Ubuntu 0024-1: Linux kernel vulnerability

    Date21 Jun 2017
    CategoryUbuntu
    42
    Posted ByLinuxSecurity Advisories
    Several security issues were fixed in the kernel.
    ==========================================================================
    Kernel Live Patch Security Notice LSN-0024-1
    June 21, 2017
    
    linux vulnerability
    ==========================================================================
    
    A security issue affects these releases of Ubuntu:
    
    | Series           | Base kernel  | Arch     | flavors          |
    |------------------+--------------+----------+------------------|
    | Ubuntu 16.04 LTS | 4.4.0        | amd64    | generic          |
    | Ubuntu 16.04 LTS | 4.4.0        | amd64    | lowlatency       |
    | Ubuntu 14.04 LTS | 4.4.0        | amd64    | generic          |
    | Ubuntu 14.04 LTS | 4.4.0        | amd64    | lowlatency       |
    
    Summary:
    
    Several security issues were fixed in the kernel.
    
    Software Description:
    - linux: Linux kernel
    
    Details:
    
    It was discovered that the stack guard page for processes in the Linux
    kernel was not sufficiently large enough to prevent overlapping with the
    heap. An attacker could leverage this with another vulnerability to execute
    arbitrary code and gain administrative privileges (CVE-2017-1000364)
    
    Update instructions:
    
    The problem can be corrected by updating your livepatches to the following
    versions:
    
    | Kernel          | Version  | flavors                  |
    |-----------------+----------+--------------------------|
    | 4.4.0-21.37     | 24.2     | generic, lowlatency      |
    | 4.4.0-22.39     | 24.2     | generic, lowlatency      |
    | 4.4.0-22.40     | 24.2     | generic, lowlatency      |
    | 4.4.0-24.43     | 24.2     | generic, lowlatency      |
    | 4.4.0-28.47     | 24.2     | generic, lowlatency      |
    | 4.4.0-31.50     | 24.2     | generic, lowlatency      |
    | 4.4.0-34.53     | 24.2     | generic, lowlatency      |
    | 4.4.0-36.55     | 24.2     | generic, lowlatency      |
    | 4.4.0-38.57     | 24.2     | generic, lowlatency      |
    | 4.4.0-42.62     | 24.2     | generic, lowlatency      |
    | 4.4.0-43.63     | 24.2     | generic, lowlatency      |
    | 4.4.0-45.66     | 24.2     | generic, lowlatency      |
    | 4.4.0-47.68     | 24.2     | generic, lowlatency      |
    | 4.4.0-51.72     | 24.2     | generic, lowlatency      |
    | 4.4.0-53.74     | 24.2     | generic, lowlatency      |
    | 4.4.0-57.78     | 24.2     | generic, lowlatency      |
    | 4.4.0-59.80     | 24.2     | generic, lowlatency      |
    | 4.4.0-62.83     | 24.2     | generic, lowlatency      |
    | 4.4.0-63.84     | 24.2     | generic, lowlatency      |
    | 4.4.0-64.85     | 24.2     | generic, lowlatency      |
    | 4.4.0-66.87     | 24.2     | generic, lowlatency      |
    | 4.4.0-67.88     | 24.2     | generic, lowlatency      |
    | 4.4.0-70.91     | 24.2     | generic, lowlatency      |
    | 4.4.0-71.92     | 24.2     | generic, lowlatency      |
    | 4.4.0-72.93     | 24.2     | generic, lowlatency      |
    | 4.4.0-75.96     | 24.2     | generic, lowlatency      |
    | 4.4.0-77.98     | 24.2     | generic, lowlatency      |
    | 4.4.0-78.99     | 24.2     | generic, lowlatency      |
    | 4.4.0-79.100    | 24.2     | generic, lowlatency      |
    | lts-4.4.0-21.37_14.04.1-lts-xenial | 24.2 | generic, lowlatency      |
    | lts-4.4.0-22.39_14.04.1-lts-xenial | 24.2 | generic, lowlatency      |
    | lts-4.4.0-22.40_14.04.1-lts-xenial | 24.2 | generic, lowlatency      |
    | lts-4.4.0-24.43_14.04.1-lts-xenial | 24.2 | generic, lowlatency      |
    | lts-4.4.0-28.47_14.04.1-lts-xenial | 24.2 | generic, lowlatency      |
    | lts-4.4.0-31.50_14.04.1-lts-xenial | 24.2 | generic, lowlatency      |
    | lts-4.4.0-34.53_14.04.1-lts-xenial | 24.2 | generic, lowlatency      |
    | lts-4.4.0-36.55_14.04.1-lts-xenial | 24.2 | generic, lowlatency      |
    | lts-4.4.0-38.57_14.04.1-lts-xenial | 24.2 | generic, lowlatency      |
    | lts-4.4.0-42.62_14.04.1-lts-xenial | 24.2 | generic, lowlatency      |
    | lts-4.4.0-45.66_14.04.1-lts-xenial | 24.2 | generic, lowlatency      |
    | lts-4.4.0-47.68_14.04.1-lts-xenial | 24.2 | generic, lowlatency      |
    | lts-4.4.0-51.72_14.04.1-lts-xenial | 24.2 | generic, lowlatency      |
    | lts-4.4.0-53.74_14.04.1-lts-xenial | 24.2 | generic, lowlatency      |
    | lts-4.4.0-57.78_14.04.1-lts-xenial | 24.2 | generic, lowlatency      |
    | lts-4.4.0-59.80_14.04.1-lts-xenial | 24.2 | generic, lowlatency      |
    | lts-4.4.0-62.83_14.04.1-lts-xenial | 24.2 | generic, lowlatency      |
    | lts-4.4.0-63.84_14.04.2-lts-xenial | 24.2 | generic, lowlatency      |
    | lts-4.4.0-64.85_14.04.1-lts-xenial | 24.2 | generic, lowlatency      |
    | lts-4.4.0-66.87_14.04.1-lts-xenial | 24.2 | generic, lowlatency      |
    | lts-4.4.0-70.91_14.04.1-lts-xenial | 24.2 | generic, lowlatency      |
    | lts-4.4.0-71.92_14.04.1-lts-xenial | 24.2 | generic, lowlatency      |
    
    Additionally, you should install an updated kernel with these fixes and
    reboot at your convienience.
    
    References:
      CVE-2017-1000364
    
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