Ubuntu 1573-1: Linux kernel (EC2) vulnerabilities

    Date18 Sep 2012
    CategoryUbuntu
    74
    Posted ByLinuxSecurity Advisories
    Several security issues were fixed in the kernel.
    ==========================================================================
    Ubuntu Security Notice USN-1573-1
    September 19, 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:
    
    Ben Hutchings reported a flaw in the Linux kernel with some network drivers
    that support TSO (TCP segment offload). A local or peer user could exploit
    this flaw to to cause a denial of service. (CVE-2012-3412)
    
    Jay Fenlason and Doug Ledford discovered a bug in the Linux kernel
    implementation of RDS sockets. A local unprivileged user could potentially
    use this flaw to read privileged information from the kernel.
    (CVE-2012-3430)
    
    A flaw was discovered in the madvise feature of the Linux kernel's memory
    subsystem. An unprivileged local use could exploit the flaw to cause a
    denial of service (crash the system). (CVE-2012-3511)
    
    Update instructions:
    
    The problem can be corrected by updating your system to the following
    package versions:
    
    Ubuntu 10.04 LTS:
      linux-image-2.6.32-348-ec2      2.6.32-348.54
    
    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-1573-1
      CVE-2012-3412, CVE-2012-3430, CVE-2012-3511
    
    Package Information:
      https://launchpad.net/ubuntu/+source/linux-ec2/2.6.32-348.54
    
    
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