mdanter/ecc affected by timing vulnerability in cryptographic side-channels

phpecc, as used in all versions of mdanter/ecc, as well as paragonie/ecc before 2.0.1, has a branch-based timing leak in Point addition. This Composer package is also known as phpecc/phpecc on GitHub, previously known as the Matyas Danter ECC library. Paragon Initiative Enterprises hard-forked...

Cryptographic side-channels in PHPECC

ECDSA Canonicalization PHPECC is vulnerable to malleable ECDSA signature attacks. Constant-Time Signer When generating a new ECDSA signature, the GMPMath adapter was used. This class wraps the GNU Multiple Precision arithmetic library GMP, which does not aim to provide constant-time implementatio...