Exploiting Microsoft Dataverse: Deep Dive into CVE-2025-29807 Deserialization Flaw
Introduction
Microsoft Dataverse, a cornerstone of the Power Platform ecosystem, faces a critical security threat from CVE-2025-29807—a deserialization vulnerability capable of enabling remote code execution. This flaw underscores the persistent risks associated with legacy serialization methods, potentially allowing attackers to compromise sensitive enterprise data and execute arbitrary commands remotely.
Technical Deep Dive
CVE-2025-29807 stems from insecure deserialization (CWE-502) of untrusted data within Dataverse's data handling processes. Specifically, attackers with authorized access can exploit this vulnerability by injecting maliciously crafted serialized objects. These objects, when deserialized without proper validation, trigger arbitrary code execution (CWE-94).
Exploitation Method
Attackers exploit this vulnerability by:
- Crafting malicious serialized payloads designed to bypass Dataverse's input validation.
- Injecting these payloads into Dataverse API endpoints that accept serialized data.
- Triggering deserialization processes, leading to execution of attacker-controlled code.
The root cause lies in Dataverse's reliance on insecure serialization libraries, potentially including deprecated methods such as BinaryFormatter, known for their susceptibility to exploitation.
Patch Information
Microsoft has released security updates addressing this vulnerability. Organizations should immediately consult Microsoft's advisory here for specific patch details and apply updates promptly.
Detection Methods
To detect potential exploitation attempts:
- Monitor Dataverse application logs for unusual deserialization activity.
- Implement network monitoring to detect anomalous serialized object transmissions.
- Utilize endpoint detection and response (EDR) solutions to identify suspicious process executions related to Dataverse.
References
Given the critical nature of deserialization vulnerabilities, proactive patching and vigilant monitoring are essential to safeguarding enterprise environments from potential exploitation.
