted remote attacker could exploit this flaw
    to cause a denial of service. (CVE-2012-2100)
    Update instructions:
    The problem can be corrected by updating your system to the following
    package versions:
    Ubuntu 11.04:
      linux-image-2.6.38-15-generic   2.6.38-15.59
      linux-image-2.6.38-15-generic-pae  2.6.38-15.59
      linux-image-2.6.38-15-omap      2.6.38-15.59
      linux-image-2.6.38-15-powerpc   2.6.38-15.59
      linux-image-2.6.38-15-powerpc-smp  2.6.38-15.59
      linux-image-2.6.38-15-powerpc64-smp  2.6.38-15.59
      linux-image-2.6.38-15-server    2.6.38-15.59
      linux-image-2.6.38-15-versatile  2.6.38-15.59
      linux-image-2.6.38-15-virtual   2.6.38-15.59
    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-2011-4086, CVE-2012-1090, CVE-2012-2100
    Package Information:

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