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

To update your system, please follow these instructions:
https://wiki.ubuntu.com/Security/Upgrades.

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

References

* CVE-2020-13881

--- Mystic BBS v1.12 A46 (Linux/64)
* Origin: BZ&BZ BBS (21:4/110)