The ALG must recognize only system-generated session identifiers.
Overview
Finding ID
Version
Rule ID
IA Controls
Severity
V-204959
SRG-NET-000233-ALG-000115
SV-204959r396012_rule
Medium
Description
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.