CVE-2019-19726
HIGH 7.8EPSS 3.5%
OpenBSD through 6.6 allows local users to escalate to root because a check for LD_LIBRARY_PATH in setuid programs can be defeated by setting a very small RLIMIT_DATA resource limit. When executing chpass or passwd (which are setuid root), _dl_setup_env in ld.so tries to strip LD_LIBRARY_PATH from the environment, but fails when it cannot allocate memory. Thus, the attacker is able to execute their own library code as root.
- CVSS v3.1 NVD
- 7.8 HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - CVSS v2.0 NVD
- 7.2 HIGH
AV:L/AC:L/Au:N/C:C/I:C/A:C - EPSS
- 3.52% chance of exploitation in the next 30 days, 89th percentile
- Published
- 2019-12-12
- Updated
- 2024-08-05
Proof-of-concept exploits (3)
- http://packetstormsecurity.com/files/155658/Qualys-Security-Advisory-OpenBSD-Dynamic-Load…
- http://seclists.org/fulldisclosure/2019/Dec/31
- https://seclists.org/bugtraq/2019/Dec/25
Metasploit modules (1)
ExploitDB entries (2)
Security advisories
- https://www.openbsd.org/errata66.html
- http://packetstormsecurity.com/files/155764/OpenBSD-Dynamic-Loader-chpass-Privilege-Escal…
- https://www.openwall.com/lists/oss-security/2019/12/11/9