Vulnerability Monitor

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CVE-2019-19522

OpenBSD 6.6, in a non-default configuration where S/Key or YubiKey authentication is enabled, allows local users to become root by leveraging membership in the auth group. This occurs because root's file can be written to /etc/skey or /var/db/yubikey, and need not be owned by root.

Published

2019-12-05T00:15:11.497

Last Modified

2024-11-21T04:34:52.990

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 7.8 (HIGH)

CVSSv2 Vector

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

Access Vector: LOCAL
Access Complexity: LOW
Authentication: NONE
Confidentiality Impact: COMPLETE
Integrity Impact: COMPLETE
Availability Impact: COMPLETE

Exploitability Score

3.9

Impact Score

10.0

Weaknesses

Type: Primary
CWE-732

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])
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)
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)