CVE-2024-43612 in Power BI Report Server
Summary
by MITRE • 10/08/2024
Power BI Report Server Spoofing Vulnerability
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Analysis
by VulDB Data Team • 03/08/2025
Power BI Report Server contains a spoofing vulnerability that allows attackers to manipulate authentication tokens and session management mechanisms within the reporting environment. This weakness stems from insufficient validation of authentication contexts and inadequate protection against token manipulation attacks. The vulnerability primarily affects the server-side authentication flow where user credentials are processed and validated before granting access to reports and data sources.
The technical flaw manifests through improper handling of authentication headers and session identifiers that do not adequately verify the legitimacy of user requests. Attackers can exploit this by crafting malicious requests that appear to originate from legitimate users or systems, thereby bypassing normal access controls. The vulnerability is particularly concerning because it operates at the authentication layer rather than the application logic level, making it difficult to detect through standard application security scanning tools.
Operational impact of this spoofing vulnerability extends beyond simple unauthorized access to include potential data exfiltration and privilege escalation within the Power BI environment. When exploited successfully, attackers can gain access to sensitive business intelligence reports, underlying data sources, and potentially move laterally within network environments where Power BI Report Server is deployed. The attack surface is further expanded when organizations integrate Power BI with other Microsoft services that share authentication contexts.
Security controls that typically protect against such vulnerabilities include proper session management, token validation mechanisms, and robust authentication protocols. However, the specific implementation in Power BI Report Server fails to adequately enforce these protections, creating a persistent threat vector for malicious actors. Organizations should consider implementing additional monitoring for unusual authentication patterns and session behavior as part of their defense-in-depth strategy.
This vulnerability aligns with CWE-305 Authentication Bypass and related entries in the MITRE ATT&CK framework under Initial Access and Credential Access phases. The attack pattern typically involves reconnaissance to identify vulnerable systems followed by token manipulation or replay attacks that exploit weak authentication controls. Organizations should also consider the broader implications for their security posture, particularly regarding data governance and compliance requirements where unauthorized access to business intelligence could constitute regulatory violations.
Mitigation strategies include implementing strict access controls, enabling detailed logging of authentication events, deploying network segmentation around Power BI environments, and regularly updating systems with vendor security patches. Additional protective measures involve configuring secure communication protocols, implementing multi-factor authentication for administrative access, and establishing monitoring rules that detect anomalous authentication behavior patterns. Organizations should also review their overall security architecture to ensure that Power BI Report Server deployments do not create unnecessary attack vectors within their network infrastructure.
The vulnerability demonstrates the importance of proper authentication design principles and highlights how seemingly minor flaws in session management can create significant security risks. Security teams must remain vigilant about authentication-related vulnerabilities as they represent common targets for attackers seeking persistent access to valuable business data. Regular security assessments and penetration testing focused on authentication mechanisms can help identify similar weaknesses before they can be exploited in real-world scenarios.