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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Affected Vendors & Products
References
History
No history.
MITRE
Status: PUBLISHED
Assigner: mitre
Published: 2020-06-02T21:00:52
Updated: 2024-08-04T12:04:21.646Z
Reserved: 2020-05-01T00:00:00
Link: CVE-2020-12607
Vulnrichment
No data.
NVD
Status : Modified
Published: 2020-06-02T21:15:10.607
Modified: 2024-11-21T04:59:54.750
Link: CVE-2020-12607
Redhat
No data.