CVE-2020-36843

MEDIUM EPSS 3.2%

Published Mar 13, 20251y ago · Modified Jun 17, 20261w ago

4.3 CVSS 3.1

Medium

Published Mar 13, 2025 1y ago

Last Modified Jun 17, 2026 1w ago

Description

The implementation of EdDSA in EdDSA-Java (aka ed25519-java) through 0.3.0 exhibits signature malleability and does not satisfy the SUF-CMA (Strong Existential Unforgeability under Chosen Message Attacks) property. This allows attackers to create new valid signatures different from previous signatures for a known message.

CVSS Details

Base Score

4.3

Exploitability

2.5

Impact

1.4

Vector string

CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N

Attack Vector Local

Attack Complexity Low

Privileges Required None

User Interaction None

Scope Changed

Confidentiality None

Integrity Low

Availability None

Threat Intelligence

EPSS Exploit Probability

3.2% percentile

Exploit & Patch Status

No Known Exploit

No Patch Available

Weaknesses 1

CWE-347

References 2

eprint.iacr.org https://eprint.iacr.org/2020/1244
github.com https://github.com/str4d/ed25519-java/issues/82#issue-727629226

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.