fkie_cve-2025-34294
Vulnerability from fkie_nvd
Published
2025-10-28 16:15
Modified
2025-10-30 15:05
Severity ?
7.1 (High) - 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
Summary
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.
References
disclosure@vulncheck.comhttps://documentation.wazuh.com/current/user-manual/capabilities/active-response/index.html
disclosure@vulncheck.comhttps://github.com/wazuh/wazuh-documentation/pull/8697
disclosure@vulncheck.comhttps://wazuh.com/blog/detecting-and-responding-to-malicious-files-using-cdb-lists-and-active-response/
disclosure@vulncheck.comhttps://www.vulncheck.com/advisories/wazuh-file-integrity-monitoring-and-active-response-arbitrary-file-deletion-as-system
Impacted products
Vendor Product Version


To clipboard 

{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Wazuh\u0027s 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": "disclosure@vulncheck.com",
        "type": "Secondary"
      }
    ]
  },
  "published": "2025-10-28T16:15:37.167",
  "references": [
    {
      "source": "disclosure@vulncheck.com",
      "url": "https://documentation.wazuh.com/current/user-manual/capabilities/active-response/index.html"
    },
    {
      "source": "disclosure@vulncheck.com",
      "url": "https://github.com/wazuh/wazuh-documentation/pull/8697"
    },
    {
      "source": "disclosure@vulncheck.com",
      "url": "https://wazuh.com/blog/detecting-and-responding-to-malicious-files-using-cdb-lists-and-active-response/"
    },
    {
      "source": "disclosure@vulncheck.com",
      "url": "https://www.vulncheck.com/advisories/wazuh-file-integrity-monitoring-and-active-response-arbitrary-file-deletion-as-system"
    }
  ],
  "sourceIdentifier": "disclosure@vulncheck.com",
  "vulnStatus": "Awaiting Analysis",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-367"
        }
      ],
      "source": "disclosure@vulncheck.com",
      "type": "Secondary"
    }
  ]
}


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