Ubuntu 1532-1: Linux kernel (OMAP4) vulnerabilities

    Date10 Aug 2012
    CategoryUbuntu
    55
    Posted ByLinuxSecurity Advisories
    Several security issues were fixed in the kernel.
    ==========================================================================
    Ubuntu Security Notice USN-1532-1
    August 10, 2012
    
    linux-ti-omap4 vulnerabilities
    ==========================================================================
    
    A security issue affects these releases of Ubuntu and its derivatives:
    
    - Ubuntu 11.10
    
    Summary:
    
    Several security issues were fixed in the kernel.
    
    Software Description:
    - linux-ti-omap4: Linux kernel for OMAP4
    
    Details:
    
    An error was discovered in the Linux kernel's network TUN/TAP device
    implementation. A local user with access to the TUN/TAP interface (which is
    not available to unprivileged users until granted by a root user) could
    exploit this flaw to crash the system or potential gain administrative
    privileges. (CVE-2012-2136)
    
    Ulrich Obergfell discovered an error in the Linux kernel's memory
    management subsystem on 32 bit PAE systems with more than 4GB of memory
    installed. A local unprivileged user could exploit this flaw to crash the
    system. (CVE-2012-2373)
    
    A flaw was discovered in the Linux kernel's epoll system call. An
    unprivileged local user could use this flaw to crash the system.
    (CVE-2012-3375)
    
    Some errors where discovered in the Linux kernel's UDF file system, which
    is used to mount some CD-ROMs and DVDs. An unprivileged local user could
    use these flaws to crash the system. (CVE-2012-3400)
    
    Update instructions:
    
    The problem can be corrected by updating your system to the following
    package versions:
    
    Ubuntu 11.10:
      linux-image-3.0.0-1214-omap4    3.0.0-1214.26
    
    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-1532-1
      CVE-2012-2136, CVE-2012-2373, CVE-2012-3375, CVE-2012-3400
    
    Package Information:
      https://launchpad.net/ubuntu/+source/linux-ti-omap4/3.0.0-1214.26
    
    
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