Linux Security
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    Linux Security

    Ubuntu: USN-4517-1 Email-Address-List vulnerability

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    Email-Address-List could be made to remotely exhaust resources if it received specially crafted email data.
    ==========================================================================
    Ubuntu Security Notice USN-4517-1
    September 17, 2020
    
    libemail-address-list-perl vulnerability
    ==========================================================================
    
    A security issue affects these releases of Ubuntu and its derivatives:
    
    - Ubuntu 18.04 LTS
    - Ubuntu 16.04 LTS
    
    Summary:
    
    Email-Address-List could be made to remotely exhaust resources if it
    received specially crafted email data.
    
    Software Description:
    - libemail-address-list-perl: RFC close address list parsing
    
    Details:
    
    It was discovered that Email-Address-List does not properly parse email
    addresses during email-ingestion. A remote attacker could use this issue
    to cause an algorithmic complexity attack, resulting in a denial of
    service. (CVE-2018-18898)
    
    Update instructions:
    
    The problem can be corrected by updating your system to the following
    package versions:
    
    Ubuntu 18.04 LTS:
      libemail-address-list-perl      0.05-1+deb9u1build0.18.04.1
    
    Ubuntu 16.04 LTS:
      libemail-address-list-perl      0.05-1+deb9u1build0.16.04.1
    
    In general, a standard system update will make all the necessary changes.
    
    References:
      https://usn.ubuntu.com/4517-1
      CVE-2018-18898
    
    Package Information:
    
    https://launchpad.net/ubuntu/+source/libemail-address-list-perl/0.05-1+deb9u1build0.18.04.1
    
    https://launchpad.net/ubuntu/+source/libemail-address-list-perl/0.05-1+deb9u1build0.16.04.1
    
    

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