Netty is an asynchronous, event-driven network application framework. In versions prior to 4.1.129.Final and 4.2.8.Final, the `io.netty.handler.codec.http.HttpRequestEncoder` has a CRLF injection with the request URI when constructing a request. This leads to request smuggling when `HttpRequestEncoder` is used without proper sanitization of the URI. Any application / framework using `HttpRequestEncoder` can be subject to be abused to perform request smuggling using CRLF injection. Versions 4.1.129.Final and 4.2.8.Final fix the issue.
| Package (Ecosystem) | Introduced | Fixed | Limit |
|---|---|---|---|
| io.netty:netty-codec-http(Maven) | 4.2.0.Alpha1 | 4.2.8.Final | N/A |
| io.netty:netty-codec-http(Maven) | 0 | 4.1.129.Final | N/A |
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