CVE-2025-43583 in Substance3D Viewer
Summary
by MITRE • 07/09/2025
Substance3D - Viewer versions 0.22 and earlier are affected by a NULL Pointer Dereference vulnerability that could lead to application denial-of-service. An attacker could exploit this vulnerability to crash the application, causing disruption in service. Exploitation of this issue requires user interaction in that a victim must open a malicious file.
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Analysis
by VulDB Data Team • 07/09/2025
The vulnerability identified as CVE-2025-43583 affects Substance3D Viewer versions 0.22 and earlier, representing a critical null pointer dereference flaw that compromises application stability and availability. This issue resides within the software's file processing mechanisms where improper input validation leads to unhandled memory access violations. The vulnerability manifests when the application attempts to dereference a null pointer during the parsing of malformed or malicious files, resulting in immediate application termination and complete service disruption for end users.
From a technical perspective, this null pointer dereference vulnerability falls under CWE-476 which specifically addresses null pointer dereference conditions in software implementations. The flaw occurs when the viewer application fails to properly validate file headers or structure elements before attempting to access memory locations that have not been initialized or allocated. The vulnerability is particularly concerning as it requires only user interaction to exploit, meaning victims must simply open a malicious file to trigger the crash condition. This user interaction requirement aligns with ATT&CK technique T1203 which describes user execution as a common attack vector for application-level exploits.
The operational impact of this vulnerability extends beyond simple denial-of-service conditions as it creates potential for broader service disruption within environments that rely on Substance3D Viewer for content creation or visualization tasks. Organizations using these vulnerable versions face significant risks including workflow interruptions, productivity losses, and potential data access limitations when the application crashes during critical operations. The vulnerability's exploitation method makes it particularly dangerous in collaborative environments where shared files may contain malicious content, as the crash occurs during normal file opening procedures without any advanced warning or user awareness of the underlying threat.
Mitigation strategies for this vulnerability should prioritize immediate version updates to Substance3D Viewer 0.23 or later, which contain patches addressing the null pointer dereference condition. Organizations should implement strict file validation procedures and user education programs to prevent accidental execution of potentially malicious files. Network-level controls including file type restrictions and content scanning mechanisms can provide additional protection layers. Security teams should monitor for exploitation attempts through system logs and implement application whitelisting policies to restrict execution of unauthorized viewer versions. The vulnerability demonstrates the importance of robust input validation and proper error handling in preventing denial-of-service conditions that can severely impact operational continuity and user productivity within creative and design environments.