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CVE-2026-46705

CVE-2026-46705 · russh server userauth state is not reset when authentication principal changes

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

Russh is a Rust SSH client & server library. From version 0.34.0-beta.1 to before version 0.61.0, the russh server authentication path keeps internal userauth state across SSH_MSG_USERAUTH_REQUEST messages without separating that state when the request principal changes. RFC 4252 allows the user name and service name fields to change between authentication requests. The issue is not that such changes are invalid. The issue is that russh-owned authentication state, such as remaining methods, partial-success state, and in-progress method state, can remain associated with the connection and then influence a later request for a different (user, service). This is an internal library state mismatch. This issue has been patched in version 0.61.0.

CVSS 5.3 · Moyenne · EPSS 0,2% · Correctif disponible

Publication
Mise à jour

Pile logicielle: system

Produits et versions concernés

  • russh

    Versions du logiciel
    • >= 0.34.0-beta.1, < 0.61.0: Concernée

    Aucun correctif publié

  • rust-russh Debian:14

    Versions du logiciel
    • 0.57.1-1
    • 0.57.1-2
    Plages de versions concernées
    • ECOSYSTEM: < 0.64.1-1

    Mettez à jour vers 0.64.1-1

Sources originales

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