Denial Of Service (DoS)

crypto/elliptic in github.com/golang/go is vulnerable to denial of service (DoS). The attack exists because it introduces a long busy loop in subtraction term for the implementation of P-521 and P-384 elliptic curve cryptography algorithms which allows malicious input through TLS handshakes, X.509 certificates, JWT tokens, ECDH shares or ECDSA signatures, causing extreme CPU consumption. Moreover, a reuse of an ECDH private key more than once also results in a key recovery.