Description
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.
Metrics
CVSS 3.1 7.8/10
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HWeakness enumeration
Affected software
| Vendor | Product | Versions |
|---|---|---|
| n/a | n/a | n/a |
References
- http://packetstormsecurity.com/files/155572/Qualys-Security-Advisory-OpenBSD-Authentication-Bypass-Privilege-Escalation.htmlThird Party Advisory
- http://seclists.org/fulldisclosure/2019/Dec/14Third Party Advisory
- http://www.openwall.com/lists/oss-security/2019/12/04/5Exploit, Mailing List, Third Party Advisory
- https://seclists.org/bugtraq/2019/Dec/8Exploit, Mailing List, Third Party Advisory
- https://www.openbsd.org/errata66.htmlVendor Advisory
- https://www.openwall.com/lists/oss-security/2019/12/04/5Exploit, Mailing List, Third Party Advisory
- http://packetstormsecurity.com/files/155572/Qualys-Security-Advisory-OpenBSD-Authentication-Bypass-Privilege-Escalation.htmlThird Party Advisory
- http://seclists.org/fulldisclosure/2019/Dec/14Third Party Advisory
- http://www.openwall.com/lists/oss-security/2019/12/04/5Exploit, Mailing List, Third Party Advisory
- https://seclists.org/bugtraq/2019/Dec/8Exploit, Mailing List, Third Party Advisory
- https://www.openbsd.org/errata66.htmlVendor Advisory
- https://www.openwall.com/lists/oss-security/2019/12/04/5Exploit, Mailing List, Third Party Advisory
Timeline
- Published
- Dec 5, 2019
- Last modified
- Jun 17, 2026
- NVD status
- Modified