GitHub Advisoryadvisory · Maven

GHSA-p53j-g8pw-4w5f Ed25519 Signature Malleability in ed25519-java Due to Missing Scalar Range Check

MEDIUM Published 2025-03-13 Modified 2025-03-13 Official page ↗
Aliases
CVE-2020-36843
Ecosystem
Maven
Packages
net.i2p.crypto:eddsa, net.i2p:i2p
Severity
Moderate
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N
Weaknesses
CWE-347
Reviewed
2025-03-13

Affected packages

• Maven net.i2p.crypto:eddsa: <= 0.3.0 (no fix yet) • Maven net.i2p:i2p: < 0.9.39 → fixed in 0.9.39

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.

Related

Alias · CVE (1)

  • CVE-2020-36843 The implementation of EdDSA in EdDSA-Java (aka ed25519-java) through 0.3.0 exhibits signature malleability and does not satisfy the SUF-CMA… vulnerability

Weakness · CWE (1)

  • CWE-347 Improper Verification of Cryptographic Signature weakness

References