CVE-2021-38195: Overflow in libsecp256k1

August 25, 2021

An issue was discovered in the libsecp256k1 crate before 0.5.0 for Rust. It can verify an invalid signature because it allows the R or S parameter to be larger than the curve order, aka an overflow.

References

github.com/advisories/GHSA-g4vj-x7v9-h82m
github.com/paritytech/libsecp256k1
github.com/paritytech/libsecp256k1/pull/67
nvd.nist.gov/vuln/detail/CVE-2021-38195
rustsec.org/advisories/RUSTSEC-2021-0076.html

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