CVE-2018-3953

{"id": "CVE-2018-3953", "metrics": {"cvssMetricV2": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"version": "2.0", "baseScore": 9.0, "accessVector": "NETWORK", "vectorString": "AV:N/AC:L/Au:S/C:C/I:C/A:C", "authentication": "SINGLE", "integrityImpact": "COMPLETE", "accessComplexity": "LOW", "availabilityImpact": "COMPLETE", "confidentialityImpact": "COMPLETE"}, "acInsufInfo": false, "impactScore": 10.0, "baseSeverity": "HIGH", "obtainAllPrivilege": false, "exploitabilityScore": 8.0, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": false}], "cvssMetricV30": [{"type": "Secondary", "source": "talos-cna@cisco.com", "cvssData": {"scope": "UNCHANGED", "version": "3.0", "baseScore": 7.2, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "HIGH", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 1.2}], "cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.2, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "HIGH", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 1.2}]}, "published": "2018-10-17T02:29:01.420", "references": [{"url": "https://talosintelligence.com/vulnerability_reports/TALOS-2018-0625", "tags": ["Exploit", "Third Party Advisory"], "source": "talos-cna@cisco.com"}, {"url": "https://talosintelligence.com/vulnerability_reports/TALOS-2018-0625", "tags": ["Exploit", "Third Party Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}], "vulnStatus": "Modified", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-78"}]}], "descriptions": [{"lang": "en", "value": "Devices in the Linksys ESeries line of routers (Linksys E1200 Firmware Version 2.0.09 and Linksys E2500 Firmware Version 3.0.04) are susceptible to OS command injection vulnerabilities due to improper filtering of data passed to and retrieved from NVRAM. Data entered into the 'Router Name' input field through the web portal is submitted to apply.cgi as the value to the 'machine_name' POST parameter. When the 'preinit' binary receives the SIGHUP signal, it enters a code path that continues until it reaches offset 0x0042B5C4 in the 'start_lltd' function. Within the 'start_lltd' function, a 'nvram_get' call is used to obtain the value of the user-controlled 'machine_name' NVRAM entry. This value is then entered directly into a command intended to write the host name to a file and subsequently executed."}, {"lang": "es", "value": "Los dispositivos de la l\u00ednea de routers Linksys ESeries (Linksys E1200 con versi\u00f3n del firmware 2.0.09 y Linksys E2500 con versi\u00f3n del firmware 3.0.04) son susceptibles a vulnerabilidades de inyecci\u00f3n de comandos debido al filtrado incorrecto de datos pasados y recuperados desde el NVRAM. Los datos introducidos en el campo de entrada \"Router Name\" mediante el portal web se env\u00edan a apply.cgi como el valor del par\u00e1metro POST \"machine_name\". Cuando el binario \"preinit\" recibe la se\u00f1al SIGHUP, introduce una ruta de c\u00f3digo que contin\u00faa hasta que alcanza el offset 0x0042B5C4 en la funci\u00f3n \"start_lltd\". En la funci\u00f3n \"start_lltd\", se emplea una llamada \"nvram_get\" para obtener el valor de la entrada NVRAM \"machine_name\" controlada por el usuario. Este valor se introduce en un comando que debe escribir el nombre del host en un archivo y despu\u00e9s se ejecuta."}], "lastModified": "2024-11-21T04:06:22.467", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linksys:e1200_firmware:2.0.09:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "D814CD48-1D88-4F06-A235-BB9EA8EB8D07"}], "operator": "OR"}, {"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:h:linksys:e1200:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "47605441-7B24-4FF5-9956-6836117130EA"}], "operator": "OR"}], "operator": "AND"}, {"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linksys:e2500_firmware:3.0.04:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "4E7346C0-5E2E-4840-AA3C-F23527C81A51"}], "operator": "OR"}, {"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:h:linksys:e2500:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "D37D6660-2A10-44A6-8CAF-F5BC5F6C476E"}], "operator": "OR"}], "operator": "AND"}], "sourceIdentifier": "talos-cna@cisco.com"}