CVE-2020-13881

In support.c in pam_tacplus 1.3.8 through 1.5.1, the TACACS+ shared secret gets logged via syslog if the DEBUG loglevel and journald are used.

Weakness

Information written to log files can be of a sensitive nature and give valuable guidance to an attacker or expose sensitive user information.

Affected Software

Extended Description

While logging all information may be helpful during development stages, it is important that logging levels be set appropriately before a product ships so that sensitive user data and system information are not accidentally exposed to potential attackers. Different log files may be produced and stored for:

Potential Mitigations

Related Attack Patterns

• https://cwe.mitre.org/data/definitions/215.html

References

• http://www.openwall.com/lists/oss-security/2020/06/08/1
• https://github.com/kravietz/pam_tacplus/commit/4a9852c31c2fd0c0e72fbb689a586aabcfb11cb0
• https://github.com/kravietz/pam_tacplus/issues/149
• https://lists.debian.org/debian-lts-announce/2020/06/msg00007.html
• https://lists.debian.org/debian-lts-announce/2021/08/msg00006.html
• https://usn.ubuntu.com/4521-1/
• https://www.arista.com/en/support/advisories-notices/security-advisories/11705-security-advisory-50