Vulnerability Monitor

The vendors, products, and vulnerabilities you care about

CVE-2019-19521

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).

Published

2019-12-05T00:15:11.400

Last Modified

2024-11-21T04:34:52.850

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 9.8 (CRITICAL)

CVSSv2 Vector

AV:N/AC:L/Au:N/C:P/I:P/A:P

Access Vector: NETWORK
Access Complexity: LOW
Authentication: NONE
Confidentiality Impact: PARTIAL
Integrity Impact: PARTIAL
Availability Impact: PARTIAL

Exploitability Score

10.0

Impact Score

6.4

Weaknesses

Type: Primary
CWE-287

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Operating System	openbsd	openbsd	6.6	Yes

References

http://packetstormsecurity.com/files/155572/Qualys-Security-Advisory-OpenBSD-Authentication-Bypass-Privilege-Escalation.html Third Party Advisory ([email protected])
http://seclists.org/fulldisclosure/2019/Dec/14 Third Party Advisory ([email protected])
http://www.openwall.com/lists/oss-security/2019/12/04/5 Exploit, Mailing List, Third Party Advisory ([email protected])
http://www.openwall.com/lists/oss-security/2019/12/04/6 Mailing List ([email protected])
https://seclists.org/bugtraq/2019/Dec/8 Exploit, Mailing List, Third Party Advisory ([email protected])
https://www.openbsd.org/errata66.html Vendor Advisory ([email protected])
https://www.openwall.com/lists/oss-security/2019/12/04/5 Exploit, Mailing List, Third Party Advisory ([email protected])
http://packetstormsecurity.com/files/155572/Qualys-Security-Advisory-OpenBSD-Authentication-Bypass-Privilege-Escalation.html Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://seclists.org/fulldisclosure/2019/Dec/14 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://www.openwall.com/lists/oss-security/2019/12/04/5 Exploit, Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://www.openwall.com/lists/oss-security/2019/12/04/6 Mailing List (af854a3a-2127-422b-91ae-364da2661108)
https://seclists.org/bugtraq/2019/Dec/8 Exploit, Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://www.openbsd.org/errata66.html Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://www.openwall.com/lists/oss-security/2019/12/04/5 Exploit, Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)