Ubuntu 1241-1: Linux kernel (i.MX51) vulnerabilities

    Date25 Oct 2011
    CategoryUbuntu
    75
    Posted ByLinuxSecurity Advisories
    Several security issues were fixed in the kernel.
    ==========================================================================
    Ubuntu Security Notice USN-1241-1
    October 25, 2011
    
    linux-fsl-imx51 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-fsl-imx51: Linux kernel for IMX51
    
    Details:
    
    It was discovered that the Stream Control Transmission Protocol (SCTP)
    implementation incorrectly calculated lengths. If the net.sctp.addip_enable
    variable was turned on, a remote attacker could send specially crafted
    traffic to crash the system. (CVE-2011-1573)
    
    Ryan Sweat discovered that the kernel incorrectly handled certain VLAN
    packets. On some systems, a remote attacker could send specially crafted
    traffic to crash the system, leading to a denial of service.
    (CVE-2011-1576)
    
    Timo Warns discovered that the EFI GUID partition table was not correctly
    parsed. A physically local attacker that could insert mountable devices
    could exploit this to crash the system or possibly gain root privileges.
    (CVE-2011-1776)
    
    Dan Rosenberg discovered that the IPv4 diagnostic routines did not
    correctly validate certain requests. A local attacker could exploit this to
    consume CPU resources, leading to a denial of service. (CVE-2011-2213)
    
    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)
    
    Vasiliy Kulikov discovered that /proc/PID/io did not enforce access
    restrictions. A local attacker could exploit this to read certain
    information, leading to a loss of privacy. (CVE-2011-2495)
    
    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)
    
    Dan Rosenberg discovered that the Bluetooth stack incorrectly handled
    certain L2CAP requests. If a system was using Bluetooth, a remote attacker
    could send specially crafted traffic to crash the system or gain root
    privileges. (CVE-2011-2497)
    
    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)
    
    It was discovered that the EXT4 filesystem contained multiple off-by-one
    flaws. A local attacker could exploit this to crash the system, leading to
    a denial of service. (CVE-2011-2695)
    
    Herbert Xu discovered that certain fields were incorrectly handled when
    Generic Receive Offload (CVE-2011-2723)
    
    Christian Ohm discovered that the perf command looks for configuration
    files in the current directory. If a privileged user were tricked into
    running perf in a directory containing a malicious configuration file, an
    attacker could run arbitrary commands and possibly gain privileges.
    (CVE-2011-2905)
    
    Vasiliy Kulikov discovered that the Comedi driver did not correctly clear
    memory. A local attacker could exploit this to read kernel stack memory,
    leading to a loss of privacy. (CVE-2011-2909)
    
    Time Warns discovered that long symlinks were incorrectly handled on Be
    filesystems. A local attacker could exploit this with a malformed Be
    filesystem and crash the system, leading to a denial of service.
    (CVE-2011-2928)
    
    Dan Kaminsky discovered that the kernel incorrectly handled random sequence
    number generation. An attacker could use this flaw to possibly predict
    sequence numbers and inject packets. (CVE-2011-3188)
    
    Darren Lavender discovered that the CIFS client incorrectly handled certain
    large values. A remote attacker with a malicious server could exploit this
    to crash the system or possibly execute arbitrary code as the root user.
    (CVE-2011-3191)
    
    Yogesh Sharma discovered that CIFS did not correctly handle UNCs that had
    no prefixpaths. A local attacker with access to a CIFS partition could
    exploit this to crash the system, leading to a denial of service.
    (CVE-2011-3363)
    
    Update instructions:
    
    The problem can be corrected by updating your system to the following
    package versions:
    
    Ubuntu 10.04 LTS:
      linux-image-2.6.31-611-imx51    2.6.31-611.29
    
    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.
    
    References:
      http://www.ubuntu.com/usn/usn-1241-1
      CVE-2011-1573, CVE-2011-1576, CVE-2011-1776, CVE-2011-2213,
      CVE-2011-2494, CVE-2011-2495, CVE-2011-2496, CVE-2011-2497,
      CVE-2011-2517, CVE-2011-2525, CVE-2011-2695, CVE-2011-2723,
      CVE-2011-2905, CVE-2011-2909, CVE-2011-2928, CVE-2011-3188,
      CVE-2011-3191, CVE-2011-3363
    
    Package Information:
      https://launchpad.net/ubuntu/+source/linux-fsl-imx51/2.6.31-611.29
    
    
    
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