Linux Security
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    Ubuntu 4567-1: OpenDMARC vulnerability

    Date 06 Oct 2020
    120
    Posted By LinuxSecurity Advisories
    OpenDMARC could allow signature bypass under certain conditions.
    ==========================================================================
    Ubuntu Security Notice USN-4567-1
    October 05, 2020
    
    opendmarc vulnerability
    ==========================================================================
    
    A security issue affects these releases of Ubuntu and its derivatives:
    
    - Ubuntu 18.04 LTS
    
    Summary:
    
    OpenDMARC could allow signature bypass under certain conditions.
    
    Software Description:
    - opendmarc: Open Source implementation of the DMARC specification
    
    Details:
    
    It was discovered that OpenDMARC is prone to a signature-bypass vulnerability
    with multiple "From:" addresses. An attacker could use it to bypass spam and
    abuse filters.
    
    Update instructions:
    
    The problem can be corrected by updating your system to the following
    package versions:
    
    Ubuntu 18.04 LTS:
      libopendmarc2                   1.3.2-3ubuntu0.1
      opendmarc                       1.3.2-3ubuntu0.1
      rddmarc                         1.3.2-3ubuntu0.1
    
    In general, a standard system update will make all the necessary changes.
    
    References:
      https://usn.ubuntu.com/4567-1
      CVE-2019-16378
    
    Package Information:
      https://launchpad.net/ubuntu/+source/opendmarc/1.3.2-3ubuntu0.1
    

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