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.

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Advisories
Source ID Title
EUVD EUVD EUVD-2020-0078 Improper Verification of Cryptographic Signature in fastecdsa
Github GHSA 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.

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

Projects

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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.

Weaknesses