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mitmproxy -- Insufficient Protection against HTTP Request Smuggling

Description

Zeyu Zhang reports: In mitmproxy 7.0.4 and below, a malicious client or server is able to perform HTTP request smuggling attacks through mitmproxy. This means that a malicious client/server could smuggle a request/response through mitmproxy as part of another request/response's HTTP message body. While mitmproxy would only see one request, the target server would see multiple requests. A smuggled request is still captured as part of another request's body, but it does not appear in the request list and does not go through the usual mitmproxy event hooks, where users may have implemented custom access control checks or input sanitization. Unless you use mitmproxy to protect an HTTP/1 service, no action is required.


Affected Package


OS OS Version Package Name Package Version
FreeBSD any mitmproxy 8.0.0

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