CVE-2019-19521

EPSS 2.7%

Vexday Risk Score

3Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS —EPSS 2.7%KEV nãoPoC —Nuclei —Metasploit —Patch —

Lifecycle

04 Dec 2019Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

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 products

n/a · n/a

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References

http://packetstormsecurity.com/files/155572/Qualys-Security-Advisory-OpenBSD-Authentication-Bypass-Privilege-Escalation.html http://seclists.org/fulldisclosure/2019/Dec/14 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://www.openwall.com/lists/oss-security/2019/12/04/5 http://www.openwall.com/lists/oss-security/2019/12/04/6