Description

Substance3D - Painter is affected by a Heap-based Buffer Overflow vulnerability that could result in arbitrary code execution in the context of the current user. Exploitation of this issue requires user interaction in that a victim must open a malicious file.

Executive Summary

Technical Details

Mitigations

References

Additional Metadata

{
  "score": "7.8",
  "pubDate": "2026-08-25T18:18:04.257Z",
  "pubdate": "2026-08-25T18:18:04.257Z",
  "executiveSummary": "Substance3D - Painter is susceptible to a heap-based buffer overflow vulnerability, categorized as a critical memory safety flaw. This vulnerability arises from improper handling of specific file structures during the parsing process, potentially enabling arbitrary code execution.\nThe impact of this vulnerability is severe, as successful exploitation allows an attacker to execute malicious code within the security context of the current user. This could lead to full compromise of the user session, unauthorized data access, or the deployment of further malicious payloads.\nThe vulnerability affects Substance3D - Painter. Exploitation requires user interaction; specifically, an attacker must successfully induce a target user to open a specially crafted, malicious file within the application.\nThere are no authentication requirements for this exploit, as the attack vector is local file processing. The risk is heightened by the potential for attackers to distribute malicious files via standard communication channels (e.g., email, file sharing services) to entice users.",
  "technicalDetails": "The identified vulnerability is a heap-based buffer overflow occurring within the file parsing logic of Substance3D - Painter. A heap buffer overflow occurs when a program writes more data to a buffer located in the heap memory segment than that buffer is allocated to hold. In this instance, the flaw exists within the component responsible for interpreting and deserializing user-supplied file formats.\nThe root cause is likely an insufficient boundary check during the processing of complex data structures or object headers within the malicious file. When Substance3D - Painter attempts to load or render these malformed structures, the application performs an out-of-bounds write operation into the heap heap space. This overwrite can corrupt adjacent memory objects, including function pointers, virtual method tables (vtable), or other critical data structures managed by the heap allocator.\nThe attack flow proceeds as follows: First, an attacker constructs a malicious file containing oversized or malformed data segments specifically designed to trigger the overflow during the parsing phase. Second, the attacker distributes this file to the victim. Third, the victim opens the malicious file using Substance3D - Painter. Fourth, as the application processes the file, the vulnerable parsing function exceeds the allocated heap buffer size, causing the heap corruption. Finally, the attacker leverages the corrupted memory to redirect the application's execution flow. By overwriting specific pointers, the attacker can force the application to execute arbitrary shellcode or perform Return-Oriented Programming (ROP) to bypass Data Execution Prevention (DEP) and Address Space Layout Randomization (ASLR).\nBecause the application executes the code with the privileges of the user who launched the software, the post-exploitation impact is limited only by the permissions granted to that user. An attacker could establish persistence, exfiltrate intellectual property, or use the compromised host as a pivot point within a corporate network. This vulnerability does not require prior authentication, as the execution is triggered locally upon file access."
}