CVE Vulnerability

CVE-2019-19726

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.

7.2 /10

CVSS v2.0 :

V3 Legend

Vector :

Exploitability : 3.9 / Impact : 10

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Confidentiality Impact COMPLETE

Integrity Impact COMPLETE

Availability Impact COMPLETE

Scope

7.8 /10

CVSS v3.0 : HIGH

V3 Legend

Vector :

Exploitability : 1.8 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
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
https://seclists.org/bugtraq/2019/Dec/25 Exploit Mailing List
http://packetstormsecurity.com/files/155658/Qualys-Security-Advisory-OpenBSD-Dynamic-Loader-Privilege-Escalation.html Exploit Third Party Advisory
http://seclists.org/fulldisclosure/2019/Dec/31 Exploit Mailing List
http://packetstormsecurity.com/files/155764/OpenBSD-Dynamic-Loader-chpass-Privilege-Escalation.html Third Party Advisory VDB Entry
Configurations

Configuration 1

cpe:2.3:o:openbsd:openbsd:*:*:*:*:*:*:*:*
Information

Published : 2019-12-12 01:15

Updated : 2023-01-30 08:00

NVD link : CVE-2019-19726

Mitre link : CVE-2019-19726

Products Affected
No products.
CWE
CWE-269