IKE Aggressive Mode Vulnerability: Username Exposure during Negotiation

CVE-2002-1623 · MEDIUM Severity

AV:N/AC:L/AU:N/C:P/I:N/A:N

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.

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