CVE-2020-6372 in 3D Visual Enterprise Viewer
Summary
by MITRE • 10/15/2020
SAP 3D Visual Enterprise Viewer, version - 9, allows a user to open manipulated PDF 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 • 11/20/2020
SAP 3D Visual Enterprise Viewer version 9 presents a critical security vulnerability classified as CVE-2020-6372, which stems from inadequate input validation mechanisms when processing PDF files. This flaw exists within the application's file parsing functionality where it fails to properly validate the structure and content of incoming PDF documents before attempting to render them. The vulnerability specifically affects users who receive PDF files from untrusted sources, creating a significant attack surface that can be exploited through social engineering or compromised communication channels. The improper input validation creates a condition where malformed or maliciously crafted PDF content can trigger unexpected application behavior, leading to complete application termination and system unavailability until manual user intervention is performed.
The technical implementation of this vulnerability resides in the PDF processing module of the SAP 3D Visual Enterprise Viewer, where the application lacks robust sanitization and validation checks for PDF file headers, object structures, and embedded content. When a user attempts to open a manipulated PDF file, the viewer's parsing routine encounters unexpected data patterns that cause memory corruption or stack overflow conditions within the application's execution environment. This type of vulnerability aligns with CWE-20, which describes improper input validation as a fundamental weakness that allows attackers to inject malicious data that disrupts normal application operation. The flaw demonstrates characteristics of a denial of service condition where the application's stability is compromised through controlled input manipulation rather than direct exploitation of privilege escalation or data breach mechanisms.
From an operational perspective, this vulnerability poses significant risks to enterprise environments that rely on SAP 3D Visual Enterprise Viewer for product visualization, design reviews, and collaborative engineering processes. The temporary application unavailability creates direct business disruption, as users cannot access critical 3D visualization capabilities until system restarts occur, potentially affecting multiple stakeholders in design and manufacturing workflows. The attack vector is particularly concerning because it requires minimal technical sophistication from threat actors, as simply opening a malicious PDF file can trigger the vulnerability without requiring additional authentication or privileged access. This makes the vulnerability highly exploitable in targeted attacks where adversaries can send crafted PDF files through email or other communication channels to specific users within an organization.
The impact extends beyond immediate service disruption to encompass potential secondary effects on organizational productivity and security posture. When users encounter application crashes, they may inadvertently download or open additional malicious content, increasing the risk of further compromise. Organizations using this software should consider implementing network-level controls to block suspicious PDF file transfers and establish user awareness programs to prevent accidental opening of untrusted documents. Mitigation strategies should include immediate deployment of SAP security patches, implementation of file validation policies, and network segmentation to limit the potential impact of successful exploitation attempts. The vulnerability also highlights the importance of input sanitization practices and adherence to secure coding guidelines, particularly in applications that process untrusted data from external sources, aligning with ATT&CK technique T1203 which covers exploitation for privilege escalation through application vulnerabilities.