CVE-2025-24443: Adobe Substance 3D Sampler Buffer Overflow

CVE-2025-24443 Overview

CVE-2025-24443 is a heap-based buffer overflow vulnerability in Adobe Substance 3D Sampler versions 4.5.2 and earlier. The flaw allows arbitrary code execution in the context of the current user when a victim opens a malicious file. The vulnerability is mapped to [CWE-122: Heap-based Buffer Overflow] and [CWE-787: Out-of-bounds Write].

Exploitation requires user interaction, limiting remote mass exploitation. However, attackers can weaponize crafted Substance project or asset files distributed through phishing, supply chain channels, or asset marketplaces. Adobe published the fix in Security Advisory APSB25-16.

Critical Impact
Successful exploitation grants arbitrary code execution under the privileges of the user running Substance 3D Sampler, enabling malware installation, credential theft, or lateral movement from a designer workstation.

Affected Products

Adobe Substance 3D Sampler 4.5.2 and earlier (Windows)
Adobe Substance 3D Sampler 4.5.2 and earlier (macOS)
All product configurations using the vulnerable file parsing component

Discovery Timeline

2025-03-11 - CVE-2025-24443 published to NVD
2025-03-11 - Adobe releases Security Advisory APSB25-16 with patched version
2025-04-01 - Last updated in NVD database

Technical Details for CVE-2025-24443

Vulnerability Analysis

The vulnerability is a heap-based buffer overflow in the file parsing logic of Substance 3D Sampler. When the application processes a crafted asset or project file, it writes past the bounds of a heap-allocated buffer. The out-of-bounds write corrupts adjacent heap metadata or function pointers, which an attacker controls to redirect execution flow.

Because Substance 3D Sampler runs in the user's security context, code execution inherits the user's tokens, file access, and network privileges. Designer and creative workstations frequently store credentials, signing keys, and access tokens for asset pipelines, making them attractive pivot points.

The attack vector is local and requires user interaction, but social engineering through shared .sbsar, .sbs, or imported texture files lowers the barrier. No authentication is required on the attacker side; the victim simply opens the file.

Root Cause

The root cause is improper validation of size or length values during deserialization of file structures. The parser allocates a heap buffer based on one input field, then copies content using a different attacker-controlled length, producing the out-of-bounds write characteristic of [CWE-787]. Adobe has not released detailed parser internals, so see the Adobe Security Advisory APSB25-16 for vendor-provided context.

Attack Vector

An attacker crafts a malicious Substance 3D asset and delivers it through email, a compromised asset library, or a shared production folder. When the target opens the file in a vulnerable version of Sampler, the parser triggers the overflow and executes attacker-controlled shellcode in the host process.

// No verified public proof-of-concept is available.
// Refer to Adobe Security Advisory APSB25-16 for vendor details.

Detection Methods for CVE-2025-24443

Indicators of Compromise

Unexpected child processes spawned by Adobe Substance 3D Sampler.exe, such as cmd.exe, powershell.exe, or rundll32.exe
Substance 3D Sampler crashes followed by suspicious process creation or persistence artifacts
Substance asset files (.sbsar, .sbs) sourced from untrusted email attachments or external shares
Outbound network connections from the Sampler process to non-Adobe infrastructure

Detection Strategies

Hunt for process lineage where Substance 3D Sampler is the parent of scripting or shell interpreters
Monitor for memory exception events (0xC0000005) in Sampler followed by anomalous user-mode activity
Inspect file write activity to startup, scheduled task, or run-key registry locations originating from the Sampler process

Monitoring Recommendations

Aggregate endpoint process telemetry from designer and 3D content creation workstations into a centralized analytics platform
Enable command-line and module load logging on systems running Adobe Creative Cloud applications
Track Substance 3D Sampler version inventory and flag hosts still on 4.5.2 or earlier

How to Mitigate CVE-2025-24443

Immediate Actions Required

Upgrade Adobe Substance 3D Sampler to the version listed as fixed in Adobe Security Advisory APSB25-16
Inventory all endpoints running Substance 3D Sampler and prioritize creative and design workstations for patching
Block inbound delivery of Substance asset files from untrusted external senders until patching is complete
Brief designers and 3D artists on the risk of opening Substance files from unknown sources

Patch Information

Adobe addressed CVE-2025-24443 in the update referenced by Security Advisory APSB25-16, published March 11, 2025. Apply the vendor-supplied update through Adobe Creative Cloud or the standalone installer. Verify the installed version is later than 4.5.2 after deployment.

Workarounds

Restrict opening of Substance 3D files to vetted internal asset libraries until the patch is applied
Run Substance 3D Sampler under a standard user account without local administrator privileges to limit post-exploitation impact
Use application allowlisting to prevent Substance 3D Sampler from launching child processes such as shells and scripting hosts

bash

# Verify installed Substance 3D Sampler version on Windows
reg query "HKLM\SOFTWARE\Adobe\Substance 3D Sampler" /v Version

# Verify installed Substance 3D Sampler version on macOS
defaults read "/Applications/Adobe Substance 3D Sampler.app/Contents/Info.plist" CFBundleShortVersionString