Description

Substance3D - Painter is affected by an out-of-bounds read vulnerability that could lead to disclosure of sensitive memory. An attacker could leverage this vulnerability to disclose sensitive information. 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": "5.5",
  "pubDate": "2026-08-25T18:18:03.670Z",
  "pubdate": "2026-08-25T18:18:03.670Z",
  "executiveSummary": "Substance3D Painter is susceptible to an out-of-bounds read vulnerability, a memory safety flaw that enables unauthorized disclosure of sensitive data residing in the application's memory space.\nThe vulnerability arises from improper boundary checks during the processing of input files. If a user opens a maliciously crafted file, the application may read data beyond the allocated buffer boundaries.\nThe primary impact of this flaw is the potential leakage of sensitive memory contents, which could include cryptographic keys, session tokens, or other confidential process data.\nExploitation is contingent upon user interaction, requiring a victim to explicitly open a malicious file within the Substance3D Painter environment.\nThis vulnerability poses a significant risk to data confidentiality, as it potentially allows an attacker to bypass memory isolation mechanisms. No specific authentication or network-level privileges are required to initiate an attack, provided the victim is coerced into interacting with the malicious file.",
  "technicalDetails": "The root cause of the vulnerability is an out-of-bounds (OOB) read flaw, which occurs when the software accesses memory at an offset outside the intended range of a buffer. In the context of Substance3D Painter, the defect exists within the file parsing logic responsible for interpreting specific structured file formats.\nWhen the application attempts to process a malicious file, the parser likely fails to validate the size metadata or length fields contained within the file headers or data blocks. If these values are manipulated to exceed the allocated memory buffer, subsequent read operations will proceed to access contiguous memory regions outside the intended data structure.\nThe attack flow proceeds as follows: First, an attacker constructs a malicious file characterized by malformed headers or invalid data segments designed to trigger an index overflow during the parsing phase. Second, the attacker distributes this file via social engineering or other delivery vectors. Third, upon opening the file in Substance3D Painter, the application’s internal buffers are populated with the malicious input, causing the parser to read adjacent memory locations. Finally, the application may inadvertently include the contents of this adjacent, unauthorized memory in its output, error messages, or internal state, allowing an attacker to exfiltrate the sensitive information.\nThe vulnerability does not require the attacker to have pre-existing privileges on the host system or network access; the exploit is purely client-side, triggered exclusively by the application's file-handling functions.\nThe post-exploitation impact includes the potential for information disclosure. By repeatedly leveraging the OOB read, an attacker may perform heap or stack reconnaissance, potentially gathering enough information to bypass Address Space Layout Randomization (ASLR) or other security features, further facilitating more complex attacks. The sensitive information retrieved could be used to facilitate credential theft or further privilege escalation within the user's environment."
}