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.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alpine Linux | — | Upgrade openvpn-auth-ldap | Aug 8, 2025 | Jun 27, 2024 |
| Debian | — | Upgrade openvpn-auth-ldap | May 15, 2025 | Jun 27, 2024 |
| Freebsd | — | Upgrade openvpn-auth-ldap | Feb 14, 2025 | Feb 13, 2025 |
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