HIGH
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
Published Dec 12, 2019
7.8
HIGHCVSS 3.1
EPSS 3.52%
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 products
Remediation
No remediation recorded yet.
Weaknesses (1)
References (9)
- http://packetstormsecurity.com/files/155658/Qualys-Security-Advisory-OpenBSD-Dynamic-Loader-Privilege-Escalation.html ExploitThird Party AdvisoryVDB Entry
- http://packetstormsecurity.com/files/155764/OpenBSD-Dynamic-Loader-chpass-Privilege-Escalation.html Third Party AdvisoryVDB Entry
- http://packetstormsecurity.com/files/174986/glibc-ld.so-Local-Privilege-Escalation.html
- http://seclists.org/fulldisclosure/2019/Dec/31 mailing-listExploitMailing ListThird Party Advisory
- http://seclists.org/fulldisclosure/2023/Oct/11 mailing-list
- http://www.openwall.com/lists/oss-security/2023/10/03/2 mailing-list
- https://seclists.org/bugtraq/2019/Dec/25 mailing-listExploitMailing ListThird Party Advisory
- https://www.openbsd.org/errata66.html PatchVendor Advisory
- https://www.openwall.com/lists/oss-security/2019/12/11/9 Mailing ListThird Party Advisory
| Link | Providers | Tags |
|---|---|---|
| http://packetstormsecurity.com/files/155658/Qualys-Security-Advisory-OpenBSD-Dynamic-Loader-Privilege-Escalation.html | ExploitThird Party AdvisoryVDB Entry | |
| http://packetstormsecurity.com/files/155764/OpenBSD-Dynamic-Loader-chpass-Privilege-Escalation.html | Third Party AdvisoryVDB Entry | |
| http://packetstormsecurity.com/files/174986/glibc-ld.so-Local-Privilege-Escalation.html | ||
| http://seclists.org/fulldisclosure/2019/Dec/31 | mailing-listExploitMailing ListThird Party Advisory | |
| http://seclists.org/fulldisclosure/2023/Oct/11 | mailing-list | |
| http://www.openwall.com/lists/oss-security/2023/10/03/2 | mailing-list | |
| https://seclists.org/bugtraq/2019/Dec/25 | mailing-listExploitMailing ListThird Party Advisory | |
| https://www.openbsd.org/errata66.html | PatchVendor Advisory | |
| https://www.openwall.com/lists/oss-security/2019/12/11/9 | Mailing ListThird Party Advisory |
Change history (0)
No recorded changes yet.
Sources
CVE.org / MITRE
Status PUBLISHED
Assigner mitre
Published Dec 12, 2019
Updated Aug 5, 2024
Reserved Dec 11, 2019
Link CVE-2019-19726
CISA Vulnrichment
Updated n/a