CVE-2017-12082 in 3d Creation Suite
Summary
by MITRE
An exploitable integer overflow exists in the 'CustomData' Mesh loading functionality of the Blender open-source 3d creation suite. A .blend file with a specially crafted external data file can cause an integer overflow resulting in a buffer overflow which can allow for code execution under the context of the application. An attacker can convince a user to edit an object within a .blend library in their Scene in order to trigger this vulnerability.
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Analysis
by VulDB Data Team • 03/07/2023
The vulnerability identified as CVE-2017-12082 represents a critical security flaw within the Blender 3D creation suite that demonstrates the dangers of improper input validation in complex file parsing systems. This issue specifically affects the CustomData mesh loading functionality, which is a core component responsible for handling external data references within .blend files. The vulnerability arises from insufficient bounds checking during the processing of external data files, creating a scenario where maliciously crafted data can trigger unexpected behavior in the application's memory management systems.
The technical exploitation of this vulnerability occurs through an integer overflow condition that manifests when Blender processes specially crafted .blend files containing malicious external data references. The flaw exists in how the application calculates memory allocation for custom data structures during mesh loading operations, where integer overflow leads to insufficient buffer sizing. This integer overflow directly translates to a buffer overflow condition that can be leveraged by attackers to execute arbitrary code within the context of the running Blender application. The vulnerability is particularly concerning because it operates at the file parsing level, meaning that simply opening a maliciously crafted .blend file can trigger the exploit without requiring additional user interaction beyond the initial file opening.
The operational impact of CVE-2017-12082 extends beyond simple code execution, as it provides attackers with complete control over the victim's system when using Blender. This vulnerability aligns with CWE-190, which describes integer overflow conditions that can lead to buffer overflows, and demonstrates the broader implications of improper integer handling in memory-safe applications. The attack vector is particularly insidious because it can be triggered through normal user workflows, such as editing objects within a scene that references external libraries. This makes the vulnerability particularly dangerous in collaborative environments where users may unknowingly open malicious files shared within project libraries or asset repositories.
From a cybersecurity perspective, this vulnerability represents a classic example of how file format parsers can become attack surfaces when proper input validation is absent. The flaw operates within the ATT&CK framework under the technique of "Exploitation for Code Execution" and specifically demonstrates how vulnerabilities in legitimate software applications can be weaponized to achieve system compromise. The integer overflow condition creates a predictable pattern that attackers can exploit, making this vulnerability particularly dangerous as it does not require complex exploitation techniques beyond crafting the appropriate malicious file structure. Organizations using Blender in professional environments must consider this vulnerability as a critical risk factor, particularly in scenarios involving shared assets or collaborative workflows where file integrity cannot be guaranteed.
Mitigation strategies for CVE-2017-12082 should focus on both immediate patching and operational security measures. Users must ensure they are running patched versions of Blender that address this specific integer overflow condition in the CustomData mesh loading functionality. Additionally, organizations should implement strict file validation policies for any .blend files that are shared or imported into their workflows, particularly those originating from untrusted sources. The vulnerability highlights the importance of input validation and proper integer overflow protection in all file parsing operations, making it a valuable case study for security professionals developing secure file format parsers. Regular security updates and vulnerability assessments should be implemented to prevent similar issues from emerging in other components of the software ecosystem.