Ubuntu 1453-1: Linux kernel (EC2) vulnerabilities

    Date25 May 2012
    CategoryUbuntu
    44
    Posted ByLinuxSecurity Advisories
    Several security issues were fixed in the kernel.
    ==========================================================================
    Ubuntu Security Notice USN-1453-1
    May 25, 2012
    
    linux-ec2 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-ec2: Linux kernel for EC2
    
    Details:
    
    A flaw was found in the Linux's kernels ext4 file system when mounted with
    a journal. A local, unprivileged user could exploit this flaw to cause a
    denial of service. (CVE-2011-4086)
    
    A flaw was found in the Linux kernel's KVM (Kernel Virtual Machine) virtual
    cpu setup. An unprivileged local user could exploit this flaw to crash the
    system leading to a denial of service. (CVE-2012-1601)
    
    Steve Grubb reported a flaw with Linux fscaps (file system base
    capabilities) when used to increase the permissions of a process. For
    application on which fscaps are in use a local attacker can disable address
    space randomization to make attacking the process with raised privileges
    easier. (CVE-2012-2123)
    
    Update instructions:
    
    The problem can be corrected by updating your system to the following
    package versions:
    
    Ubuntu 10.04 LTS:
      linux-image-2.6.32-345-ec2      2.6.32-345.48
    
    After a standard system update you need to reboot your computer to make
    all the necessary changes.
    
    References:
      http://www.ubuntu.com/usn/usn-1453-1
      CVE-2011-4086, CVE-2012-1601, CVE-2012-2123
    
    Package Information:
      https://launchpad.net/ubuntu/+source/linux-ec2/2.6.32-345.48
    
    
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