CVE-2025-34117

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Some device models include a non-standard implementation of the `echo` command, which may affect exploitability."}, {"lang": "es", "value": "Existe una vulnerabilidad de ejecuci\u00f3n remota de c\u00f3digo en varios modelos de routers Netcore y Netis con firmware publicado antes de agosto de 2014 debido a la presencia de un detector de puerta trasera no documentado en el puerto UDP 53413. Los l\u00edmites exactos de la versi\u00f3n a\u00fan no se han documentado. Un atacante remoto no autenticado puede enviar paquetes UDP especialmente manipulados para ejecutar comandos arbitrarios en el dispositivo afectado. Esta puerta trasera utiliza un mecanismo de autenticaci\u00f3n codificado y acepta comandos de shell tras la autenticaci\u00f3n. Algunos modelos de dispositivos incluyen una implementaci\u00f3n no est\u00e1ndar del comando `echo`, lo que podr\u00eda afectar su explotabilidad."}], "id": "CVE-2025-34117", "lastModified": "2026-06-17T09:13:29.910", "metrics": {"cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 9.3, "baseSeverity": "CRITICAL", "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": "NONE", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/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", "version": "4.0", "vulnAvailabilityImpact": "HIGH", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "disclosure@vulncheck.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2025-34117", "options": [{"exploitation": "poc"}, {"automatable": "yes"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2025-07-17T18:23:29.099684Z", "version": "2.0.3"}}]}, "published": "2025-07-16T21:15:26.550", "references": [{"source": "disclosure@vulncheck.com", "url": "https://raw.githubusercontent.com/rapid7/metasploit-framework/master/modules/exploits/linux/misc/netcore_udp_53413_backdoor.rb"}, {"source": "disclosure@vulncheck.com", "url": "https://vulners.com/metasploit/MSF:EXPLOIT-LINUX-MISC-NETCORE_UDP_53413_BACKDOOR-"}, {"source": "disclosure@vulncheck.com", "url": "https://web.archive.org/web/20140828114943/http://blog.trendmicro.com/trendlabs-security-intelligence/netis-routers-leave-wide-open-backdoor/"}, {"source": "disclosure@vulncheck.com", "url": "https://www.exploit-db.com/exploits/43387"}, {"source": "disclosure@vulncheck.com", "url": "https://www.seebug.org/vuldb/ssvid-90227"}, {"source": "disclosure@vulncheck.com", "url": "https://www.shadowserver.org/what-we-do/network-reporting/netcore-netis-router-vulnerability-scan-report/"}, {"source": "disclosure@vulncheck.com", "url": "https://www.vulncheck.com/advisories/netcore-netis-routers-backdoor-rce"}], "sourceIdentifier": "disclosure@vulncheck.com", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-78"}, {"lang": "en", "value": "CWE-306"}, {"lang": "en", "value": "CWE-912"}], "source": "disclosure@vulncheck.com", "type": "Secondary"}]}

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{"created": "2026-04-28T01:15:15.667035+00:00", "updated": "2026-10-17T14:30:09.596467+00:00", "vendors": []}