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CWE - 444 : Inconsistent Interpretation of HTTP Requests ('HTTP Request Smuggling')

CWE Definition http://cwe.mitre.org/data/definitions/444.html
Number of vulnerabilities: 7
Description When malformed or abnormal HTTP requests are interpreted by one or more entities in the data flow between the user and the web server, such as a proxy or firewall, they can be interpreted inconsistently, allowing the attacker to "smuggle" a request to one device without the other device being aware of it.
Background Details
Other Notes Request smuggling can be performed due to a multiple interpretation error, where the target is an intermediary or monitor, via a consistency manipulation (Transfer-Encoding and Content-Length headers).

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