Ubuntu 1421-1: Linux kernel (Maverick backport) vulnerabilities

    Date12 Apr 2012
    CategoryUbuntu
    50
    Posted ByLinuxSecurity Advisories
    Several security issues were fixed in the kernel.
    ==========================================================================
    Ubuntu Security Notice USN-1421-1
    April 12, 2012
    
    linux-lts-backport-maverick 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-maverick: Linux kernel backport from Maverick
    
    Details:
    
    Sasha Levin discovered a flaw in the permission checking for device
    assignments requested via the kvm ioctl in the Linux kernel. A local user
    could use this flaw to crash the system causing a denial of service.
    (CVE-2011-4347)
    
    Stephan Bärwolf discovered a flaw in the KVM (kernel-based virtual
    machine) subsystem of the Linux kernel. A local unprivileged user can crash
    use this flaw to crash VMs causing a deny of service. (CVE-2012-0045)
    
    H. Peter Anvin reported a flaw in the Linux kernel that could crash the
    system. A local user could exploit this flaw to crash the system.
    (CVE-2012-1097)
    
    A flaw was discovered in the Linux kernel's cgroups subset. A local
    attacker could use this flaw to crash the system. (CVE-2012-1146)
    
    Update instructions:
    
    The problem can be corrected by updating your system to the following
    package versions:
    
    Ubuntu 10.04 LTS:
      linux-image-2.6.35-32-generic   2.6.35-32.68~lucid1
      linux-image-2.6.35-32-generic-pae  2.6.35-32.68~lucid1
      linux-image-2.6.35-32-server    2.6.35-32.68~lucid1
      linux-image-2.6.35-32-virtual   2.6.35-32.68~lucid1
    
    After a standard system update you need to reboot your computer to make
    all the necessary changes.
    
    References:
      http://www.ubuntu.com/usn/usn-1421-1
      CVE-2011-4347, CVE-2012-0045, CVE-2012-1097, CVE-2012-1146
    
    Package Information:
      https://launchpad.net/ubuntu/+source/linux-lts-backport-maverick/2.6.35-32.68~lucid1
    
    
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