Description
The design of the Internet Key Exchange (IKE) protocol, when using Aggressive Mode for shared secret authentication, does not encrypt initiator or responder identities during negotiation, which may allow remote attackers to determine valid usernames by (1) monitoring responses before the password is supplied or (2) sniffing, as originally reported for FireWall-1 SecuRemote.
References
- 20020903 Check Point statement on use of IKE Aggressive Mode mailing-list
- 20020911 RE: SecuRemote usernames can be guessed or sniffed using IKE mailing-list
- 5607 vdb-entry
- VU#886601 third-party-advisory
- http://www.nta-monitor.com/news/checkpoint.htm
- http://www.checkpoint.com/techsupport/alerts/ike.html
- 20020903 SecuRemote usernames can be guessed or sniffed using IKE exchange mailing-list
- 20020905 RE: SecuRemote usernames can be guessed or sniffed using IKE exchange mailing-list
- fw1-ike-username-enumeration(10034) vdb-entry
- http://www.securiteam.com/securitynews/5TP040U8AW.html