CVE-2020-6331 in 3D Visual Enterprise Viewer
Summary
by MITRE
SAP 3D Visual Enterprise Viewer, version - 9, allows a user to open manipulated HPGL 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-2020-6331 that stems from improper input validation mechanisms when processing HPGL (Hewlett-Packard Graphics Language) files. This vulnerability represents a classic example of insufficient data sanitization where the application fails to adequately validate or sanitize input parameters before processing them, creating an avenue for malicious actors to disrupt system operations through crafted file manipulation. The flaw specifically manifests when the viewer encounters manipulated HPGL files from untrusted sources, demonstrating a fundamental weakness in the application's input handling architecture that directly violates established security principles.
The technical implementation of this vulnerability occurs at the file parsing layer where the viewer does not perform adequate boundary checking or input validation on HPGL commands and parameters. When a maliciously crafted HPGL file is processed, the application's parsing logic encounters unexpected data sequences that cause memory corruption or resource exhaustion, ultimately leading to application termination and system unavailability. This behavior aligns with CWE-20: Improper Input Validation, which categorizes weaknesses related to insufficient validation of input data that can result in various security impacts including denial of service and potential code execution. The vulnerability operates at the application layer and represents a privilege escalation issue since it can be exploited by any user who can submit files to the system, requiring no elevated privileges for exploitation.
The operational impact of CVE-2020-6331 extends beyond simple application disruption to encompass broader business continuity concerns within organizations that rely on SAP 3D Visual Enterprise Viewer for critical visualization tasks. When the application crashes, users experience immediate productivity loss and potential data access interruption, while system administrators must perform manual restart procedures that can disrupt ongoing workflows. The temporary unavailability of the application creates a window of vulnerability where users may be forced to seek alternative, potentially less secure methods for accessing visualization data. From an attack perspective, this vulnerability aligns with ATT&CK technique T1499.004: Endpoint Denial of Service, where adversaries target application availability through manipulation of input data to cause system instability and disruption of legitimate use.
Organizations should implement immediate mitigations including restricting file upload capabilities and implementing strict input validation controls to prevent processing of untrusted HPGL files. Network-level controls such as file type filtering and sandboxing mechanisms should be deployed to isolate potentially malicious files from the main application environment. Regular security updates and patches from SAP should be prioritized to address the root cause of this vulnerability. Additionally, user education programs should emphasize the importance of only processing files from trusted sources and implementing proper file validation procedures before opening any visualization content. The vulnerability serves as a reminder of the critical importance of input validation in preventing denial of service attacks and maintaining system availability in enterprise environments.