Red Hat Certificate System (RHCS) 7.3 and 8 and Dogtag Certificate System do not require authentication for requests to decrypt SCEP one-time PINs, which allows remote attackers to obtain PINs by sniffing the network for SCEP requests and then sending decryption requests to the Certificate Authority component.

Red Hat Certificate System (RHCS) 7.3 and 8 and Dogtag Certificate System allow remote authenticated users to generate an arbitrary number of certificates by replaying a single SCEP one-time PIN.