Exposure of Sensitive Information to an Unauthorized Actor
The ISAKMP implementation on Cisco Adaptive Security Appliances (ASA) devices generates different responses for IKE aggressive-mode messages depending on whether invalid VPN groups are specified, which allows remote attackers to enumerate groups via a series of messages, aka Bug ID CSCue73708.
CWE-200 - Information Exposure
An information exposure vulnerability is categorized as an information flow (IF) weakness, which can potentially allow unauthorized access to otherwise classified information in the application, such as confidential personal information (demographics, financials, health records, etc.), business secrets, and the application's internal environment.