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    Ubuntu 4524-1: TNEF vulnerabilities

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    TNEF could be made to crash or write arbitrary files to the filesystem.
    ==========================================================================
    Ubuntu Security Notice USN-4524-1
    September 21, 2020
    
    tnef vulnerabilities
    ==========================================================================
    
    A security issue affects these releases of Ubuntu and its derivatives:
    
    - Ubuntu 16.04 LTS
    
    Summary:
    
    TNEF could be made to crash or write arbitrary files to the filesystem.
    
    Software Description:
    - tnef: Tool to unpack MIME application/ms-tnef attachments
    
    Details:
    
    Paul Dreik discovered that TNEF incorrectly handled filenames. If a user
    were tricked into opening a specially crafted email attachment, an
    attacker could possibly use this issue to write arbitrary files to the
    filesystem or cause TNEF crash, resulting in a denial of service.
    (CVE-2019-18849)
    
    Update instructions:
    
    The problem can be corrected by updating your system to the following
    package versions:
    
    Ubuntu 16.04 LTS:
      tnef                            1.4.9-1+deb8u4build0.16.04.1
    
    In general, a standard system update will make all the necessary changes.
    
    References:
      https://usn.ubuntu.com/4524-1
      CVE-2019-18849
    
    Package Information:
      https://launchpad.net/ubuntu/+source/tnef/1.4.9-1+deb8u4build0.16.04.1
    
    
    

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