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    Ubuntu 4406-1: Mailman vulnerability

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    Mailman could be made to inject arbitrary content in the login page if it received a specially crafted input.
    ==========================================================================
    Ubuntu Security Notice USN-4406-1
    June 29, 2020
    
    mailman vulnerability
    ==========================================================================
    
    A security issue affects these releases of Ubuntu and its derivatives:
    
    - Ubuntu 18.04 LTS
    - Ubuntu 16.04 LTS
    
    Summary:
    
    Mailman could be made to inject arbitrary content in the login page if it
    received a specially crafted input.
    
    Software Description:
    - mailman: Web-based mailing list manager (legacy branch)
    
    Details:
    
    It was discovered that Mailman incorrectly handled certain inputs.
    An attacker could possibly use this issue to inject arbitrary content
    in the login page.
    
    Update instructions:
    
    The problem can be corrected by updating your system to the following
    package versions:
    
    Ubuntu 18.04 LTS:
      mailman                         1:2.1.26-1ubuntu0.3
    
    Ubuntu 16.04 LTS:
      mailman                         1:2.1.20-1ubuntu0.6
    
    In general, a standard system update will make all the necessary changes.
    
    References:
      https://usn.ubuntu.com/4406-1
      CVE-2020-15011
    
    Package Information:
      https://launchpad.net/ubuntu/+source/mailman/1:2.1.26-1ubuntu0.3
      https://launchpad.net/ubuntu/+source/mailman/1:2.1.20-1ubuntu0.6
    

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