CVE-2019-19519

Name: CVE-2019-19519
Creator: NVD / NIST
Published: 2019-12-05T00:15:11.247+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.8/10EPSS 0.39%

Last modified Jun 17, 2026

CVE-2019-19519 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. In OpenBSD 6.6, local users can use the su -L option to achieve any login class (often excluding root) because there is a logic error in the main function in su/su.c.. EPSS estimates a 0.39% chance of exploitation in the next 30 days.

Description

In OpenBSD 6.6, local users can use the su -L option to achieve any login class (often excluding root) because there is a logic error in the main function in su/su.c.

Metrics

CVSS 3.1

7.8/10

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

0.39%

31.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-287

Affected Software

Vendor	Product	Versions
Openbsd	Openbsd	6.6

References

http://packetstormsecurity.com/files/155572/Qualys-Security-Advisory-OpenBSD-Authentication-Bypass-Privilege-Escalation.htmlThird Party Advisory
http://seclists.org/fulldisclosure/2019/Dec/14Third Party Advisory
http://www.openwall.com/lists/oss-security/2019/12/04/5Exploit, Mailing List, Third Party Advisory
https://github.com/openbsd/src/blob/2dfc98f42e117c7605b52b5020b630d98601dc22/usr.bin/su/su.c#L210-L211Third Party Advisory
https://seclists.org/bugtraq/2019/Dec/8Exploit, Mailing List, Third Party Advisory
https://www.openbsd.org/errata66.htmlVendor Advisory
https://www.openwall.com/lists/oss-security/2019/12/04/5Exploit, Mailing List, Third Party Advisory
http://packetstormsecurity.com/files/155572/Qualys-Security-Advisory-OpenBSD-Authentication-Bypass-Privilege-Escalation.htmlThird Party Advisory
http://seclists.org/fulldisclosure/2019/Dec/14Third Party Advisory
http://www.openwall.com/lists/oss-security/2019/12/04/5Exploit, Mailing List, Third Party Advisory
https://github.com/openbsd/src/blob/2dfc98f42e117c7605b52b5020b630d98601dc22/usr.bin/su/su.c#L210-L211Third Party Advisory
https://seclists.org/bugtraq/2019/Dec/8Exploit, Mailing List, Third Party Advisory
https://www.openbsd.org/errata66.htmlVendor Advisory
https://www.openwall.com/lists/oss-security/2019/12/04/5Exploit, Mailing List, Third Party Advisory

Timeline

Published: Dec 5, 2019
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2019-19519?

In OpenBSD 6.6, local users can use the su -L option to achieve any login class (often excluding root) because there is a logic error in the main function in su/su.c.

How severe is CVE-2019-19519?

CVE-2019-19519 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 0.39% probability of exploitation in the next 30 days.

How do I fix CVE-2019-19519?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2019-19519?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST