UBUNTU-CVE-2021-21409

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UBUNTU-CVE-2021-21409

Summary:

Details: Netty is an open-source, asynchronous event-driven network application framework for rapid development of maintainable high performance protocol servers & clients. In Netty (io.netty:netty-codec-http2) before version 4.1.61.Final there is a vulnerability that enables request smuggling. The content-length header is not correctly validated if the request only uses a single Http2HeaderFrame with the endStream set to to true. This could lead to request smuggling if the request is proxied to a remote peer and translated to HTTP/1.1. This is a followup of GHSA-wm47-8v5p-wjpj/CVE-2021-21295 which did miss to fix this one case. This was fixed as part of 4.1.61.Final.

References: https://ubuntu.com/security/CVE-2021-21409, https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-21295, https://github.com/netty/netty/commit/b0fa4d5aab4215f3c22ce6123dd8dd5f38dc0432, https://github.com/netty/netty/security/advisories/GHSA-f256-j965-7f32, https://github.com/netty/netty/security/advisories/GHSA-wm47-8v5p-wjpj, https://ubuntu.com/security/notices/USN-6049-1, https://www.cve.org/CVERecord?id=CVE-2021-21409