CVE-2021-27595 in 3D Visual Enterprise Viewer
Summary
by MITRE • 03/22/2021
When a user opens manipulated Portable Document Format (.PDF) files received from untrusted sources in SAP 3D Visual Enterprise Viewer, the application crashes and becomes temporarily unavailable to the user until restart of the application.
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Analysis
by VulDB Data Team • 04/03/2021
The vulnerability identified as CVE-2021-27595 represents a critical denial of service condition within SAP 3D Visual Enterprise Viewer, a specialized application designed for viewing and interacting with three-dimensional product data. This flaw manifests when users open maliciously crafted portable document format files from untrusted sources, creating a scenario where the application experiences a complete crash and subsequent temporary unavailability. The technical nature of this vulnerability places it squarely within the realm of software stability and application resilience, affecting the core operational functionality of the viewer application. The issue specifically targets the PDF parsing mechanism within the SAP 3D Visual Enterprise Viewer, where improper handling of malformed or specially constructed PDF content leads to application termination.
From a cybersecurity perspective, this vulnerability presents significant operational risks to organizations that rely heavily on 3D product visualization and collaboration tools. The crash condition effectively renders the application unusable for the duration of the incident, requiring manual restart procedures that can disrupt workflow processes and productivity. The vulnerability's exploitation requires minimal user interaction beyond opening the malicious file, making it particularly dangerous in environments where users may encounter phishing emails or other attack vectors delivering compromised PDF documents. The impact extends beyond simple application disruption to potentially affect business continuity, especially in manufacturing and engineering environments where 3D visualization tools are integral to product development processes. This flaw aligns with CWE-119, which addresses improper access to memory locations, and represents a classic example of a buffer overflow or memory corruption vulnerability that can lead to application instability.
The operational impact of CVE-2021-27595 cannot be understated in enterprise environments where SAP 3D Visual Enterprise Viewer serves as a critical component of product lifecycle management systems. When users encounter this vulnerability, they experience immediate service disruption that can cascade into broader productivity losses across engineering and design teams. The temporary unavailability of the application creates a window of vulnerability where users may resort to alternative, potentially less secure methods of accessing 3D product data. Organizations must consider the broader implications of this denial of service condition, particularly when evaluating their incident response capabilities and business continuity planning. The vulnerability also introduces potential attack surface expansion when considering that PDF files are commonly used in business communications, making this a vector that can be exploited through social engineering campaigns or compromised email systems. From an attacker's perspective, this represents a low-effort, high-impact method for disrupting business operations, aligning with ATT&CK technique T1499.004 for network denial of service attacks through application or service disruption.
Mitigation strategies for CVE-2021-27595 should prioritize immediate patch deployment from SAP, as this represents the most effective solution to address the root cause of the vulnerability. Organizations should implement strict file validation policies for PDF content, particularly when dealing with external sources or untrusted email attachments. Network segmentation and access controls can help limit the potential impact of successful exploitation attempts by restricting access to the affected application. Additionally, user education and awareness programs should emphasize the dangers of opening PDF files from unknown sources, reinforcing safe computing practices that can prevent initial compromise. Security monitoring should include detection of application crash events and unusual restart patterns that may indicate exploitation attempts. The implementation of sandboxing mechanisms for PDF processing and regular security assessments of the SAP 3D Visual Enterprise Viewer environment can provide additional layers of protection against similar vulnerabilities. Organizations should also consider maintaining backup processes and alternative visualization tools to ensure business continuity during patch deployment or when the primary application becomes unavailable due to exploitation attempts.