CVE-2024-34683 in Document Builder
Summary
by MITRE • 06/11/2024
An authenticated attacker can upload malicious file to SAP Document Builder service. When the victim accesses this file, the attacker is allowed to access, modify, or make the related information unavailable in the victim’s browser.
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Analysis
by VulDB Data Team • 08/09/2024
The vulnerability identified as CVE-2024-34683 represents a critical security flaw within SAP Document Builder service that enables authenticated attackers to upload malicious files, creating a persistent threat vector for victim systems. This vulnerability operates within the context of SAP's document management infrastructure, where legitimate users with appropriate credentials can inadvertently expose their systems to malicious file execution. The attack leverages the service's file upload functionality without adequate validation mechanisms, allowing adversaries to bypass normal security controls through legitimate user access.
The technical implementation of this vulnerability stems from insufficient input validation and sanitization within the SAP Document Builder service's file handling processes. When an authenticated user uploads a file through the service, the system fails to properly validate the file type, content, or execution context of the uploaded material. This weakness creates an opportunity for attackers to craft malicious files that appear legitimate but contain embedded malicious code or scripts designed to exploit browser vulnerabilities when accessed by victims. The flaw aligns with CWE-434, which specifically addresses the insecure upload of code or files, and represents a direct violation of secure coding practices for file handling and content validation.
The operational impact of this vulnerability extends beyond simple unauthorized file access, as it enables a range of malicious activities including cross-site scripting attacks, session hijacking, and potential data exfiltration. When victims access the maliciously uploaded files through their browsers, the attacker gains the ability to execute arbitrary code in the victim's browser context, potentially leading to complete system compromise. This threat model aligns with ATT&CK technique T1059.007 for command and scripting interpreter and T1566 for credential harvesting, as the malicious files can be designed to capture user credentials or establish persistent access. The vulnerability creates a significant risk for enterprise environments where SAP Document Builder is widely used for document creation and management.
Mitigation strategies for CVE-2024-34683 require immediate implementation of multiple security controls including enhanced file validation mechanisms, strict content type checking, and comprehensive file upload restrictions. Organizations should implement mandatory file extension filtering, content-based file analysis, and sandboxing techniques for all uploaded documents. The SAP Document Builder service configuration must be updated to enforce stricter access controls and implement proper file integrity checks before allowing any file to be processed or made accessible to other users. Additionally, network-level protections including web application firewalls and intrusion detection systems should be deployed to monitor for suspicious file upload activities and prevent exploitation attempts. Security teams should also consider implementing user behavior analytics to detect anomalous file access patterns that may indicate exploitation of this vulnerability. Regular security assessments and penetration testing should be conducted to validate the effectiveness of implemented controls and ensure continued protection against this and similar threats.