CVE-2025-43713: Critical Vulnerability in ASNA Products Exposes Systems to Remote Code Execution
A critical security vulnerability, identified as CVE-2025-43713, has been discovered in ASNA Assist and ASNA Registrar. This flaw allows attackers to exploit .NET remoting deserialization issues, potentially leading to remote code execution and complete system compromise.
🔍 TL;DR Summary
ASNA Assist and ASNA Registrar services are vulnerable to .NET deserialization attacks. Successful exploitation could give attackers SYSTEM-level privileges, allowing them to execute arbitrary code on the affected machine. Update your ASNA products immediately!
🚨 Vulnerability Details
- CVE ID: CVE-2025-43713
- Description: ASNA Assist and ASNA Registrar before 2025-03-31 allow deserialization attacks against .NET remoting. These services support license key management and deprecated Windows network authentication. The services are implemented with .NET remoting and can be exploited via well-known deserialization techniques inherent in the technology. Because the services run with SYSTEM-level rights, exploits can be crafted to achieve escalation of privilege and arbitrary code execution.
- CVSS Score and Vector: CVSS 3.1 score of 6.5 (Medium), with a vector of CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
- CVSS Explanation: This CVSS score indicates that the vulnerability is remotely exploitable with low attack complexity and doesn't require any user interaction. While the impact on confidentiality and integrity is limited to Low, the potential for privilege escalation to SYSTEM makes it a significant risk.
- Exploit Requirements: An attacker needs network access to the affected system. No authentication is required, making it easier to exploit.
- Affected Vendor, Product, Version:
- Vendor: ASNA
- Products:
- ASNA Assist
- ASNA Registrar
- DataGate for SQL Server 17.0.36.0 and 16.0.89.0
- DataGate Component Suite 17.0.36.0 and 16.0.89.0
- DataGate Monitor 17.0.26.0 and 16.0.65.0
- DataGate WebPak 17.0.37.0 and 16.0.90.0
- Monarch for .NET 11.4.50.0 and 10.0.62.0
- Encore RPG 4.1.36.0
- Visual RPG .NET FW 17.0.37.0 and 16.0.90.0
- Visual RPG .NET FW Windows Deployment 17.0.36.0 and 16.0.89.0
- WingsRPG 11.0.38.0 and 10.0.95.0
- Mobile RPG 11.0.35.0 and 10.0.94.0
- Monarch Framework for .NET FW 11.0.36.0 and 10.0.89.0
- Browser Terminal 17.0.37.0 and 16.0.90.0
- Visual RPG Classic 5.2.7.0 and 5.1.17.0
- Visual RPG Deployment 5.2.7.0 and 5.1.17.0
- DataGate Studio 17.0.38.0 and 16.0.104.0
- Version: Versions prior to 2025-03-31
- CWE: CWE-502 - Deserialization of Untrusted Data
- CWE Explanation: CWE-502 occurs when an application deserializes (or reconstructs) data from an untrusted source without proper validation. This can allow an attacker to inject malicious code that is executed during the deserialization process, leading to remote code execution.
📅 Timeline of Events
- 2025-07-03: CVE-2025-43713 Published
🧠 Exploitability & Real-World Risk
The vulnerability lies in the .NET remoting services used by ASNA products. .NET Remoting's inherent deserialization issues are well-documented and relatively easy to exploit. The fact that the affected services run with SYSTEM privileges makes this a high-risk vulnerability. Successful exploitation grants an attacker complete control over the compromised system. In a real-world scenario, this could be leveraged for lateral movement within a network, data exfiltration, or deploying ransomware.
🛠️ Recommendations
- Immediate Patching: Apply the latest security updates provided by ASNA as soon as possible.
- Network Segmentation: Implement network segmentation to limit the potential impact of a successful exploit.
- Principle of Least Privilege: Review the privileges assigned to the affected services and consider running them with reduced privileges if possible. However, be aware of compatibility issues.
- Disable .NET Remoting (if possible): If .NET Remoting is not essential, consider disabling it altogether to mitigate the risk.
- Monitor for Suspicious Activity: Monitor systems running ASNA products for any signs of compromise, such as unexpected process execution or network connections.
🧪 Technical Insight
.NET Remoting allows applications to communicate across different application domains, processes, or even machines. It uses deserialization to convert data transmitted over the network back into objects. If the deserialization process is not carefully controlled, an attacker can craft a malicious payload that, when deserialized, executes arbitrary code. In this specific case, the ASNA services are vulnerable because they don't properly validate the data being deserialized from the .NET Remoting channel.
🙌 Credit to Researcher(s)
The vulnerability was discovered by [Add researcher name if available].
🔗 References
🧵 Tags
CVE-2025-43713, ASNA, .NET Remoting, Deserialization, RCE, Remote Code Execution, Privilege Escalation, Windows
Summary: A critical vulnerability (CVE-2025-43713) exists in ASNA Assist and Registrar, allowing remote attackers to execute code with SYSTEM privileges via .NET deserialization attacks. Affected products include DataGate, Monarch, Visual RPG and others. Immediate patching is strongly advised.
CVE ID: CVE-2025-43713
Risk Analysis: Successful exploitation grants the attacker SYSTEM privileges, allowing them to execute arbitrary code, install malware, steal data, or disrupt services.
Recommendation: Apply the latest security updates from ASNA immediately to mitigate this vulnerability. Consider disabling .NET Remoting if it is not essential.
Timeline
- 2025-07-03: CVE-2025-43713 Published