What’s Vulnerable › Vulnerabilities

CVE-2019-19522

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2019-12-05 · updated 2026-06-17
• Weakness: CWE-732

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.

Affected products

• OpenBSD: 6.6

References

• http://packetstormsecurity.com/files/155572/Qualys-Security-Advisory-OpenBSD-Authentication-Bypass-Privilege-Escalation.html
• http://seclists.org/fulldisclosure/2019/Dec/14
• http://www.openwall.com/lists/oss-security/2019/12/04/5
• https://seclists.org/bugtraq/2019/Dec/8
• https://www.openbsd.org/errata66.html
• https://www.openwall.com/lists/oss-security/2019/12/04/5
• http://packetstormsecurity.com/files/155572/Qualys-Security-Advisory-OpenBSD-Authentication-Bypass-Privilege-Escalation.html
• http://seclists.org/fulldisclosure/2019/Dec/14
• http://www.openwall.com/lists/oss-security/2019/12/04/5
• https://seclists.org/bugtraq/2019/Dec/8
• https://www.openbsd.org/errata66.html
• https://www.openwall.com/lists/oss-security/2019/12/04/5

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