CVSS 3.1
9.8 criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HCVE-2019-19521
Critical (9.8) in openbsd openbsd. EPSS 2.7% chance of exploitation in the next 30 days.
libc in OpenBSD 6.6 allows authentication bypass via the -schallenge username, as demonstrated by smtpd, ldapd, or radiusd. This is related to gen/auth_subr.c and gen/authenticate.c in libc (and login/login.c and xenocara/app/xenodm/greeter/verify.c).
Severity
- EPSS
- 2.7% chance of exploitation in the next 30 days; higher than 86% of CVEs (scores of 2026-11-01)
- CWE
- CWE-287
- Published
- Modified
- Record from
- the NVD, synced
Affected
- openbsd:openbsd
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
- http://www.openwall.com/lists/oss-security/2019/12/04/6
- https://seclists.org/bugtraq/2019/Dec/8