CVE-2019-19726
38Vexday Risk Score
Patch soon. It has a working public exploit.
ssvc Attendepss 3.5%
from disclosure to weapon4 days
Published on NVDDec 12
1st PoC+4d
metasploitDec 11
exploitation probability
3.5%top 12% of all CVEs
observed exploitation
nono source reports it
5 public exploit(s)
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
n/a · n/apublic PoCs found — 5✓ VexDay Proof
exploitdb✓ VexDay Proofwww.exploit-db.com/exploits/47803exploitdb✓ VexDay Proofwww.exploit-db.com/exploits/47780cve_referencepacketstormsecurity.com/files/155658/Qualys-Security-Advisory-OpenBSD-Dynamic-Loader-Privilege-Escalation.htmlunverifiedcve_referencepacketstormsecurity.com/files/155764/OpenBSD-Dynamic-Loader-chpass-Privilege-Escalation.htmlunverifiedcve_referencepacketstormsecurity.com/files/174986/glibc-ld.so-Local-Privilege-Escalation.htmlunverified⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.
References
http://packetstormsecurity.com/files/155658/Qualys-Security-Advisory-OpenBSD-Dynamic-Loader-Privilege-Escalation.htmlhttp://packetstormsecurity.com/files/155764/OpenBSD-Dynamic-Loader-chpass-Privilege-Escalation.htmlhttp://packetstormsecurity.com/files/174986/glibc-ld.so-Local-Privilege-Escalation.htmlhttp://seclists.org/fulldisclosure/2019/Dec/31http://seclists.org/fulldisclosure/2023/Oct/11https://seclists.org/bugtraq/2019/Dec/25https://www.openbsd.org/errata66.htmlhttps://www.openwall.com/lists/oss-security/2019/12/11/9http://www.openwall.com/lists/oss-security/2023/10/03/2