Ubuntu 2773-1: Linux kernel vulnerabilities

    Date20 Oct 2015
    CategoryUbuntu
    37
    Posted ByLinuxSecurity Advisories
    Several security issues were fixed in the kernel.
    ==========================================================================
    Ubuntu Security Notice USN-2773-1
    October 19, 2015
    
    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:
    
    It was discovered that virtio networking in the Linux kernel did not handle
    fragments correctly, leading to kernel memory corruption. A remote attacker
    could use this to cause a denial of service (system crash) or possibly
    execute code with administrative privileges. (CVE-2015-5156)
    
    It was discovered that the Reliable Datagram Sockets (RDS) implementation
    in the Linux kernel did not verify sockets were properly bound before
    attempting to send a message, which could cause a NULL pointer dereference.
    An attacker could use this to cause a denial of service (system crash).
    (CVE-2015-6937)
    
    Update instructions:
    
    The problem can be corrected by updating your system to the following
    package versions:
    
    Ubuntu 12.04 LTS:
      linux-image-3.2.0-92-generic    3.2.0-92.130
      linux-image-3.2.0-92-generic-pae  3.2.0-92.130
      linux-image-3.2.0-92-highbank   3.2.0-92.130
      linux-image-3.2.0-92-omap       3.2.0-92.130
      linux-image-3.2.0-92-powerpc-smp  3.2.0-92.130
      linux-image-3.2.0-92-powerpc64-smp  3.2.0-92.130
      linux-image-3.2.0-92-virtual    3.2.0-92.130
    
    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-2773-1
      CVE-2015-5156, CVE-2015-6937
    
    Package Information:
      https://launchpad.net/ubuntu/+source/linux/3.2.0-92.130
    
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