{"attribution":"This product uses data from the NVD API but is not endorsed or certified by the NVD.","cve":{"id":"CVE-2019-20637","sourceIdentifier":"cve@mitre.org","published":"2020-04-08T23:15:12.623","lastModified":"2026-06-17T02:30:51.083","vulnStatus":"Modified","cveTags":[],"descriptions":[{"lang":"en","value":"An issue was discovered in Varnish Cache before 6.0.5 LTS, 6.1.x and 6.2.x before 6.2.2, and 6.3.x before 6.3.1. It does not clear a pointer between the handling of one client request and the next request within the same connection. This sometimes causes information to be disclosed from the connection workspace, such as data structures associated with previous requests within this connection or VCL-related temporary headers."},{"lang":"es","value":"Se detectó un problema en Varnish Cache versiones anteriores a 6.0.5 LTS, versiones 6.1.x y versiones 6.2.x anteriores a 6.2.2 y versiones 6.3.x anteriores a 6.3.1. No borra un puntero entre el manejo de una petición de cliente y la siguiente petición dentro de la misma conexión. Esto a veces causa que la información sea revelada desde el espacio de trabajo de la conexión, tales como las estructuras de datos asociadas con peticiones anteriores dentro de esta conexión o los encabezados temporales relacionados con VCL."}],"affected":[{"source":"cve@mitre.org","affectedData":[{"vendor":"n/a","product":"n/a","versions":[{"version":"n/a","status":"affected"}]}]}],"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:H/I:N/A:N","baseScore":7.5,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"NONE","availabilityImpact":"NONE"},"exploitabilityScore":3.9,"impactScore":3.6}],"cvssMetricV2":[{"source":"nvd@nist.gov","type":"Primary","cvssData":{"version":"2.0","vectorString":"AV:N/AC:L/Au:N/C:P/I:N/A:N","baseScore":5.0,"accessVector":"NETWORK","accessComplexity":"LOW","authentication":"NONE","confidentialityImpact":"PARTIAL","integrityImpact":"NONE","availabilityImpact":"NONE"},"baseSeverity":"MEDIUM","exploitabilityScore":10.0,"impactScore":2.9,"acInsufInfo":false,"obtainAllPrivilege":false,"obtainUserPrivilege":false,"obtainOtherPrivilege":false,"userInteractionRequired":false}]},"weaknesses":[{"source":"nvd@nist.gov","type":"Primary","description":[{"lang":"en","value":"CWE-212"}]}],"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:varnish-cache:varnish_cache:*:*:*:*:-:*:*:*","versionStartIncluding":"6.1.0","versionEndExcluding":"6.2.2","matchCriteriaId":"5C080F73-9811-489C-AE92-DE0433AE3688"},{"vulnerable":true,"criteria":"cpe:2.3:a:varnish-cache:varnish_cache:*:*:*:*:-:*:*:*","versionStartIncluding":"6.3.0","versionEndExcluding":"6.3.1","matchCriteriaId":"201226B6-1032-4A79-B785-CCFFFC31437D"},{"vulnerable":true,"criteria":"cpe:2.3:a:varnish-software:varnish_cache:*:*:*:*:lts:*:*:*","versionStartIncluding":"6.0.0","versionEndExcluding":"6.0.5","matchCriteriaId":"4111AFB3-49AC-41ED-9ED1-187C0FAFD357"}]}]},{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:opensuse:backports_sle:15.0:sp1:*:*:*:*:*:*","matchCriteriaId":"40513095-7E6E-46B3-B604-C926F1BA3568"},{"vulnerable":true,"criteria":"cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:*","matchCriteriaId":"B620311B-34A3-48A6-82DF-6F078D7A4493"}]}]}],"references":[{"url":"http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00026.html","source":"cve@mitre.org","tags":["Mailing List","Third Party Advisory"]},{"url":"http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00031.html","source":"cve@mitre.org","tags":["Mailing List","Third Party Advisory"]},{"url":"http://varnish-cache.org/security/VSV00004.html#vsv00004","source":"cve@mitre.org","tags":["Vendor Advisory"]},{"url":"http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00026.html","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Mailing List","Third Party Advisory"]},{"url":"http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00031.html","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Mailing List","Third Party Advisory"]},{"url":"http://varnish-cache.org/security/VSV00004.html#vsv00004","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Vendor Advisory"]}]}}