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    Ubuntu 1781-1: Linux kernel (OMAP4) vulnerabilities

    Date
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    Several security issues were fixed in the kernel.
    ==========================================================================
    Ubuntu Security Notice USN-1781-1
    March 26, 2013
    
    linux-ti-omap4 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-ti-omap4: Linux kernel for OMAP4
    
    Details:
    
    Andrew Jones discovered a flaw with the xen_iret function in Linux kernel's
    Xen virtualizeation. In the 32-bit Xen paravirt platform an unprivileged
    guest OS user could exploit this flaw to cause a denial of service (crash
    the system) or gain guest OS privilege. (CVE-2013-0228)
    
    A flaw was reported in the permission checks done by the Linux kernel for
    /dev/cpu/*/msr. A local root user with all capabilities dropped could
    exploit this flaw to execute code with full root capabilities.
    (CVE-2013-0268)
    
    A flaw was discovered in the Linux kernel's vhost driver used to accelerate
    guest networking in KVM based virtual machines. A privileged guest user
    could exploit this flaw to crash the host system. (CVE-2013-0311)
    
    A flaw was discovered in the Extended Verification Module (EVM) of the
    Linux kernel. An unprivileged local user code exploit this flaw to cause a
    denial of service (system crash). (CVE-2013-0313)
    
    An information leak was discovered in the Linux kernel's Bluetooth stack
    when HIDP (Human Interface Device Protocol) support is enabled. A local
    unprivileged user could exploit this flaw to cause an information leak from
    the kernel. (CVE-2013-0349)
    
    A flaw was discovered in the Edgeort USB serial converter driver when the
    device is disconnected while it is in use. A local user could exploit this
    flaw to cause a denial of service (system crash). (CVE-2013-1774)
    
    Update instructions:
    
    The problem can be corrected by updating your system to the following
    package versions:
    
    Ubuntu 12.04 LTS:
      linux-image-3.2.0-1427-omap4    3.2.0-1427.36
    
    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-1781-1
      CVE-2013-0228, CVE-2013-0268, CVE-2013-0311, CVE-2013-0313,
      CVE-2013-0349, CVE-2013-1774
    
    Package Information:
      https://launchpad.net/ubuntu/+source/linux-ti-omap4/3.2.0-1427.36
    
    

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