Title

The ALG must recognize only system-generated session identifiers. (Cat II impact)

Discussion

Network elements (depending on function) utilize sessions and session identifiers to control application behavior and user access. If an attacker can guess the session identifier, or can inject or manually insert session information, the valid user's application session can be compromised. Unique session IDs address man-in-the-middle attacks, including session hijacking or insertion of false information into a session. If the attacker is unable to identify or guess the session information related to pending application traffic, they will have more difficulty in hijacking the session or otherwise manipulating valid sessions. This requirement focuses on communications protection for the application session rather than for the network packet.

Check Content

Verify the ALG recognizes only system-generated session identifiers. If the ALG does not recognize only system-generated session identifiers, this is a finding.

Fix Text

Configure ALG to recognize only system-generated session identifiers.

Additional Identifiers

Rule ID: SV-68865r1_rule

Vulnerability ID: V-54619

Group Title: SRG-NET-000233-ALG-000115

Expert Comments

CCIs tied to check.

Controls tied to check. These are derived from the CCIs shown above.