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.
References
Link | Resource |
---|---|
https://github.com/AntonKueltz/fastecdsa/commit/4a16daeaf139be20654ef58a9fe4c79dc030458c | Issue Tracking Patch Third Party Advisory |
https://github.com/AntonKueltz/fastecdsa/commit/7b64e3efaa806b4daaf73bb5172af3581812f8de | Patch Third Party Advisory |
https://github.com/AntonKueltz/fastecdsa/commit/e592f106edd5acf6dacedfab2ad16fe6c735c9d1 | Patch Third Party Advisory |
https://github.com/AntonKueltz/fastecdsa/issues/52 | Exploit Third Party Advisory |
https://github.com/AntonKueltz/fastecdsa/commit/4a16daeaf139be20654ef58a9fe4c79dc030458c | Issue Tracking Patch Third Party Advisory |
https://github.com/AntonKueltz/fastecdsa/commit/7b64e3efaa806b4daaf73bb5172af3581812f8de | Patch Third Party Advisory |
https://github.com/AntonKueltz/fastecdsa/commit/e592f106edd5acf6dacedfab2ad16fe6c735c9d1 | Patch Third Party Advisory |
https://github.com/AntonKueltz/fastecdsa/issues/52 | Exploit Third Party Advisory |
Configurations
History
12 Feb 2025, 18:29
Type | Values Removed | Values Added |
---|---|---|
First Time |
Antonkueltz fastecdsa
Antonkueltz |
|
CPE | cpe:2.3:a:antonkueltz:fastecdsa:*:*:*:*:*:*:*:* |
21 Nov 2024, 04:59
Type | Values Removed | Values Added |
---|---|---|
References | () https://github.com/AntonKueltz/fastecdsa/commit/4a16daeaf139be20654ef58a9fe4c79dc030458c - Issue Tracking, Patch, Third Party Advisory | |
References | () https://github.com/AntonKueltz/fastecdsa/commit/7b64e3efaa806b4daaf73bb5172af3581812f8de - Patch, Third Party Advisory | |
References | () https://github.com/AntonKueltz/fastecdsa/commit/e592f106edd5acf6dacedfab2ad16fe6c735c9d1 - Patch, Third Party Advisory | |
References | () https://github.com/AntonKueltz/fastecdsa/issues/52 - Exploit, Third Party Advisory |
Information
Published : 2020-06-02 21:15
Updated : 2025-02-12 18:29
NVD link : CVE-2020-12607
Mitre link : CVE-2020-12607
CVE.ORG link : CVE-2020-12607
JSON object : View
Products Affected
antonkueltz
- fastecdsa
CWE
CWE-347
Improper Verification of Cryptographic Signature