Ubuntu 1941-1: Linux kernel vulnerabilities

    Date06 Sep 2013
    CategoryUbuntu
    31
    Posted ByLinuxSecurity Advisories
    Several security issues were fixed in the kernel.
    ==========================================================================
    Ubuntu Security Notice USN-1941-1
    September 06, 2013
    
    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:
    
    Chanam Park reported a Null pointer flaw in the Linux kernel's Ceph client.
    A remote attacker could exploit this flaw to cause a denial of service
    (system crash). (CVE-2013-1059)
    
    Vasily Kulikov discovered a flaw in the Linux Kernel's perf tool that
    allows for privilege escalation. A local user could exploit this flaw to
    run commands as root when using the perf tool. (CVE-2013-1060)
    
    Jonathan Salwan discovered an information leak in the Linux kernel's cdrom
    driver. A local user can exploit this leak to obtain sensitive information
    from kernel memory if the CD-ROM drive is malfunctioning. (CVE-2013-2164)
    
    A flaw was discovered in the Linux kernel when an IPv6 socket is used to
    connect to an IPv4 destination. An 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)
    
    Kees Cook discovered a format string vulnerability in the Linux kernel's
    disk block layer. A local user with administrator privileges could exploit
    this flaw to gain kernel privileges. (CVE-2013-2851)
    
    Hannes Frederic Sowa discovered a flaw in 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 12.04 LTS:
      linux-image-3.2.0-53-generic    3.2.0-53.81
      linux-image-3.2.0-53-generic-pae  3.2.0-53.81
      linux-image-3.2.0-53-highbank   3.2.0-53.81
      linux-image-3.2.0-53-omap       3.2.0-53.81
      linux-image-3.2.0-53-powerpc-smp  3.2.0-53.81
      linux-image-3.2.0-53-powerpc64-smp  3.2.0-53.81
      linux-image-3.2.0-53-virtual    3.2.0-53.81
    
    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-1941-1
      CVE-2013-1059, CVE-2013-1060, CVE-2013-2164, CVE-2013-2232,
      CVE-2013-2234, CVE-2013-2851, CVE-2013-4162, CVE-2013-4163
    
    Package Information:
      https://launchpad.net/ubuntu/+source/linux/3.2.0-53.81
    
    
    
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