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El problema radica en cómo el cliente FTP confía en el host a partir de la respuesta PASV por defecto. Este fallo permite a un atacante configurar un servidor FTP malicioso que puede engañar a los clientes FTP para que sean conectados a una dirección IP y un puerto determinados. Esta vulnerabilidad podría conllevar a que los clientes FTP escanearan los puertos, lo que de otro modo no habría sido posible."}],"metrics":{"cvssMetricV31":[{"source":"nvd@nist.gov","type":"Primary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","baseScore":5.3,"baseSeverity":"MEDIUM","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"LOW","integrityImpact":"NONE","availabilityImpact":"NONE"},"exploitabilityScore":3.9,"impactScore":1.4},{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","baseScore":5.3,"baseSeverity":"MEDIUM","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"LOW","integrityImpact":"NONE","availabilityImpact":"NONE"},"exploitabilityScore":3.9,"impactScore":1.4}]},"weaknesses":[{"source":"nvd@nist.gov","type":"Primary","description":[{"lang":"en","value":"CWE-252"}]},{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","type":"Secondary","description":[{"lang":"en","value":"CWE-252"}]}],"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:python:python:*:*:*:*:*:*:*:*","versionStartIncluding":"3.6.0","versionEndExcluding":"3.6.14","matchCriteriaId":"98AE93B0-882A-42C5-B3A4-8B4D810AB111"},{"vulnerable":true,"criteria":"cpe:2.3:a:python:python:*:*:*:*:*:*:*:*","versionStartIncluding":"3.7.0","versionEndExcluding":"3.7.11","matchCriteriaId":"63D83236-D590-43D4-82C0-B0C656E02A29"},{"vulnerable":true,"criteria":"cpe:2.3:a:python:python:*:*:*:*:*:*:*:*","versionStartIncluding":"3.8.0","versionEndExcluding":"3.8.9","matchCriteriaId":"A39F58D2-FB1D-4865-AF30-1A529F467D74"},{"vulnerable":true,"criteria":"cpe:2.3:a:python:python:*:*:*:*:*:*:*:*","versionStartIncluding":"3.9.0","versionEndExcluding":"3.9.3","matchCriteriaId":"B19E0ABC-7E51-4870-BE02-F9D41409BE58"},{"vulnerable":true,"criteria":"cpe:2.3:a:python:python:3.10.0:-:*:*:*:*:*:*","matchCriteriaId":"36027ED3-D643-4ACE-A43C-725C8E0BD99F"}]}]},{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*","matchCriteriaId":"07B237A9-69A3-4A9C-9DA0-4E06BD37AE73"},{"vulnerable":true,"criteria":"cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*","matchCriteriaId":"FA6FEEC2-9F11-4643-8827-749718254FED"}]}]},{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:redhat:software_collections:-:*:*:*:*:*:*:*","matchCriteriaId":"749804DA-4B27-492A-9ABA-6BB562A6B3AC"},{"vulnerable":true,"criteria":"cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*","matchCriteriaId":"F4CFF558-3C47-480D-A2F0-BABF26042943"}]}]},{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:netapp:ontap_select_deploy_administration_utility:-:*:*:*:*:*:*:*","matchCriteriaId":"E7CF3019-975D-40BB-A8A4-894E62BD3797"}]}]}],"references":[{"url":"https://access.redhat.com/security/cve/CVE-2021-4189","source":"secalert@redhat.com","tags":["Third 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