An issue exists in fastecdsa prior to 2.1.2. When using the NIST P-256 curve in the ECDSA implementation, the point at infinity is mishandled. This means that for an extreme value in k and s^-1, the signature verification fails even if the signature is correct. This behavior is not solely a usability problem. There are some threat models where an attacker can benefit by successfully guessing users for whom signature verification will fail.
| Vulnerable Product | Search on Vulmon | Subscribe to Product |
|---|---|---|
fastecdsa project fastecdsa |
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