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.
Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

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:fastecdsa_project:fastecdsa:*:*:*:*:*:*:*:* cpe:2.3:a:antonkueltz:fastecdsa:*:*:*:*:*:*:*:*
Vendors & Products Fastecdsa Project
Fastecdsa Project fastecdsa
Antonkueltz
Antonkueltz fastecdsa

cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

Updated: 2024-08-04T12:04:21.646Z

Reserved: 2020-05-01T00:00:00

Link: CVE-2020-12607

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Modified

Published: 2020-06-02T21:15:10.607

Modified: 2025-02-12T18:29:08.047

Link: CVE-2020-12607

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.