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USN-4521-1: pam_tacplus vulnerability

21 September 2020

pam_tacplus could be made to expose sensitive information.



  • libpam-tacplus - PAM module for using TACACS+ as an authentication service


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
Ubuntu 18.04
Ubuntu 16.04

In general, a standard system update will make all the necessary changes.