CVE-2021-27643 in 3D Visual Enterprise Viewer
Summary
by MITRE • 06/09/2021
SAP 3D Visual Enterprise Viewer, version - 9, allows a user to open manipulated IFF 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 • 06/12/2021
SAP 3D Visual Enterprise Viewer version 9 contains a critical vulnerability classified as CVE-2021-27643 that stems from inadequate input validation mechanisms when processing IFF file formats. This vulnerability represents a classic example of improper input validation as defined by CWE-20, where the application fails to properly sanitize or validate input data before processing. The flaw specifically manifests when the viewer encounters manipulated IFF files from untrusted sources, creating a condition where the application becomes unstable and crashes completely. The vulnerability is particularly concerning because it directly impacts the availability and reliability of the viewer application, forcing users to manually restart the software to restore functionality.
The technical exploitation of this vulnerability occurs through the manipulation of IFF (Interchange File Format) files, which are commonly used for storing 3D visual data and multimedia content. When the SAP 3D Visual Enterprise Viewer attempts to parse and render these malformed files, the improper validation allows maliciously crafted data structures to trigger unexpected behavior within the application's memory management and file parsing routines. This type of vulnerability falls under the ATT&CK technique T1203, where adversaries leverage application vulnerabilities to cause denial of service conditions. The crash behavior indicates that the application lacks proper exception handling and input sanitization, leading to abrupt termination rather than graceful error recovery mechanisms that would allow users to continue working.
From an operational standpoint, this vulnerability creates significant disruption in enterprise environments where SAP 3D Visual Enterprise Viewer is deployed for product visualization, design review, and collaborative engineering processes. The temporary unavailability of the application forces users to interrupt their workflow and manually restart the viewer, potentially resulting in lost productivity and data loss. The impact extends beyond simple inconvenience as it can affect critical design and manufacturing processes where 3D visualization tools are integral to decision-making workflows. Organizations using this viewer in production environments face the risk of operational downtime during critical project phases, particularly when multiple users might simultaneously attempt to open compromised files.
The remediation approach for this vulnerability should focus on implementing comprehensive input validation measures that properly sanitize all incoming IFF file data before processing. Organizations should deploy immediate patches or updates from SAP that address the specific validation flaw in the viewer's file parsing logic. Additionally, implementing network-level controls such as file content inspection and blocking of suspicious IFF file types can provide additional defense in depth. Security teams should also consider implementing application whitelisting policies that restrict users from opening IFF files from untrusted sources, while monitoring for unusual file access patterns that might indicate exploitation attempts. The vulnerability highlights the importance of secure coding practices and proper input validation as fundamental security controls that should be integrated throughout the software development lifecycle to prevent similar issues in future releases.