Le prix de Zcash bondit de plus de 10 % après la correction du bug Orchard qui restaure le réseau

Le prix de Zcash a augmenté de plus de 10 % après que la Zcash Foundation ait publié des mises à jour d'urgence de Zebra pour corriger un bug critique dans Orchard et restaurer les fonctions complètes du réseau. Cette mesure a été prise après que des développeurs aient confirmé une vulnérabilité de solidité dans le circuit de preuve à divulgation nulle de connaissance Orchard, entraînant une réponse de sécurité rapide à travers l'écosystème.

La Fondation a publié Zebra 4.5.3 et Zebra 5.0.0 pour résoudre le problème. Zebra 4.5.3 a introduit un soft fork d'urgence qui a temporairement désactivé les actions Orchard, tandis que Zebra 5.0.0 a activé NU6.2 et réactivé Orchard avec le circuit corrigé.

ZEC a attiré une forte attention du marché après que la Fondation a confirmé que le correctif de l'erreur Orchard était en ligne.Le token a augmenté de plus de 10 %, même si le marché crypto dans son ensemble restait sous pression. Ce rallye reflète une confiance renouvelée du marché après que les développeurs aient rétabli le pool Orchard.

Selon la Fondation, les opérateurs de nœuds doivent mettre à jour vers Zebra 5.0.0 dès que possible. Les opérateurs incapables de passer à la version 5.0.0 avant la hauteur d'activation de NU6.2 ont été invités à utiliser Zebra 4.5.3 pour rester sur la bonne chaîne pendant la fenêtre de mise à niveau.

En outre, l'intérêt croissant pour la vie privée numérique commence à s'aligner sur la performance récente du marché de Zcash. Un graphique partagé par Will McEvoy compare les données de Google Trends pour le terme « privacy » avec l'évolution du prix de ZEC sur une échelle logarithmique et montre les deux en hausse marquée jusqu'en 2026.

Graphique Zcash | Source : X

Les données indiquent que l'attention du public autour de la vie privée a atteint son niveau le plus élevé pendant la période du graphique, tandis que ZEC a également progressé vers la limite supérieure de sa fourchette récente. Ce mouvement parallèle ajoute une autre dimension au rallye de Zcash, les participants du marché reliant de plus en plus la force du token à une demande accrue pour des outils et actifs axés sur la vie privée.

La vulnérabilité a été découverte le vendredi 29 mai par le chercheur en sécurité indépendant Taylor Hornby lors d’un audit de protocole soutenu par Shielded Labs. Hornby a signalé le problème aux ingénieurs principaux de ZODL, qui ont confirmé la faille dans les heures qui ont suivi et ont commencé à préparer une correction.

Le bogue a affecté l'implémentation du circuit de preuve à divulgation nulle de connaissance Orchard dans le crate halo2_gadgets. En termes simples, un bogue de solidité peut permettre à un système d'accepter une transaction invalide ou un changement d'état. Dans ce cas, l'exploitation aurait pu permettre un double dépense au sein d'Orchard, bien que le mécanisme de tourniquet de Zcash ait protégé l'offre totale de ZEC.

Une coordination privée avec les mineurs et les plateformes d'échange a commencé dimanche, 31 mai. Après qu'une tentative d'activation précoce ait rencontré des problèmes de déploiement, les ingénieurs ont publié un autre correctif ciblant la hauteur de bloc 3 363 426. Ce fork doux a été activé vers 02:00 UTC le 2 juin.

Zebra 4.5.3 a temporairement rejeté les blocs et les transactions contenant des actions Orchard. Cette mesure a permis aux développeurs de terminer la correction complète du circuit tout en limitant les détails publics sur la vulnérabilité. Notamment, les transactions Sapling et transparentes ont continué à fonctionner pendant l'incident.

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Zebra 5.0.0 active NU6.2 à la hauteur de bloc Mainnet 3 364 600 et à la hauteur de bloc Testnet 4 052 000. La mise à jour ajoute également des règles de consensus qui rejettent les bundles Orchard ayant des tailles de preuve non canoniques à partir de la hauteur d'activation, fermant ainsi la vulnérabilité traitée par le soft fork précédent.

La Zcash Foundation a déclaré que la vulnérabilité avait été corrigée avant toute exploitation connue. Elle a également indiqué qu'aucune preuve de création non autorisée de valeur n'avait été trouvée, tandis que le mécanisme de tourniquet de Zcash a confirmé que l'offre totale est restée intacte tout au long de l'incident.

La vie privée des utilisateurs n'a pas été affectée pendant la réponse. La Fondation a également remercié Taylor Hornby, Shielded Labs, les ingénieurs de ZODL, les contributeurs de Zebra, les mineurs, les opérateurs de nœuds, les plateformes d'échange, les fournisseurs de wallets et les équipes d'infrastructure pour leur soutien à la mise à niveau coordonnée qui a rétabli les opérations Orchard.