CyberRota Analysis
AI-GeneratedThe mediasoup WebRTC video conferencing system is vulnerable due to its SCTP stack, which improperly authenticates state cookies using hardcoded values instead of a unique instance secret and HMAC. This flaw allows an on-path attacker to forge COOKIE-ECHO packets, potentially establishing unauthorized SCTP associations and injecting DataChannel messages as if they were a trusted peer. Organizations using affected versions (3.20.0 to 3.20.6 for npm and 0.22.0 to 0.22.5 for Rust) should prioritize patching to mitigate the risk of unauthorized access and data manipulation.
Public Exploit Signal
A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.
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Original NVD Description
mediasoup is a WebRTC video conferencing system. From version 3.20.0 until 3.20.6 for the npm package and from 0.22.0 until 0.22.5 for the Rust crate, mediasoup's built-in SCTP stack authenticates state cookies using only the hardcoded msworker and 0xAD81 magic values instead of a per-instance secret and HMAC, contrary to RFC 9260 Section 5.1.3. The cookie structure and validation in worker/include/RTC/SCTP/association/StateCookie.hpp and worker/src/RTC/SCTP/association/StateCookie.cpp allow an on-path attacker targeting PlainTransport or PipeTransport with SCTP enabled and without DTLS protection to forge a COOKIE-ECHO whose packet verification tag matches the attacker-controlled localVerificationTag. The forged cookie passes StateCookie::IsMediasoupStateCookie() and Association::HandleReceivedCookieEchoChunk(), establishes an unauthorized SCTP association, and permits DataChannel message injection as a trusted peer. WebRtcTransport is not affected because its SCTP runs inside DTLS. This issue is fixed in npm version 3.20.6 and Rust crate version 0.22.5.