CVE-2026-73973

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{"affected": [{"affectedData": [{"product": "monitoring-plugins", "vendor": "Linuxfabrik", "versions": [{"status": "affected", "version": "< 7.0.0"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Linuxfabrik Monitoring Plugins provides monitoring plugins for Icinga, Nagios, and related systems. Prior to version 7.0.0, check-plugins/logfile/logfile accepted a free-form --filename path and opened it as root when invoked through the shipped nagios or icinga sudoers allowlist, without confining the resolved path to /var/log. An attacker who controls the monitoring account can select a root-readable file such as /etc/shadow and use --warning-regex . while leaving SUPPRESS_OUTPUT false, causing each nonempty line to be collected in warn_matches and returned through lib.base.oao(). The vulnerable flow passes the expanded scan_path directly to open(), and neither real-path containment nor an allowlist protects the sink. The same fix also confines mysql-logfile and openvpn-client-list paths, allows only documented log roots, and resolves symlinks and parent-directory traversal before checking containment. This issue is fixed in version 7.0.0."}, {"lang": "es", "value": "Linuxfabrik Monitoring Plugins proporciona plugins de monitorizaci\u00f3n para Icinga, Nagios y sistemas relacionados. Antes de la versi\u00f3n 7.0.0, check-plugins/logfile/logfile aceptaba una ruta --filename de formato libre y la abr\u00eda como root cuando se invocaba a trav\u00e9s de la lista de permitidos (allowlist) de sudoers de nagios o icinga incluida, sin confinar la ruta resuelta a /var/log. Un atacante que controla la cuenta de monitorizaci\u00f3n puede seleccionar un archivo legible por root como /etc/sha4dow y usar --warning-regex . mientras deja SUPPRESS_OUTPUT en false, haciendo que cada l\u00ednea no vac\u00eda se recoja en warn_matches y se devuelva a trav\u00e9s de lib.base.oao(). El flujo vulnerable pasa la scan_path expandida directamente a open(), y ni la contenci\u00f3n de ruta real ni una lista de permitidos (allowlist) protegen el sumidero. La misma correcci\u00f3n tambi\u00e9n confina las rutas de MySQL-logfile y openvpn-client-list, permite solo ra\u00edces de registro documentadas y resuelve enlaces simb\u00f3licos y salto de directorio padre antes de verificar la contenci\u00f3n. Este problema est\u00e1 corregido en la versi\u00f3n 7.0.0."}], "id": "CVE-2026-73973", "lastModified": "2026-10-22T16:09:59.560", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "NONE", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-73973", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-08-19T19:19:51.315696Z", "version": "2.0.3"}}]}, "published": "2026-08-18T22:17:33.667", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/Linuxfabrik/monitoring-plugins/blob/ae486fc629e1ca9373e1b6dd5e395603ee453bbc/CHANGELOG.md#v700---2026-08-14"}, {"source": "security-advisories@github.com", "url": "https://github.com/Linuxfabrik/monitoring-plugins/commit/a0ca1268d84e0caf10442b9c7477d699b52d1c92"}, {"source": "security-advisories@github.com", "url": "https://github.com/Linuxfabrik/monitoring-plugins/releases/tag/v7.0.0"}, {"source": "security-advisories@github.com", "url": "https://github.com/Linuxfabrik/monitoring-plugins/security/advisories/GHSA-f54c-p5vg-mr5c"}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "url": "https://github.com/Linuxfabrik/monitoring-plugins/security/advisories/GHSA-f54c-p5vg-mr5c"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-22"}, {"lang": "en", "value": "CWE-269"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{}

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