Ubuntu 1945-1: Linux kernel (OMAP4) vulnerabilities

    Date06 Sep 2013
    CategoryUbuntu
    29
    Posted ByLinuxSecurity Advisories
    Several security issues were fixed in the kernel.
    ==========================================================================
    Ubuntu Security Notice USN-1945-1
    September 06, 2013
    
    linux-ti-omap4 vulnerabilities
    ==========================================================================
    
    A security issue affects these releases of Ubuntu and its derivatives:
    
    - Ubuntu 12.10
    
    Summary:
    
    Several security issues were fixed in the kernel.
    
    Software Description:
    - linux-ti-omap4: Linux kernel for OMAP4
    
    Details:
    
    A denial of service flaw was discovered in the Btrfs file system in the
    Linux kernel. A local user could cause a denial of service by creating a
    large number of files with names that have the same CRC32 hash value.
    (CVE-2012-5374)
    
    A denial of service flaw was discovered in the Btrfs file system in the
    Linux kernel. A local user could cause a denial of service (prevent file
    creation) for a victim, by creating a file with a specific CRC32C hash
    value in a directory important to the victim. (CVE-2012-5375)
    
    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)
    
    A flaw was discovered in the Xen subsystem of the Linux kernel when it
    provides read-only access to a disk that supports TRIM or SCSI UNMAP to a
    guest OS. A privileged user in the guest OS could exploit this flaw to
    destroy data on the disk, even though the guest OS should not be able to
    write to 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. 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)
    
    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 12.10:
      linux-image-3.5.0-232-omap4     3.5.0-232.48
    
    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-1945-1
      CVE-2012-5374, CVE-2012-5375, 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-ti-omap4/3.5.0-232.48
    
    
    
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