CVE - CVE-2019-19726

CVE-ID
CVE-2019-19726	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
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.
References
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
BUGTRAQ:20191212 Local Privilege Escalation in OpenBSD's dynamic loader (CVE-2019-19726) URL:https://seclists.org/bugtraq/2019/Dec/25 CONFIRM:https://www.openbsd.org/errata66.html FULLDISC:20191213 Local Privilege Escalation in OpenBSD's dynamic loader (CVE-2019-19726) URL:http://seclists.org/fulldisclosure/2019/Dec/31 FULLDISC:20231005 CVE-2023-4911: Local Privilege Escalation in the glibc's ld.so URL:http://seclists.org/fulldisclosure/2023/Oct/11 MISC:http://packetstormsecurity.com/files/155658/Qualys-Security-Advisory-OpenBSD-Dynamic-Loader-Privilege-Escalation.html MISC:http://packetstormsecurity.com/files/155764/OpenBSD-Dynamic-Loader-chpass-Privilege-Escalation.html MISC:http://packetstormsecurity.com/files/174986/glibc-ld.so-Local-Privilege-Escalation.html MISC:https://www.openwall.com/lists/oss-security/2019/12/11/9 MLIST:[oss-security] 20231003 CVE-2023-4911: Local Privilege Escalation in the glibc's ld.so URL:http://www.openwall.com/lists/oss-security/2023/10/03/2
Assigning CNA
MITRE Corporation
Date Record Created
20191211	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20191211)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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