str4d ed25519-java up to 0.3.0 EdDSA signature verification

HistoryDiffrelatejsonxmlCTI

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
3.4	$0-$5k	0.00

Summaryinfo

A vulnerability has been found in str4d ed25519-java up to 0.3.0 and classified as problematic. Affected is an unknown function of the component EdDSA. This manipulation causes signature verification. This vulnerability is tracked as CVE-2020-36843. The attack is restricted to local execution. No exploit exists.

Detailsinfo

A vulnerability was found in str4d ed25519-java up to 0.3.0. It has been declared as problematic. Affected by this vulnerability is an unknown part of the component EdDSA. The manipulation with an unknown input leads to a signature verification vulnerability. The CWE definition for the vulnerability is CWE-347. The product does not verify, or incorrectly verifies, the cryptographic signature for data. As an impact it is known to affect integrity. The summary by CVE is:

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.

The advisory is shared at github.com. This vulnerability is known as CVE-2020-36843 since 03/13/2025. The exploitation appears to be difficult. An attack has to be approached locally. Neither technical details nor an exploit are publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 232871 (Jenkins plugins Multiple Vulnerabilities (2025-03-19)), which helps to determine the existence of the flaw in a target environment.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the databases at Tenable (232871) and CERT Bund (WID-SEC-2025-2163). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Affected

IBM QRadar SIEM
IBM App Connect Enterprise

Productinfo

Type

Programming Language Software

Vendor

str4d

Name

ed25519-java

Version

Website

Product: https://github.com/str4d/ed25519-java/

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 3.4
VulDB Meta Temp Score: 3.4

VulDB Base Score: 2.5
VulDB Temp Score: 2.5
VulDB Vector: 🔍
VulDB Reliability: 🔍

CNA Base Score: 4.3
CNA Vector (MITRE): 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Signature verification
CWE: CWE-347 / CWE-345
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Nessus ID: 232871
Nessus Name: Jenkins plugins Multiple Vulnerabilities (2025-03-19)

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

03/13/2025 🔍
03/13/2025 +0 days 🔍
03/13/2025 +0 days 🔍
11/01/2025 +233 days 🔍

Sourcesinfo

Product: github.com

Advisory: 82
Status: Confirmed

CVE: CVE-2020-36843 (🔍)
GCVE (CVE): GCVE-0-2020-36843
GCVE (VulDB): GCVE-100-299617
CERT Bund: WID-SEC-2025-2163 - IBM App Connect Enterprise: Mehrere Schwachstellen

Entryinfo

Created: 03/13/2025 07:54
Updated: 11/01/2025 09:10
Changes: 03/13/2025 07:54 (63), 03/13/2025 13:18 (1), 03/20/2025 00:36 (2), 10/01/2025 11:25 (7), 11/01/2025 09:10 (1)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.