In support.c in pam_tacplus 1.3.8 through 1.5.1, the TACACS+ shared secret gets logged…
Priority LOW 36CWE-532Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Information disclosure
- Confidentiality · integrity · availability
- High · None · None
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-532.
Summary
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.
Why it matters now
EPSS 0.01715 77th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 7
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:pam_tacplus_project:pam_tacplus:*:*:*:*:*:*:*:* | 1.3.8 – 1.5.1 | Vulnerable | Pam Tacplus Project |
| cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:* | 8.0 | Vulnerable | Debian |
| cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* | 9.0 | Vulnerable | Debian |
| cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:esm:*:*:* | 16.04 | Vulnerable | Canonical |
| cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:* | 18.04 | Vulnerable | Canonical |
| cpe:2.3:o:canonical:ubuntu_linux:20.04:*:*:*:lts:*:*:* | 20.04 | Vulnerable | Canonical |
| cpe:2.3:a:arista:cloudvision_portal:*:*:*:*:*:*:*:* | before 2020.1.2 | Vulnerable | Arista |
- cpe:2.3:a:pam_tacplus_project:pam_tacplus:*:*:*:*:*:*:*:* Versions 1.3.8 – 1.5.1 Vulnerable ·Pam Tacplus Project
- cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:* Versions 8.0 Vulnerable ·Debian
- cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* Versions 9.0 Vulnerable ·Debian
- cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:esm:*:*:* Versions 16.04 Vulnerable ·Canonical
- cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:* Versions 18.04 Vulnerable ·Canonical
- cpe:2.3:o:canonical:ubuntu_linux:20.04:*:*:*:lts:*:*:* Versions 20.04 Vulnerable ·Canonical
- cpe:2.3:a:arista:cloudvision_portal:*:*:*:*:*:*:*:* Versions before 2020.1.2 Vulnerable ·Arista
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2020-13881
- 2026-10-03 Alias added: GHSA-gm22-vmf2-hwxg
References
Patch 2
Advisory 5
- https://github.com/kravietz/pam_tacplus/issues/149
- [debian-lts-announce] 20200608 [SECURITY] [DLA 2239-1] libpam-tacplus security update
- https://www.arista.com/en/support/advisories-notices/security-advisories/11705-security-advisory-50
- USN-4521-1
- [debian-lts-announce] 20210804 [SECURITY] [DLA 2730-1] libpam-tacplus security update
Sources
- CVE-2020-13881 · CVE Program
- CVE-2020-13881 · NVD
- FIRST EPSS
- GHSA-gm22-vmf2-hwxg · GitHub Advisory Database · CC BY 4.0
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