CVE-2020-7082 in FBX-SDK
Summary
by MITRE
A use-after-free vulnerability in the Autodesk FBX-SDK versions 2019.0 and earlier may lead to code execution on a system running it.
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Analysis
by VulDB Data Team • 05/06/2025
The vulnerability identified as CVE-2020-7082 represents a critical use-after-free flaw within the Autodesk FBX-SDK software development kit, specifically affecting versions 2019.0 and earlier. This issue arises from improper memory management practices where freed memory blocks are still being accessed or referenced by subsequent operations, creating a predictable security weakness that adversaries can exploit to gain unauthorized system access. The FBX-SDK serves as a widely-used framework for 3D content creation and exchange, making this vulnerability particularly concerning given its potential to affect numerous applications across various industries including entertainment, gaming, and architectural visualization. The vulnerability manifests when the SDK processes certain malformed or specially crafted FBX files, which can trigger the use-after-free condition during memory deallocation and subsequent reuse operations.
The technical implementation of this vulnerability stems from inadequate null pointer checks and memory lifecycle management within the FBX-SDK's object handling mechanisms. When processing specific file structures, the SDK allocates memory for objects, performs operations on them, and subsequently frees the memory block. However, the code fails to properly invalidate references to these freed objects, allowing attackers to manipulate the memory layout and potentially redirect execution flow through controlled data manipulation. This flaw aligns with CWE-416, which specifically addresses use-after-free vulnerabilities, and demonstrates how improper memory management can lead to arbitrary code execution. The vulnerability is particularly dangerous because it can be triggered through legitimate file processing operations, making it difficult to distinguish between normal usage and malicious exploitation attempts.
The operational impact of CVE-2020-7082 extends far beyond simple system compromise, as it can enable attackers to execute arbitrary code with the privileges of the affected application. This capability allows threat actors to establish persistent backdoors, escalate privileges, or deploy additional malware within the target environment. The vulnerability affects not only end-user applications but also server-side applications that process FBX content, potentially creating supply chain attack vectors that could compromise entire networks. Given the widespread adoption of Autodesk products across creative industries, the exploitation of this vulnerability could result in significant financial losses, intellectual property theft, and system compromise across multiple organizations. The attack surface is particularly broad as many applications rely on the FBX-SDK for 3D content processing, including animation software, game engines, and architectural visualization tools.
Mitigation strategies for CVE-2020-7082 primarily focus on immediate version updates to Autodesk FBX-SDK 2020.0 and later releases, which contain the necessary memory management fixes to prevent the use-after-free condition. Organizations should implement comprehensive patch management procedures to ensure all affected systems receive updates promptly, particularly those running applications that process external 3D content. Network segmentation and file validation measures can provide additional defense-in-depth layers, including restricting file upload capabilities and implementing strict content filtering for FBX files. Security monitoring should be enhanced to detect unusual memory access patterns or unexpected code execution flows that might indicate exploitation attempts. The vulnerability also highlights the importance of secure coding practices and regular security assessments of third-party SDKs, as demonstrated by ATT&CK technique T1068 which covers local privilege escalation through software vulnerabilities. Organizations should also consider implementing application whitelisting policies and runtime protection mechanisms to prevent exploitation of similar memory corruption vulnerabilities in other software components.