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

Status: PUBLISHED

Assigner: redhat

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

Updated: 2024-08-03T17:37:23.808Z

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

Link: CVE-2021-20305

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Modified

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

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

Link: CVE-2021-20305

cve-icon Redhat

Severity : Important

Publid Date: 2021-03-16T00:00:00Z

Links: CVE-2021-20305 - Bugzilla