CVEvulnerability
CVE-2019-19521
9.8 CRITICAL
Official page ↗
- Status
- Modified
- Published
- 2019-12-05
- Last modified
- 2026-06-17
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 9.8 CRITICAL — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- CVSS 2.0 ([email protected])
- 7.5 HIGH — AV:N/AC:L/Au:N/C:P/I:P/A:P
- Weaknesses
- CWE-287
Description
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).
Affected configurations
• openbsd openbsd 6.6
Related
Weakness · CWE (1)
- CWE-287 Improper Authentication weakness
References
- http://packetstormsecurity.com/files/155572/Qualys-Security-Advisory-OpenBSD-Authentication-Bypass-Privilege-Escalation.html Third Party Advisory
- http://seclists.org/fulldisclosure/2019/Dec/14 Third Party Advisory
- http://www.openwall.com/lists/oss-security/2019/12/04/5 Exploit, Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2019/12/04/6 Mailing List
- https://seclists.org/bugtraq/2019/Dec/8 Exploit, Mailing List, Third Party Advisory
- https://www.openbsd.org/errata66.html Vendor Advisory
- https://www.openwall.com/lists/oss-security/2019/12/04/5 Exploit, Mailing List, Third Party Advisory
- http://packetstormsecurity.com/files/155572/Qualys-Security-Advisory-OpenBSD-Authentication-Bypass-Privilege-Escalation.html Third Party Advisory
- http://seclists.org/fulldisclosure/2019/Dec/14 Third Party Advisory
- http://www.openwall.com/lists/oss-security/2019/12/04/5 Exploit, Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2019/12/04/6 Mailing List
- https://seclists.org/bugtraq/2019/Dec/8 Exploit, Mailing List, Third Party Advisory
- https://www.openbsd.org/errata66.html Vendor Advisory
- https://www.openwall.com/lists/oss-security/2019/12/04/5 Exploit, Mailing List, Third Party Advisory