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    Ubuntu 1938-1: Linux kernel vulnerabilities

    Date
    103
    Posted By
    Several security issues were fixed in the kernel.
    ==========================================================================
    Ubuntu Security Notice USN-1938-1
    September 05, 2013
    
    linux vulnerabilities
    ==========================================================================
    
    A security issue affects these releases of Ubuntu and its derivatives:
    
    - Ubuntu 13.04
    
    Summary:
    
    Several security issues were fixed in the kernel.
    
    Software Description:
    - linux: Linux kernel
    
    Details:
    
    Vasily Kulikov discovered a flaw in the Linux Kernel's perf tool that
    allows for privilege escalation. A local could exploit this flaw to run
    commands as root when using the perf tool. (CVE-2013-1060)
    
    A flaw was discovered in the Xen subsystem of the Linux kernel when it
    provides a guest OS read-only access to disks that support TRIM or SCSI
    UNMAP. A privileged user in the guest OS could exploit this flaw to
    destroy data on the disk. (CVE-2013-2140)
    
    A flaw was discovered in the Linux kernel when an IPv6 socket is used to
    connect to an IPv4 destination. A unprivileged local user could exploit
    this flaw to cause a denial of service (system crash). (CVE-2013-2232)
    
    An information leak was discovered in the IPSec key_socket implementation
    in the Linux kernel. An local user could exploit this flaw to examine
    potentially sensitive information in kernel memory. (CVE-2013-2234)
    
    Hannes Frederic Sowa discovered a flaw in the setsockopt UDP_CORK option
    in the Linux kernel's IPv6 stack. A local user could exploit this flaw to
    cause a denial of service (system crash). (CVE-2013-4162)
    
    Hannes Frederic Sowa discovered a flaw in the IPv6 subsystem of the Linux
    kernel when the IPV6_MTU setsockopt option has been specified in
    combination with the UDP_CORK option. A local user could exploit this flaw
    to cause a denial of service (system crash). (CVE-2013-4163)
    
    Update instructions:
    
    The problem can be corrected by updating your system to the following
    package versions:
    
    Ubuntu 13.04:
      linux-image-3.8.0-30-generic    3.8.0-30.44
    
    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-1938-1
      CVE-2013-1060, CVE-2013-2140, CVE-2013-2232, CVE-2013-2234,
      CVE-2013-4162, CVE-2013-4163
    
    Package Information:
      https://launchpad.net/ubuntu/+source/linux/3.8.0-30.44
    
    
    

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