CVE-2005-2640 – Juniper NetScreen 5.0 - VPN 'Username' Enumeration

https://notcve.org/view.php?id=CVE-2005-2640

20 Aug 2005 — Behavioral discrepancy information leak in Juniper Netscreen VPN running ScreenOS 5.2.0 and earlier, when using IKE with pre-shared key authentication, allows remote attackers to enumerate valid usernames via an IKE Aggressive Mode packet, which generates a response if the username is valid but does not respond when the username is invalid. • https://www.exploit-db.com/exploits/26168 •