PT-2019-15865 · Openbsd · Openbsd

Published 2019-12-04 · Updated 2020-08-24 · CVE-2019-19520

Positive Technologies (AI Summary)

CVSS v3.1

7.8

High

Base vector

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

Name of the Vulnerable Software and Affected Versions OpenBSD version 6.6

Description The issue allows local users to gain the privileges of the auth group by providing a LIBGL DRIVERS PATH environment variable. This is due to a mishandling of dlopen in xenocara/lib/mesa/src/loader/loader.c.

Recommendations For OpenBSD version 6.6, consider restricting access to the LIBGL DRIVERS PATH environment variable to prevent exploitation. As a temporary workaround, avoid using the LIBGL DRIVERS PATH variable until a patch is available.

Exploit

Fix

Incorrect Authorization

Weakness Enumeration

CWE-863

Related Identifiers

CVE-2019-19520

Affected Products

Openbsd

References · 11

• 🔥 https://github.com/retrymp3/Openbsd-Privilege-Escalation · Exploit
• 🔥 http://openwall.com/lists/oss-security/2019/12/04/5 · Exploit
• 🔥 https://openwall.com/lists/oss-security/2019/12/04/5 · Exploit
• 🔥 https://seclists.org/bugtraq/2019/Dec/8 · Exploit
• https://osv.dev/vulnerability/CVE-2019-19520 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2019-19520 · Security Note
• https://openbsd.org/errata66.html · Vendor Advisory
• https://t.me/thehackernews/550 · Telegram Post
• http://seclists.org/fulldisclosure/2019/Dec/14 · Note
• http://openwall.com/lists/oss-security/2019/12/04/6 · Note
• http://packetstormsecurity.com/files/155572/Qualys-Security-Advisory-OpenBSD-Authentication-Bypass-Privilege-Escalation.html · Note