CVE-2021-38195

The CVE-2021-38195 issue affects the libsecp256k1 crate for Rust, specifically versions before 0.5.0. The root cause is an overflow where the R or S parameter can be larger than the curve order, allowing an invalid signature to be verified. This vulnerability is described in multiple connected re...

CVE-2019-20399

The CVE-2019-20399 entry concerns a timing vulnerability in Scalar::check_overflow within Parity libsecp256k1-rs (pre-0.3.1). Multiple connected sources (Red Hat, GHSA, OSV, NVD, OSV, Alpine, etc.) describe that this can allow an attacker to leak information via a side-channel attack. The documen...

CVE-2019-25003

CVE-2019-25003 affects the Rust libsecp256k1 crate prior to 0.3.1, where Scalar::check_overflow did not execute in constant time. This timing side-channel can allow an attacker to potentially obtain sensitive information. The issue is fixed in 0.3.1 by making Scalar::check_overflow constant time;...