elliptic: Missing Validation in Elliptic's EDDSA Signature Verification

A flaw was found in the Elliptic package. This vulnerability allows attackers to bypass EDDSA signature validation via improper handling of signature values where the S component of the signature is not properly checked for being non-negative or smaller than the curve order...

GHSA-977X-G7H5-7QGW Elliptic's ECDSA missing check for whether leading bit of r and s is zero

In the Elliptic package 6.5.6 for Node.js, ECDSA signature malleability occurs because there is a missing check for whether the leading bit of r and s is zero...