A libpam-tacplus security update has been released for Debian GNU/Linux 9 LTS to address an issue where shared secrets such as private server keys were being added in the clear to various logs.

DLA 2730-1: libpam-tacplus security update

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Debian LTS Advisory DLA-2730-1 debian-lts@lists.debian.org
  https://www.debian.org/lts/security/ Utkarsh Gupta
August 04, 2021   https://wiki.debian.org/LTS
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Package : libpam-tacplus
Version : 1.3.8-2+deb9u1
CVE ID : CVE-2020-13881
Debian Bug : 962830

It was discovered that there was an issue in libpam-tacplus (a
security module for using the TACACS+ authentication service) where
shared secrets such as private server keys were being added in
the clear to various logs.

For Debian 9 stretch, this problem has been fixed in version
1.3.8-2+deb9u1.

We recommend that you upgrade your libpam-tacplus packages.

For the detailed security status of libpam-tacplus please refer to
its security tracker page at:
  https://security-tracker.debian.org/tracker/libpam-tacplus

Further information about Debian LTS security advisories, how to apply
these updates to your system and frequently asked questions can be
found at:   https://wiki.debian.org/LTS