Ubuntu 1245-1: Linux kernel (Marvell DOVE) vulnerabilities

    Date 25 Oct 2011
    303
    Posted By LinuxSecurity Advisories
    Several security issues were fixed in the kernel.
    ==========================================================================
    Ubuntu Security Notice USN-1245-1
    October 25, 2011
    
    linux-mvl-dove vulnerabilities
    ==========================================================================
    
    A security issue affects these releases of Ubuntu and its derivatives:
    
    - Ubuntu 10.10
    
    Summary:
    
    Several security issues were fixed in the kernel.
    
    Software Description:
    - linux-mvl-dove: Linux kernel for DOVE
    
    Details:
    
    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)
    
    Vasiliy Kulikov and Dan Rosenberg discovered that ecryptfs did not
    correctly check the origin of mount points. A local attacker could exploit
    this to trick the system into unmounting arbitrary mount points, leading to
    a denial of service. (CVE-2011-1833)
    
    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)
    
    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 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)
    
    Fernando Gont discovered that the IPv6 stack used predictable fragment
    identification numbers. A remote attacker could exploit this to exhaust
    network resources, leading to a denial of service. (CVE-2011-2699)
    
    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)
    
    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)
    
    Update instructions:
    
    The problem can be corrected by updating your system to the following
    package versions:
    
    Ubuntu 10.10:
      linux-image-2.6.32-419-dove     2.6.32-419.37
    
    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:
      https://www.ubuntu.com/usn/usn-1245-1
      CVE-2011-1576, CVE-2011-1833, CVE-2011-2494, CVE-2011-2495,
      CVE-2011-2497, CVE-2011-2695, CVE-2011-2699, CVE-2011-2905,
      CVE-2011-2928, CVE-2011-3188, CVE-2011-3191
    
    Package Information:
      https://launchpad.net/ubuntu/+source/linux-mvl-dove/2.6.32-419.37
    
    
    

    LinuxSecurity Poll

    If you are using full-disk encryption: are you concerned about the resulting performance hit?

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    /main-polls/34-if-you-are-using-full-disk-encryption-are-you-concerned-about-the-resulting-performance-hit?task=poll.vote&format=json
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    [{"id":"120","title":"Yes","votes":"14","type":"x","order":"1","pct":58.33,"resources":[]},{"id":"121","title":"No ","votes":"10","type":"x","order":"2","pct":41.67,"resources":[]}] ["#ff5b00","#4ac0f2","#b80028","#eef66c","#60bb22","#b96a9a","#62c2cc"] ["rgba(255,91,0,0.7)","rgba(74,192,242,0.7)","rgba(184,0,40,0.7)","rgba(238,246,108,0.7)","rgba(96,187,34,0.7)","rgba(185,106,154,0.7)","rgba(98,194,204,0.7)"] 350
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