CWE-437: Incomplete Model of Endpoint Features
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Edit Custom FilterA product acts as an intermediary or monitor between two or more endpoints, but it does not have a complete model of an endpoint's features, behaviors, or state, potentially causing the product to perform incorrect actions based on this incomplete model.
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Example 1 HTTP request smuggling is an attack against an intermediary such as a proxy. This attack works because the proxy expects the client to parse HTTP headers one way, but the client parses them differently. Example 2 Anti-virus products that reside on mail servers can suffer from this issue if they do not know how a mail client will handle a particular attachment. The product might treat an attachment type as safe, not knowing that the client's configuration treats it as executable. ![]()
Relationship
This can be related to interaction errors, although in some cases, one of the endpoints is not performing correctly according to specification.
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