An issue was discovered in fastecdsa before 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.
Tracking
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Advisories
| Source | ID | Title |
|---|---|---|
EUVD |
EUVD-2020-0078 | Improper Verification of Cryptographic Signature in fastecdsa |
Github GHSA |
GHSA-56wv-2wr9-3h9r | Improper Verification of Cryptographic Signature in fastecdsa |
Fixes
Solution
No solution given by the vendor.
Workaround
No workaround given by the vendor.
References
History
Wed, 12 Feb 2025 18:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Antonkueltz
Antonkueltz fastecdsa |
|
| CPEs | cpe:2.3:a:antonkueltz:fastecdsa:*:*:*:*:*:*:*:* | |
| Vendors & Products |
Fastecdsa Project
Fastecdsa Project fastecdsa |
Antonkueltz
Antonkueltz fastecdsa |
Status: PUBLISHED
Assigner: mitre
Published:
Updated: 2024-08-04T12:04:21.646Z
Reserved: 2020-05-01T00:00:00.000Z
Link: CVE-2020-12607
No data.
Status : Modified
Published: 2020-06-02T21:15:10.607
Modified: 2025-02-12T18:29:08.047
Link: CVE-2020-12607
No data.
OpenCVE Enrichment
No data.
Weaknesses
EUVD
Github GHSA