CVEvulnerability
CVE-2019-19726
7.8 HIGH
Official page ↗
- Status
- Modified
- Published
- 2019-12-12
- Last modified
- 2026-06-17
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 7.8 HIGH — CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- CVSS 2.0 ([email protected])
- 7.2 HIGH — AV:L/AC:L/Au:N/C:C/I:C/A:C
- Weaknesses
- CWE-269
Description
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.
Affected configurations
• openbsd openbsd (<= 6.6)
Related
Weakness · CWE (1)
- CWE-269 Improper Privilege Management weakness
References
- http://packetstormsecurity.com/files/155658/Qualys-Security-Advisory-OpenBSD-Dynamic-Loader-Privilege-Escalation.html Exploit, Third Party Advisory, VDB Entry
- http://packetstormsecurity.com/files/155764/OpenBSD-Dynamic-Loader-chpass-Privilege-Escalation.html Third Party Advisory, VDB Entry
- http://packetstormsecurity.com/files/174986/glibc-ld.so-Local-Privilege-Escalation.html packetstormsecurity.com
- http://seclists.org/fulldisclosure/2019/Dec/31 Exploit, Mailing List, Third Party Advisory
- http://seclists.org/fulldisclosure/2023/Oct/11 seclists.org
- http://www.openwall.com/lists/oss-security/2023/10/03/2 www.openwall.com
- https://seclists.org/bugtraq/2019/Dec/25 Exploit, Mailing List, Third Party Advisory
- https://www.openbsd.org/errata66.html Patch, Vendor Advisory
- https://www.openwall.com/lists/oss-security/2019/12/11/9 Mailing List, Third Party Advisory
- http://packetstormsecurity.com/files/155658/Qualys-Security-Advisory-OpenBSD-Dynamic-Loader-Privilege-Escalation.html Exploit, Third Party Advisory, VDB Entry
- http://packetstormsecurity.com/files/155764/OpenBSD-Dynamic-Loader-chpass-Privilege-Escalation.html Third Party Advisory, VDB Entry
- http://packetstormsecurity.com/files/174986/glibc-ld.so-Local-Privilege-Escalation.html packetstormsecurity.com
- http://seclists.org/fulldisclosure/2019/Dec/31 Exploit, Mailing List, Third Party Advisory
- http://seclists.org/fulldisclosure/2023/Oct/11 seclists.org
- http://www.openwall.com/lists/oss-security/2023/10/03/2 www.openwall.com
- https://seclists.org/bugtraq/2019/Dec/25 Exploit, Mailing List, Third Party Advisory
- https://www.openbsd.org/errata66.html Patch, Vendor Advisory
- https://www.openwall.com/lists/oss-security/2019/12/11/9 Mailing List, Third Party Advisory