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.

CVSS v3 7.8 HIGH
CVSS v2.0 7.2 HIGH

7.8^/10

CVSS v3 : HIGH

Vector :

Exploitability : 1.8 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

7.2^/10

CVSS v2.0 : HIGH

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

Exploitability : 3.9 / Impact : 10.0

Access Vector LOCAL

Access Complexity LOW

Authentication NONE

Confidentiality Impact COMPLETE

Integrity Impact COMPLETE

Availability Impact COMPLETE

References

Link	Resource
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
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
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

Configurations

Configuration 1 (hide)

cpe:2.3:o:openbsd:openbsd:6.6:*:*:*:*:*:*:*

History

No history.

Information

Published : 2019-12-05 00:15

Updated : 2024-11-21 04:34

NVD link : CVE-2019-19522

Mitre link : CVE-2019-19522

CVE.ORG link : CVE-2019-19522

JSON object : View

Products Affected

openbsd

openbsd

CWE

CWE-732

Incorrect Permission Assignment for Critical Resource

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