Local Privilege Escalation in OpenBSD’s dynamic loader

Overview :
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 Product(s) :
  • OpenBSD through 6.6
Vulnerability Details :
CVE ID : CVE-2019-19726
We discovered a Local Privilege Escalation in OpenBSD’s dynamic loader (ld.so): this vulnerability is exploitable in the default installation (via the set-user-ID executable chpass or passwd) and yields full root privileges.

We developed a simple proof of concept and successfully tested it against OpenBSD 6.6 (the current release), 6.5, 6.2, and 6.1, on both amd64 and i386; other releases and architectures are probably also exploitable.

Solution :

Upgrade to latest version of OpenBSD

Common Vulnerabilityies and Exposures

Contact us to get started

CVE-2025-23208 : ZOT UP TO 2.1.1 API SETUSERGROUPS PRIVILEGES MANAGEMENT

CVE-2025-23208 : ZOT UP TO 2.1.1 API SETUSERGROUPS PRIVILEGES MANAGEMENT

Description zot is a production-ready vendor-neutral OCI image registry. The group data stored for users in the boltdb database (meta.db)

CVE-2024-12867 : ARCTIC SECURITY ARCTIC HUB UP TO 5.5.1872 CONFIGURATION SERVER-SIDE REQUEST FORGERY

CVE-2024-12867 : ARCTIC SECURITY ARCTIC HUB UP TO 5.5.1872 CONFIGURATION SERVER-SIDE REQUEST FORGERY

Description Server-Side Request Forgery in URL Mapper in Arctic Security’s Arctic Hub versions 3.0.1764-5.6.1877 allows an unauthenticated remote attacker to

CVE-2024-12840 : RED HAT SATELLITE HTTP PROXY SERVER-SIDE REQUEST FORGERY

CVE-2024-12840 : RED HAT SATELLITE HTTP PROXY SERVER-SIDE REQUEST FORGERY

Description A server-side request forgery exists in Satellite. When a PUT HTTP request is made to /http_proxies/test_connection, when supplied with