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    Ubuntu 4451-2: ppp vulnerability

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    ppp could be made to load arbitrary kernel modules and possibly run programs.
    ==========================================================================
    Ubuntu Security Notice USN-4451-2
    August 06, 2020
    
    ppp vulnerability
    ==========================================================================
    
    A security issue affects these releases of Ubuntu and its derivatives:
    
    - Ubuntu 14.04 ESM
    - Ubuntu 12.04 ESM
    
    Summary:
    
    ppp could be made to load arbitrary kernel modules and possibly run
    programs.
    
    Software Description:
    - ppp: Point-to-Point Protocol (PPP)
    
    Details:
    
    USN-4451-1 fixed a vulnerability in ppp. This update provides
    the corresponding update for Ubuntu 12.04 ESM and Ubuntu 14.04 ESM.
    
    Original advisory details:
    
     Thomas Chauchefoin discovered that ppp incorrectly handled module loading.
     A local attacker could use this issue to load arbitrary kernel modules and
     possibly execute arbitrary code.
    
    Update instructions:
    
    The problem can be corrected by updating your system to the following
    package versions:
    
    Ubuntu 14.04 ESM:
      ppp                             2.4.5-5.1ubuntu2.3+esm2
    
    Ubuntu 12.04 ESM:
      ppp                             2.4.5-5ubuntu1.4
    
    In general, a standard system update will make all the necessary changes.
    
    References:
      https://usn.ubuntu.com/4451-2
      https://usn.ubuntu.com/4451-1
      CVE-2020-15704
    

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