cve/2019/CVE-2019-19522.md

CVE-2019-19522

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.

POC

Reference

• http://packetstormsecurity.com/files/155572/Qualys-Security-Advisory-OpenBSD-Authentication-Bypass-Privilege-Escalation.html

Github

• https://github.com/0xT11/CVE-POC
• https://github.com/bcoles/local-exploits
• https://github.com/retrymp3/Openbsd-Privilege-Escalation