USN-4521-1: pam_tacplus vulnerability

Releases

• Ubuntu 20.04 LTS
• Ubuntu 18.04 ESM
• Ubuntu 16.04 ESM

Packages

• 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

• libpam-tacplus - 1.3.8-2+deb8u1build0.20.04.1

Ubuntu 18.04

• libpam-tacplus - 1.3.8-2+deb8u1build0.18.04.1

Ubuntu 16.04

• libpam-tacplus - 1.3.8-2+deb8u1build0.16.04.1

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

References

• CVE-2020-13881