Ubuntu 2443-1: Linux kernel vulnerabilities

    Date12 Dec 2014
    CategoryUbuntu
    346
    Posted ByLinuxSecurity Advisories
    Several security issues were fixed in the kernel.
    ==========================================================================
    Ubuntu Security Notice USN-2443-1
    December 12, 2014
    
    linux vulnerabilities
    ==========================================================================
    
    A security issue affects these releases of Ubuntu and its derivatives:
    
    - Ubuntu 12.04 LTS
    
    Summary:
    
    Several security issues were fixed in the kernel.
    
    Software Description:
    - linux: Linux kernel
    
    Details:
    
    An information leak in the Linux kernel was discovered that could leak the
    high 16 bits of the kernel stack address on 32-bit Kernel Virtual Machine
    (KVM) paravirt guests. A user in the guest OS could exploit this leak to
    obtain information that could potentially be used to aid in attacking the
    kernel. (CVE-2014-8134)
    
    Rabin Vincent, Robert Swiecki, Russell King discovered that the ftrace
    subsystem of the Linux kernel does not properly handle private syscall
    numbers. A local user could exploit this flaw to cause a denial of service
    (OOPS). (CVE-2014-7826)
    
    Rabin Vincent, Robert Swiecki, Russell Kinglaw discovered a flaw in how the
    perf subsystem of the Linux kernel handles private systecall numbers. A
    local user could exploit this to cause a denial of service (OOPS) or bypass
    ASLR protections via a crafted application. (CVE-2014-7825)
    
    A null pointer dereference flaw was discovered in the the Linux kernel's
    SCTP implementation when ASCONF is used. A remote attacker could exploit
    this flaw to cause a denial of service (system crash) via a malformed INIT
    chunk. (CVE-2014-7841)
    
    A stack buffer overflow was discovered in the ioctl command handling for
    the Technotrend/Hauppauge USB DEC devices driver. A local user could
    exploit this flaw to cause a denial of service (system crash) or possibly
    gain privileges. (CVE-2014-8884)
    
    Andy Lutomirski discovered that the Linux kernel does not properly handle
    faults associated with the Stack Segment (SS) register on the x86
    architecture. A local attacker could exploit this flaw to cause a denial of
    service (panic). (CVE-2014-9090)
    
    Update instructions:
    
    The problem can be corrected by updating your system to the following
    package versions:
    
    Ubuntu 12.04 LTS:
      linux-image-3.2.0-74-generic    3.2.0-74.109
      linux-image-3.2.0-74-generic-pae  3.2.0-74.109
      linux-image-3.2.0-74-highbank   3.2.0-74.109
      linux-image-3.2.0-74-omap       3.2.0-74.109
      linux-image-3.2.0-74-powerpc-smp  3.2.0-74.109
      linux-image-3.2.0-74-powerpc64-smp  3.2.0-74.109
      linux-image-3.2.0-74-virtual    3.2.0-74.109
    
    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-2443-1
      CVE-2014-7825, CVE-2014-7826, CVE-2014-7841, CVE-2014-8134,
      CVE-2014-8884, CVE-2014-9090
    
    Package Information:
      https://launchpad.net/ubuntu/+source/linux/3.2.0-74.109
    
    
    
    You are not authorised to post comments.

    Comments powered by CComment

    LinuxSecurity Poll

    What do you think of the articles on LinuxSecurity?

    No answer selected. Please try again.
    Please select either existing option or enter your own, however not both.
    Please select minimum 0 answer(s) and maximum 3 answer(s).
    /main-polls/24-what-do-you-think-of-the-quality-of-the-articles-on-linuxsecurity?task=poll.vote&format=json
    24
    radio
    [{"id":"87","title":"Excellent, don't change a thing!","votes":"23","type":"x","order":"1","pct":53.49,"resources":[]},{"id":"88","title":"Should be more technical","votes":"5","type":"x","order":"2","pct":11.63,"resources":[]},{"id":"89","title":"Should include more HOWTOs","votes":"15","type":"x","order":"3","pct":34.88,"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
    bottom200

    We use cookies to provide and improve our services. By using our site, you consent to our Cookie Policy.