Vulnerability Monitor

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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.

Security Impact Summary

This vulnerability carries a HIGH severity rating with a CVSS v3.1 score of 7.5, indicating it can be exploited remotely over the network with relatively low complexity without requiring user interaction and does not require pre-existing privileges . The vulnerability impacts confidentiality (data exposure), for affected systems. Impacting 4 products from pam_tacplus_project, from debian, from canonical and 1 other, organizations running these solutions should prioritize assessment and patching.

Historical Context

Reported in 2020, this vulnerability emerged during an era marked by increased sophistication in supply chain attacks, cloud infrastructure vulnerabilities, and software-as-a-service (SaaS) security challenges. Security practices during this period emphasized zero-trust architectures, container security, and API protection.

Published

2020-06-06T19:15:09.610

Last Modified

2024-11-21T05:02:04.000

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 7.5 (HIGH)

CVSSv2 Vector

AV:N/AC:M/Au:N/C:P/I:N/A:N

Access Vector: NETWORK
Access Complexity: MEDIUM
Authentication: NONE
Confidentiality Impact: PARTIAL
Integrity Impact: NONE
Availability Impact: NONE

Exploitability Score

8.6

Impact Score

2.9

Weaknesses

Type: Primary
CWE-532

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	pam_tacplus_project	pam_tacplus	≤ 1.5.1	Yes
Operating System	debian	debian_linux	8.0	Yes
Operating System	debian	debian_linux	9.0	Yes
Operating System	canonical	ubuntu_linux	16.04	Yes
Operating System	canonical	ubuntu_linux	18.04	Yes
Operating System	canonical	ubuntu_linux	20.04	Yes
Application	arista	cloudvision_portal	< 2020.1.2	Yes

References

http://www.openwall.com/lists/oss-security/2020/06/08/1 Mailing List, Patch, Third Party Advisory ([email protected])
https://github.com/kravietz/pam_tacplus/commit/4a9852c31c2fd0c0e72fbb689a586aabcfb11cb0 Patch, Third Party Advisory ([email protected])
https://github.com/kravietz/pam_tacplus/issues/149 Issue Tracking, Third Party Advisory ([email protected])
https://lists.debian.org/debian-lts-announce/2020/06/msg00007.html Mailing List, Third Party Advisory ([email protected])
https://lists.debian.org/debian-lts-announce/2021/08/msg00006.html Mailing List, Third Party Advisory ([email protected])
https://usn.ubuntu.com/4521-1/ Third Party Advisory ([email protected])
https://www.arista.com/en/support/advisories-notices/security-advisories/11705-security-advisory-50 Third Party Advisory ([email protected])
http://www.openwall.com/lists/oss-security/2020/06/08/1 Mailing List, Patch, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://github.com/kravietz/pam_tacplus/commit/4a9852c31c2fd0c0e72fbb689a586aabcfb11cb0 Patch, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://github.com/kravietz/pam_tacplus/issues/149 Issue Tracking, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://lists.debian.org/debian-lts-announce/2020/06/msg00007.html Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://lists.debian.org/debian-lts-announce/2021/08/msg00006.html Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://usn.ubuntu.com/4521-1/ Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://www.arista.com/en/support/advisories-notices/security-advisories/11705-security-advisory-50 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)

How SecUtils Interprets This CVE

SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For pam_tacplus_project's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.