CVE-2020-6356 in 3D Visual Enterprise Viewer
Summary
by MITRE
SAP 3D Visual Enterprise Viewer, version - 9, allows a user to open manipulated BMP file received from untrusted sources which results in crashing of the application and becoming temporarily unavailable until the user restarts the application, this is caused due to Improper Input Validation.
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Analysis
by VulDB Data Team • 09/09/2020
SAP 3D Visual Enterprise Viewer version 9 contains a critical vulnerability classified as CVE-2020-6356 that stems from inadequate input validation mechanisms when processing bitmap image files. This vulnerability specifically affects the application's handling of manipulated bmp files received from untrusted sources, creating a potential denial of service condition that can severely impact operational continuity. The flaw resides in the viewer's failure to properly validate and sanitize input data before processing, allowing maliciously crafted bitmap files to trigger unexpected application behavior. This improper input validation represents a direct violation of secure coding practices and falls under the CWE-20 category for improper input validation, which is a foundational weakness in software security architecture. The vulnerability operates at the file parsing level where the application lacks proper bounds checking and data sanitization routines that should validate file headers, dimensions, and pixel data structures before attempting to render or process the image content.
The operational impact of this vulnerability extends beyond simple application instability to encompass broader business continuity concerns within organizations that rely on SAP 3D Visual Enterprise Viewer for their visualization workflows. When a maliciously crafted bmp file is opened, the application experiences a crash that renders it temporarily unavailable until manual user intervention is performed to restart the application. This disruption can occur during critical business operations, potentially causing delays in product visualization, design reviews, or collaborative work sessions that depend on the viewer's functionality. The vulnerability is particularly concerning in enterprise environments where users may receive files from external sources or through automated workflows, creating multiple potential attack vectors for exploitation. Organizations utilizing this viewer may experience reduced productivity and increased support overhead as users encounter application crashes and require system restarts to restore functionality.
From a threat modeling perspective, this vulnerability aligns with ATT&CK technique T1203 for exploitation of known vulnerabilities and represents a classic example of how input validation flaws can lead to denial of service conditions. The attack surface is broad as it can be triggered through various means including email attachments, file sharing platforms, or automated download processes where users might inadvertently open compromised files. Security practitioners should note that this vulnerability demonstrates the importance of implementing defense-in-depth strategies that include input validation, file type verification, and sandboxing mechanisms to prevent single points of failure. The lack of proper input validation creates an environment where attackers can craft specific file structures that cause buffer overflows or memory corruption conditions, leading to application termination and service disruption. Organizations should consider implementing network segmentation, email filtering, and user education programs to reduce the risk of exploitation while awaiting official patches from SAP.
The remediation approach for this vulnerability should focus on immediate patching from SAP as the primary mitigation strategy, while organizations should also implement additional controls such as restricting file type permissions, deploying application whitelisting solutions, and establishing secure file handling protocols. Security teams should monitor for exploitation attempts through network traffic analysis and endpoint detection systems that can identify suspicious file access patterns. The vulnerability serves as a reminder of the critical importance of regular security assessments and vulnerability management processes to identify and remediate such flaws before they can be exploited in real-world scenarios. Organizations should also consider implementing automated file validation mechanisms and content inspection tools that can proactively scan incoming files for known malicious patterns or structures that could trigger similar vulnerabilities in other applications.