CVE-2020-36843
Ed25519 Signature Malleability in ed25519-java Due to Missing Scalar Range Check
4.3
MEDIUM
CVSS 3.1
EPSS 0.03%
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.
How to fix CVE-2020-36843
To remediate CVE-2020-36843, upgrade the affected package to a fixed version below.
- —upgrade to 0.3.0-2.1 or later
- —no fix listed
- —upgrade to 0.9.39 or later
Is CVE-2020-36843 being exploited?
Low — EPSS is 0.0%, meaning exploitation activity has not been observed at scale.
Affected packages (3)
- from 0, < 0.3.0-2.1
- from 0, <= 0.3.0
- from 0, < 0.9.39
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM4.3 | CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N |