Ubuntu 4040-2: Expat vulnerability

    Date26 Jun 2019
    CategoryUbuntu
    3079
    Posted ByLinuxSecurity Advisories
    Expat could be made to consume a high amount of RAM and CPU resources if it received a specially crafted XML file.
    ==========================================================================
    Ubuntu Security Notice USN-4040-2
    June 26, 2019
    
    expat vulnerability
    ==========================================================================
    
    A security issue affects these releases of Ubuntu and its derivatives:
    
    - Ubuntu 14.04 ESM
    - Ubuntu 12.04 ESM
    
    Summary:
    
    Expat could be made to consume a high amount of RAM and CPU
    resources if it received a specially crafted XML file.
    
    Software Description:
    - expat: XML parsing C library
    
    Details:
    
    USN-4040-1 fixed a vulnerability in expat. This update provides
    the corresponding update for Ubuntu 12.04 ESM and Ubuntu 14.04 ESM.
    
    Original advisory details:
    
     It was discovered that Expat incorrectly handled certain XML files.
     An attacker could possibly use this issue to cause a denial of service.
    
    Update instructions:
    
    The problem can be corrected by updating your system to the following
    package versions:
    
    Ubuntu 14.04 ESM:
      lib64expat1                     2.1.0-4ubuntu1.4+esm1
      libexpat1                       2.1.0-4ubuntu1.4+esm1
    
    Ubuntu 12.04 ESM:
      lib64expat1                     2.0.1-7.2ubuntu1.6
      libexpat1                       2.0.1-7.2ubuntu1.6
    
    In general, a standard system update will make all the necessary changes.
    
    References:
      https://usn.ubuntu.com/4040-2
      https://usn.ubuntu.com/4040-1
      CVE-2018-20843
    
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