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    Ubuntu 4521-1: pam_tacplus vulnerability

    Date
    168
    Posted By
    pam_tacplus could be made to expose sensitive information.
    ==========================================================================
    Ubuntu Security Notice USN-4521-1
    September 21, 2020
    
    libpam-tacplus vulnerability
    ==========================================================================
    
    A security issue affects these releases of Ubuntu and its derivatives:
    
    - Ubuntu 20.04 LTS
    - Ubuntu 18.04 LTS
    - Ubuntu 16.04 LTS
    
    Summary:
    
    pam_tacplus could be made to expose sensitive information.
    
    Software Description:
    - libpam-tacplus: PAM module for using TACACS+ as an authentication service
    
    Details:
    
    It was discovered that pam_tacplus did not properly manage shared
    secrets if DEBUG loglevel and journald are used. A remote attacker could
    use this issue to expose sensitive information.
    
    Update instructions:
    
    The problem can be corrected by updating your system to the following
    package versions:
    
    Ubuntu 20.04 LTS:
      libpam-tacplus                  1.3.8-2+deb8u1build0.20.04.1
    
    Ubuntu 18.04 LTS:
      libpam-tacplus                  1.3.8-2+deb8u1build0.18.04.1
    
    Ubuntu 16.04 LTS:
      libpam-tacplus                  1.3.8-2+deb8u1build0.16.04.1
    
    In general, a standard system update will make all the necessary changes.
    
    References:
      https://usn.ubuntu.com/4521-1
      CVE-2020-13881
    
    Package Information:
    
    https://launchpad.net/ubuntu/+source/libpam-tacplus/1.3.8-2+deb8u1build0.20.04.1
    
    https://launchpad.net/ubuntu/+source/libpam-tacplus/1.3.8-2+deb8u1build0.18.04.1
    
    https://launchpad.net/ubuntu/+source/libpam-tacplus/1.3.8-2+deb8u1build0.16.04.1
    
    

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