GHSA-GJV3-89HH-9XQ2 RISC Zero Ethereum invalid commitment with digest value of zero accepted by Steel.validateCommitment

Impact Prior to 2.1.1 and 2.2.0, the Steel.validateCommitment Solidity library function will return true for a crafted commitment with a digest value of zero. This violates the semantics of validateCommitment, as this does not commitment to a block that is in the current chain. Because the digest...