High severity · published Dec 5, 2019
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
7.8
CVSS
0.5%
EPSS
No
On KEV
Description
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 vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 40% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
OP
Openbsd · Openbsd
6.6 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2019-19522
CVE.org
https://www.cve.org/CVERecord?id=CVE-2019-19522
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
Exploit
http://www.openwall.com/lists/oss-security/2019/12/04/5
Exploit
https://seclists.org/bugtraq/2019/Dec/8
Vendor Advisory
https://www.openbsd.org/errata66.html
Exploit
https://www.openwall.com/lists/oss-security/2019/12/04/5
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