==========================================================================
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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