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{"cveTags": [], "descriptions": [{"lang": "en", "value": "Wazuh's File Integrity Monitoring (FIM), when configured with automatic threat removal, contains a time-of-check/time-of-use (TOCTOU) race condition that can allow a local, low-privileged attacker to cause the Wazuh service (running as NT AUTHORITY\\SYSTEM) to delete attacker-controlled files or paths. The root cause is insufficient synchronization and lack of robust final-path validation in the threat-removal workflow: the agent records an active-response action and proceeds to perform deletion without guaranteeing the deletion target is the originally intended file. This can result in SYSTEM-level arbitrary file or folder deletion and consequent local privilege escalation. Wazuh made an attempted fix via pull request 8697 on 2025-07-10, but that change was incomplete."}, {"lang": "es", "value": "La monitorizaci\u00f3n de integridad de archivos (FIM) de Wazuh, cuando se configura con eliminaci\u00f3n autom\u00e1tica de amenazas, contiene una condici\u00f3n de carrera (race condition) de tiempo de verificaci\u00f3n/tiempo de uso (TOCTOU) que puede permitir a un atacante local con pocos privilegios hacer que el servicio de Wazuh (ejecut\u00e1ndose como NT AUTHORITY\\SYSTEM) elimine archivos o rutas controlados por el atacante. La causa ra\u00edz es la sincronizaci\u00f3n insuficiente y la falta de una validaci\u00f3n robusta de la ruta final en el flujo de trabajo de eliminaci\u00f3n de amenazas: el agente registra una acci\u00f3n de respuesta activa y procede a realizar la eliminaci\u00f3n sin garantizar que el objetivo de la eliminaci\u00f3n sea el archivo originalmente previsto. Esto puede permitir la eliminaci\u00f3n arbitraria de archivos o carpetas a nivel de SYSTEM y la consecuente escalada de privilegios local. Wazuh intent\u00f3 una correcci\u00f3n a trav\u00e9spull request 8697 el 10-07-2025, pero ese cambio fue incompleto."}], "id": "CVE-2025-34294", "lastModified": "2025-10-30T15:05:32.197", "metrics": {"cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "HIGH", "attackRequirements": "PRESENT", "attackVector": "LOCAL", "availabilityRequirement": "NOT_DEFINED", "baseScore": 7.1, "baseSeverity": "HIGH", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "privilegesRequired": "LOW", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "HIGH", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "HIGH", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:L/AC:H/AT:P/PR:L/UI:N/VC:N/VI:H/VA:H/SC:N/SI:H/SA:H/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", "version": "4.0", "vulnAvailabilityImpact": "HIGH", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "HIGH", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "[email protected]", "type": "Secondary"}]}, "published": "2025-10-28T16:15:37.167", "references": [{"source": "[email protected]", "url": "https://documentation.wazuh.com/current/user-manual/capabilities/active-response/index.html"}, {"source": "[email protected]", "url": "https://github.com/wazuh/wazuh-documentation/pull/8697"}, {"source": "[email protected]", "url": "https://wazuh.com/blog/detecting-and-responding-to-malicious-files-using-cdb-lists-and-active-response/"}, {"source": "[email protected]", "url": "https://www.vulncheck.com/advisories/wazuh-file-integrity-monitoring-and-active-response-arbitrary-file-deletion-as-system"}], "sourceIdentifier": "[email protected]", "vulnStatus": "Awaiting Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-367"}], "source": "[email protected]", "type": "Secondary"}]}

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