CVE-2005-2640 Information

Description

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.

Reference

http://marc.info/?l=bugtraq&m=112438068426034&w=2 http://secunia.com/advisories/16474/ http://securitytracker.com/id?1014728 http://www.nta-monitor.com/news/vpn-flaws/juniper/netscreen/index.htm http://www.securityfocus.com/bid/14595