CVE-2006-2940
Publiée le 2006-09-28 · Dernière modification le 2026-06-16
Les anciennes versions d'OpenSSL sont vulnérables à une attaque par déni de service dans laquelle un attaquant distant et non authentifié envoie un certificat X.509 spécialement conçu. En utilisant des clés publiques surdimensionnées, l'attaquant force le serveur à consommer des ressources CPU excessives pour la vérification de la signature, ce qui peut potentiellement paralyser le système. Cette attaque est facile à exécuter via le réseau et ne nécessite aucune interaction de l'utilisateur ni d'accès préalable.
DÉTAIL DU VECTEUR CVSS
RÉFÉRENCES
- secalert@redhat.com
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Description officielle du NVD (en anglais)
OpenSSL 0.9.7 before 0.9.7l, 0.9.8 before 0.9.8d, and earlier versions allows attackers to cause a denial of service (CPU consumption) via parasitic public keys with large (1) "public exponent" or (2) "public modulus" values in X.509 certificates that require extra time to process when using RSA signature verification.