CVE-2024-28820: Threerings Openvpn-Auth-LDAP

Medium severity, CVSS 6.3. EPSS: 0.4% chance of exploitation in the next 30 days.

Buffer overflow in the extract_openvpn_cr function in openvpn-cr.c in openvpn-auth-ldap (aka the Three Rings Auth-LDAP plugin for OpenVPN) 2.0.4 allows attackers with a valid LDAP username and who can control the challenge/response password field to pass a string with more than 14 colons into this field and cause a buffer overflow.

Affected products

Published 2024-06-27. Last modified 2026-06-17.