A flaw was found in Nettle in versions before 3.7.2, where several Nettle signature verification functions (GOST DSA, EDDSA & ECDSA) result in the Elliptic Curve Cryptography point (ECC) multiply function being called with out-of-range scalers, possibly resulting in incorrect results. This flaw allows an attacker to force an invalid signature, causing an assertion failure or possible validation. The highest threat to this vulnerability is to confidentiality, integrity, as well as system availability.
History

No history.

cve-icon MITRE Information

Status: PUBLISHED

Assigner: redhat

Published: 2021-04-05T21:31:06

Updated: 2021-10-22T17:07:06

Reserved: 2020-12-17T00:00:00


Link: CVE-2021-20305

JSON object: View

cve-icon NVD Information

Status : Modified

Published: 2021-04-05T22:15:12.727

Modified: 2023-11-07T03:29:05.253


Link: CVE-2021-20305

JSON object: View

cve-icon Redhat Information

No data.