Rekindling concerns about the system millions of websites use to encrypt and authenticate sensitive data, Google caught a French governmental agency spoofing digital certificates for several Google domains.
The secure sockets layer (SSL) credentials were digitally signed by a valid certificate authority, an imprimatur that caused most mainstream browsers to place an HTTPS in front of the addresses and display other logos certifying that the connection was the one authorized by Google. In fact, the certificates were unauthorized duplicates that were issued in violation of rules established by browser manufacturers and certificate authority services.
The certificates were issued by an intermediate certificate authority linked to the Agence nationale de la sécurité des systèmes d’information, the French cyberdefense agency better known as ANSSI.
After Google brought the certificates to the attention of agency officials, the officials said the intermediate certificate was used in a commercial device on a private network to inspect encrypted traffic with the knowledge of end users, Google security engineer Adam Langley wrote in a blog post published over the weekend. Google updated its Chrome browser to reject all certificates signed by the intermediate authority and asked other browser makers to do the same. Firefox developer Mozilla and Microsoft, developer of Internet Explorer have followed suit.
ANSSI later blamed the mistake on human error. It said it had no security consequences for the French administration or the general public, but the agency has revoked the certificate anyway.