VULNERABILITY INTELLIGENCE
CVE-2019-19521
CVSS score9.8 CRITICAL
EPSS probability2.74%
CISA KEVNot currently listed
Published2019-12-05
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
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).
Weakness classification
- CWE-287: Improper Authentication
Primary references
- cve@mitre.org — Third Party Advisory
- cve@mitre.org — Third Party Advisory
- cve@mitre.org — Exploit, Mailing List, Third Party Advisory
- cve@mitre.org — Mailing List
- cve@mitre.org — Exploit, Mailing List, Third Party Advisory
- cve@mitre.org — Vendor Advisory
- cve@mitre.org — Exploit, Mailing List, Third Party Advisory
- af854a3a-2127-422b-91ae-364da2661108 — Third Party Advisory
- af854a3a-2127-422b-91ae-364da2661108 — Third Party Advisory
- af854a3a-2127-422b-91ae-364da2661108 — Exploit, Mailing List, Third Party Advisory
- af854a3a-2127-422b-91ae-364da2661108 — Mailing List
- af854a3a-2127-422b-91ae-364da2661108 — Exploit, Mailing List, Third Party Advisory