Home/CVE/OpenBSD 6.6, in a non-default configuration where S/Key or YubiKey authentication is enabled, allows local users to beco
CVE

CVE-2019-19522

OpenBSD 6.6, in a non-default configuration where S/Key or YubiKey authentication is enabled, allows local users to beco

OpenBSD 6.6, in a non-default configuration where S/Key or YubiKey authentication is enabled, allows local users to become root by leveraging membership in the auth group. This occurs because root's file can be written to /etc/skey or /var/db/yubikey, and need not be owned by root.

HIGH · CVSS 7.8 EPSS 0.00198
Act now
  • Public exploit or PoC is available
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-732Incorrect Permission Assignment for Critical Resource
▤

Affected Products & Versions

1
openbsdall versions
⚠

Public Exploits & PoCs

1
pocpacketstormsecurity.com · Qualys-Security-Advisory-OpenBSD-Authentication-Bypass-Pr...packetstormsecurity.com
▣

Scoring & Timeline

7.8
HIGH · CVSS v3.1 · cve@mitre.org
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD05 Dec 2019 · 12:15 AM
CVSS VectorCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
🔗

References & Sources

5
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
http://seclists.org/fulldisclosure/2019/Dec/14Third Party Advisory
http://www.openwall.com/lists/oss-security/2019/12/04/5ExploitMailing ListThird Party Advisory
https://seclists.org/bugtraq/2019/Dec/8ExploitMailing ListThird Party Advisory
https://www.openbsd.org/errata66.htmlVendor Advisory
https://www.openwall.com/lists/oss-security/2019/12/04/5ExploitMailing ListThird Party Advisory
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