Ubuntu 1688-1: Linux kernel (Oneiric backport) vulnerabilities

    Date15 Jan 2013
    CategoryUbuntu
    59
    Posted ByLinuxSecurity Advisories
    Several security issues were fixed in the kernel.
    ==========================================================================
    Ubuntu Security Notice USN-1688-1
    January 15, 2013
    
    linux-lts-backport-oneiric vulnerabilities
    ==========================================================================
    
    A security issue affects these releases of Ubuntu and its derivatives:
    
    - Ubuntu 10.04 LTS
    
    Summary:
    
    Several security issues were fixed in the kernel.
    
    Software Description:
    - linux-lts-backport-oneiric: Linux kernel backport from Oneiric
    
    Details:
    
    Jon Howell reported a flaw in the Linux kernel's KVM (Kernel-based virtual
    machine) subsystem's handling of the XSAVE feature. On hosts, using qemu
    userspace, without the XSAVE feature an unprivileged local attacker could
    exploit this flaw to crash the system. (CVE-2012-4461)
    
    A flaw was discovered in the Linux kernel's handling of script execution
    when module loading is enabled. A local attacker could exploit this flaw to
    cause a leak of kernel stack contents. (CVE-2012-4530)
    
    Update instructions:
    
    The problem can be corrected by updating your system to the following
    package versions:
    
    Ubuntu 10.04 LTS:
      linux-image-3.0.0-30-generic    3.0.0-30.47~lucid1
      linux-image-3.0.0-30-generic-pae  3.0.0-30.47~lucid1
      linux-image-3.0.0-30-server     3.0.0-30.47~lucid1
      linux-image-3.0.0-30-virtual    3.0.0-30.47~lucid1
    
    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-1688-1
      CVE-2012-4461, CVE-2012-4530
    
    Package Information:
      https://launchpad.net/ubuntu/+source/linux-lts-backport-oneiric/3.0.0-30.47~lucid1
    
    
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