Ubuntu 2467-1: Linux kernel (Utopic HWE) vulnerabilities

    Date 13 Jan 2015
    65
    Posted By LinuxSecurity Advisories
    Several security issues were fixed in the kernel.
    ==========================================================================
    Ubuntu Security Notice USN-2467-1
    January 13, 2015
    
    linux-lts-utopic vulnerabilities
    ==========================================================================
    
    A security issue affects these releases of Ubuntu and its derivatives:
    
    - Ubuntu 14.04 LTS
    
    Summary:
    
    Several security issues were fixed in the kernel.
    
    Software Description:
    - linux-lts-utopic: Linux hardware enablement kernel from Utopic
    
    Details:
    
    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 race condition with MMIO and PIO transactions in the KVM (Kernel Virtual
    Machine) subsystem of the Linux kernel was discovered. A guest OS user
    could exploit this flaw to cause a denial of service (guest OS crash) via a
    specially crafted application. (CVE-2014-7842)
    
    Miloš Prchlík reported a flaw in how the ARM64 platform handles a single
    byte overflow in __clear_user. A local user could exploit this flaw to
    cause a denial of service (system crash) by reading one byte beyond a
    /dev/zero page boundary. (CVE-2014-7843)
    
    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)
    
    Update instructions:
    
    The problem can be corrected by updating your system to the following
    package versions:
    
    Ubuntu 14.04 LTS:
      linux-image-3.16.0-29-generic   3.16.0-29.39~14.04.1
      linux-image-3.16.0-29-generic-lpae  3.16.0-29.39~14.04.1
      linux-image-3.16.0-29-lowlatency  3.16.0-29.39~14.04.1
      linux-image-3.16.0-29-powerpc-e500mc  3.16.0-29.39~14.04.1
      linux-image-3.16.0-29-powerpc-smp  3.16.0-29.39~14.04.1
      linux-image-3.16.0-29-powerpc64-emb  3.16.0-29.39~14.04.1
      linux-image-3.16.0-29-powerpc64-smp  3.16.0-29.39~14.04.1
    
    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-2467-1
      CVE-2014-7841, CVE-2014-7842, CVE-2014-7843, CVE-2014-8884
    
    Package Information:
      https://launchpad.net/ubuntu/+source/linux-lts-utopic/3.16.0-29.39~14.04.1
    
    
    

    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
    34
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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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