CVE-2026-7990 Chrome Updater权限提升漏洞

# Conceptual PoC for CVE-2026-7990 # This script demonstrates a check for the vulnerable version and simulates the logic of insufficient input validation. import os import sys def check_vulnerability(): # Simulate checking Chrome version # In a real exploit, the version would be queried from the registry or file system target_version = "148.0.7778.96" current_version = "148.0.7778.95" # Hypothetical vulnerable version # Simple version comparison logic if current_version < target_version: print(f"[+] Vulnerable version found: {current_version}") return True else: print("[-] Patched version found.") return False def simulate_insufficient_validation(): # Simulate the Updater processing a malicious file # The vulnerability lies in not validating the source of the file sufficiently print("[*] Simulating Updater processing a malicious file...") # In the vulnerable scenario, the updater accepts a file path from an untrusted source # and executes operations with high privileges (OS-level) malicious_file_path = "C:\Temp\malicious_update.bin" # Hypothetical insecure operation if os.path.exists(malicious_file_path): print(f"[!] Processing untrusted input: {malicious_file_path}") print("[!] Privilege escalation triggered via Updater component.") return True else: print("[File not found, creating dummy file for demonstration]") with open(malicious_file_path, 'w') as f: f.write("malicious_payload") return simulate_insufficient_validation() if __name__ == "__main__": print("--- CVE-2026-7990 PoC Simulation ---") if check_vulnerability(): simulate_insufficient_validation() else: print("System is not vulnerable to this specific check.")