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": "2026-08-25T18:18:03.520Z",
  "pubdate": "2026-08-25T18:18:03.520Z",
  "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 payloads with the privileges of the currently logged-in user. This may lead to complete system compromise, data exfiltration, or the installation of persistent threats.\nThe vulnerability is triggered when a user opens a specially crafted, malicious file within the Substance3D - Painter environment. Consequently, exploitation is contingent upon user interaction (social engineering). No authentication or network exposure is required to initiate the attack; however, once the malicious file is processed, the attacker gains the ability to manipulate the application's process memory.\nGiven that the application runs in the context of the user, the risk implications are significant for professional environments where users frequently import external assets. Organizations must prioritize caution when interacting with untrusted project files or 3D models until vendor-supplied patches are applied.",
  "technicalDetails": "The root cause of this vulnerability is a heap-based buffer overflow occurring during the deserialization or parsing of malformed input files by Substance3D - Painter. When the application attempts to process data structures within a corrupted or maliciously crafted file, the input validation routines fail to correctly verify the length of the data being copied into a pre-allocated heap buffer.\nSpecifically, the application logic likely lacks appropriate bounds checking when moving data from a file-backed buffer into a fixed-size heap memory region. When an attacker provides a file containing data that exceeds the capacity of the destination buffer, the write operation spills into adjacent memory structures on the heap. This allows for the corruption of heap metadata or the overwriting of critical objects, such as function pointers or object vtables.\nThe attack flow begins when a user is convinced to open a malicious asset file using the affected version of Substance3D - Painter. Upon opening the file, the application's parser initializes memory buffers to accommodate the file's contents. If the malicious payload includes carefully crafted headers or stream data that triggers the overflow, the attacker can hijack the application's execution flow. By overwriting function pointers on the heap with the address of an attacker-controlled payload (often delivered via shellcode included in the file), the attacker redirects the application's control flow.\nBecause the payload executes within the context of the current user, it inherits the user's effective permissions. This facilitates a wide array of post-exploitation activities, including local privilege escalation, lateral movement within the network, or the deployment of secondary malware payloads. Since this occurs in memory, the exploitation may bypass traditional signature-based file scanners if the primary attack vector resides entirely within the dynamic heap processing phase.\nExploitation does not require authentication or network access; however, the reliance on user interaction suggests that attackers will likely utilize social engineering tactics—such as hosting malicious project files on forums or distributing them through untrusted downloads—to maximize the impact. As the vulnerability resides in the core parsing engine of Substance3D - Painter, all workflows that involve the importing of external assets are considered potentially exposed to this memory corruption vector."
}