A major operational error has resulted in the issuance of at least one million browser-trusted digital certificates from GoDaddy, Apple and Google that don’t comply with binding industry mandates.

The misconfiguration is the result of open source EJBCA software package that many browser-trusted authorities use to generate certificates that secure websites, encrypt email, and digitally sign code, independent security researcher Adam Caudill said in a blog post.

“It turns out that the serial number was effectively 63 bits, which is a violation of the CA/B Forum Baseline Requirements that state it must contain 64 bits of output from a secure random number generator (CSPRNG),” Caudill said. “As a result of this finding, 2,000,000 certificates or more may need to be replaced by Google, Apple, GoDaddy and various others.”

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