#VU109287 Inclusion of Sensitive Information in Log Files in pam_tacplus - CVE-2020-13881
Published: May 17, 2025
Vulnerability identifier: #VU109287
Vulnerability risk: Medium
CVSSv4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:H/SI:L/SA:N/E:U/U:Green
CVE-ID: CVE-2020-13881
CWE-ID: CWE-532
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerable software:
pam_tacplus
pam_tacplus
Software vendor:
Paweł Krawczyk
Paweł Krawczyk
Description
The vulnerability allows a local user to gain access to sensitive information.
The
vulnerability exists due to software stores TACACS+ encryption key into
log file if the DEBUG loglevel and journald are used. A local user can read the log files and gain access to
sensitive data. This information can be used to decrypt communication
between the TACACS+ server and the end user, exposing authentication
credentials.
Remediation
Install updates from vendor's website.
External links
- https://github.com/kravietz/pam_tacplus/issues/149
- https://github.com/kravietz/pam_tacplus/commit/4a9852c31c2fd0c0e72fbb689a586aabcfb11cb0
- http://www.openwall.com/lists/oss-security/2020/06/08/1
- https://lists.debian.org/debian-lts-announce/2020/06/msg00007.html
- https://www.arista.com/en/support/advisories-notices/security-advisories/11705-security-advisory-50
- https://usn.ubuntu.com/4521-1/
- https://lists.debian.org/debian-lts-announce/2021/08/msg00006.html