Description

Substance3D - Designer 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": "2026-08-25T18:17:55.237Z",
  "pubdate": "2026-08-25T18:17:55.237Z",
  "executiveSummary": "A heap-based buffer overflow vulnerability exists within Substance3D Designer, a professional-grade procedural design software.\nThis vulnerability is categorized as a memory corruption issue that permits arbitrary code execution within the security context of the logged-in user.\nThe flaw stems from improper validation of input data during the processing of specialized file formats, which can be leveraged by an attacker to overwrite adjacent memory segments in the heap.\nThe primary risk implication is the potential for full system compromise, as successful exploitation grants the attacker the same permissions as the application user.\nThe exploitation requirement is strictly client-side; a remote attacker must induce a victim to open a maliciously crafted file, typically delivered via social engineering, email, or a compromised external file repository.\nNo authentication is required for exploitation; however, the successful delivery of a malicious payload is essential to trigger the heap corruption.",
  "technicalDetails": "The vulnerability resides in the memory management routines utilized by Substance3D Designer when parsing specific complex file structures. The root cause is a heap-based buffer overflow, typically resulting from an integer overflow or an undersized memory allocation during the deserialization or parsing phase of file operations.\nWhen the application attempts to load a malformed file, the vulnerable component fails to adequately enforce bounds checking on the input data stream before writing it into a pre-allocated heap buffer. By manipulating specific headers or data fields within the file, an attacker can trigger a write operation that exceeds the allocated boundary of the heap object.\nThe exploitation flow is as follows: 1) The attacker constructs a malicious file containing a payload designed to overwrite critical heap metadata, such as object pointers, function pointers, or virtual method tables (vtable). 2) Upon the victim opening this file, the application's parser processes the malicious structure, exceeding the heap buffer limits. 3) The memory corruption allows the attacker to redirect the application's control flow. 4) The payload, often delivered as shellcode or a ROP (Return-Oriented Programming) chain, executes with the user's process privileges.\nThis memory corruption is dangerous because it bypasses conventional software-based memory protections if the attacker successfully utilizes heap spraying or related techniques to place shellcode in a predictable location. Because the application runs with the user's full privileges, the attacker gains the ability to execute arbitrary commands, install persistent backdoors, or exfiltrate sensitive files accessible to the current user.\nThe vulnerability does not require network exposure in the traditional sense; it is triggered locally by the application's parsing engine upon file ingestion. No authentication or elevated administrative privileges are needed to initiate the attack, as the application's inherent lack of validation performs the malicious execution automatically upon file opening."
}