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CVE-2026-55663

CVE-2026-55663 · mediasoup: SCTP state cookie lacks cryptographic authentication, enabling unauthorized association establishment (RFC 9260 violation)

Cette page présente des faits issus de sources publiques. Consultez l’avis original avant toute mise à jour.

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.

CVSS 5.6 · Moyenne · EPSS 0,2% · Correctif disponible

Publication
Mise à jour

Pile logicielle: node

Produits et versions concernés

  • mediasoup

    Versions du logiciel
    • >= 3.20.0, < 3.20.6: Concernée
    • >= 0.22.0, < 0.22.5: Concernée

    Aucun correctif publié

  • mediasoup npm

    Plages de versions concernées
    • SEMVER: ≥ 3.20.0, < 3.20.6

    Mettez à jour vers 3.20.6

  • mediasoup crates.io

    Plages de versions concernées
    • SEMVER: ≥ 0.22.0, < 0.22.5

    Mettez à jour vers 0.22.5

Sources originales

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