CVE-2020-36843
Apache EdDSA-Java Ed25519 Signature Malleability
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.
INFO
Published Date :
March 13, 2025, 6:15 a.m.
Last Modified :
March 13, 2025, 6:15 a.m.
Remotely Exploit :
No
Source :
[email protected]
Affected Products
The following products are affected by CVE-2020-36843
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | MEDIUM | [email protected] |
Solution
- Update EdDSA-Java library to a secure version.
- Verify the integrity of cryptographic operations.
- Re-sign existing data with the updated library.
Public PoC/Exploit Available at Github
CVE-2020-36843 has a 1 public
PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2020-36843.
| URL | Resource |
|---|---|
| https://eprint.iacr.org/2020/1244 | |
| https://github.com/str4d/ed25519-java/issues/82#issue-727629226 |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2020-36843 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2020-36843
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
ORAcle database CDC (Change Data Capture)
oracle-database oraclegoldengate cdc change-data-capture kafka kafka-connect amazon amazon-web-services aws aws-msk confluent-kafka confluent-platform oracle-rdbms oracle-wallet oracle-golden-gate oracle parser redo json vector
Shell Java Dockerfile
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2020-36843 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2020-36843 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
New CVE Received by [email protected]
Mar. 13, 2025
Action Type Old Value New Value Added 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. Added CVSS V3.1 AV:L/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N Added CWE CWE-347 Added Reference https://eprint.iacr.org/2020/1244 Added Reference https://github.com/str4d/ed25519-java/issues/82#issue-727629226