CVE-2019-19522

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.

• CWE-732

• 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

Published

Dec 5, 2019

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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