CVE-2019-19522 json
OpenBSD 6.6, in a non-default configuration where S/Key or YubiKey authentication is enabled, allows local users to become root by leveragi…
published 6y ago modified 4mo ago also EUVD-2019-9140
- cvss
- 7.8
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.5%
- EPSS 0.5% chance of exploitation in 30 days, percentile 40%
- public exploits
- 0
- none known
Summary
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.
Is CVE-2019-19522 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.
Check with FencerExploit prediction
0.47% chance of exploitation in the next 30 days, higher than 40% of all scored CVEs (FIRST EPSS, 2026-11-09).
Exploits and checks
- openwall.com https://www.openwall.com/lists/oss-security/2019/12/04/5 referenced PoC, tagged "exploit" by a source, unverified
- openwall.com http://www.openwall.com/lists/oss-security/2019/12/04/5 referenced PoC, tagged "exploit" by a source, unverified
- seclists.org https://seclists.org/bugtraq/2019/Dec/8 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| NVD | 2.0 | 7.2 | AV:L/AC:L/Au:N/C:C/I:C/A:C |
Classification
- Weakness
-
- CWE-732 Incorrect Permission Assignment for Critical Resource
References
-
openwall.com
/lists/oss-security/2019/12/04/5
exploit, mailing-list, third-party-advisory
-
openwall.com
/lists/oss-security/2019/12/04/5
mailing-list, exploit, third-party-advisory
-
seclists.org
/bugtraq/2019/Dec/8
mailing-list, exploit, third-party-advisory
-
openbsd.org
/errata66.html
vendor-advisory
-
packetstormsecurity.com
/files/155572/Qualys-Security-Advisory-OpenBSD-Authentication-Bypass-Privilege-Escalation.html
third-party-advisory
-
seclists.org
/fulldisclosure/2019/Dec/14
mailing-list, third-party-advisory
Sources
- CVE List CVE-2019-19522
- NVD CVE-2019-19522
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.