{"attribution":"This product uses data from the NVD API but is not endorsed or certified by the NVD.","cve":{"id":"CVE-2021-33621","sourceIdentifier":"cve@mitre.org","published":"2022-11-18T23:15:18.987","lastModified":"2026-06-17T03:54:52.923","vulnStatus":"Modified","cveTags":[],"descriptions":[{"lang":"en","value":"The cgi gem before 0.1.0.2, 0.2.x before 0.2.2, and 0.3.x before 0.3.5 for Ruby allows HTTP response splitting. This is relevant to applications that use untrusted user input either to generate an HTTP response or to create a CGI::Cookie object."},{"lang":"es","value":"La gema cgi anterior a 0.1.0.2, 0.2.x anterior a 0.2.2 y 0.3.x anterior a 0.3.5 para Ruby permite la división de respuestas HTTP. Esto es relevante para aplicaciones que utilizan entradas de usuarios que no son de confianza, ya sea para generar una respuesta HTTP o para crear un objeto CGI::Cookie."}],"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:L/UI:N/S:U/C:H/I:H/A:H","baseScore":8.8,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"},"exploitabilityScore":2.8,"impactScore":5.9}]},"weaknesses":[{"source":"nvd@nist.gov","type":"Primary","description":[{"lang":"en","value":"CWE-74"}]}],"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:ruby-lang:cgi:*:*:*:*:*:ruby:*:*","versionEndExcluding":"0.1.0.2","matchCriteriaId":"CABF5DC4-7B4F-4548-B2DF-914B096246B8"},{"vulnerable":true,"criteria":"cpe:2.3:a:ruby-lang:cgi:*:*:*:*:*:ruby:*:*","versionStartIncluding":"0.2.0","versionEndExcluding":"0.2.2","matchCriteriaId":"E6B2E611-4DD9-4265-AC1E-AA10826582D2"},{"vulnerable":true,"criteria":"cpe:2.3:a:ruby-lang:cgi:*:*:*:*:*:ruby:*:*","versionStartIncluding":"0.3.0","versionEndExcluding":"0.3.5","matchCriteriaId":"A6DA6066-2A67-4EE2-934F-3A0CF3D66AA7"}]}]},{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*","matchCriteriaId":"80E516C0-98A4-4ADE-B69F-66A772E2BAAA"},{"vulnerable":true,"criteria":"cpe:2.3:o:fedoraproject:fedora:36:*:*:*:*:*:*:*","matchCriteriaId":"5C675112-476C-4D7C-BCB9-A2FB2D0BC9FD"},{"vulnerable":true,"criteria":"cpe:2.3:o:fedoraproject:fedora:37:*:*:*:*:*:*:*","matchCriteriaId":"E30D0E6F-4AE8-4284-8716-991DFA48CC5D"}]}]},{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:ruby-lang:ruby:*:*:*:*:*:*:*:*","versionStartIncluding":"2.7.0","versionEndExcluding":"2.7.7","matchCriteriaId":"3553CC40-CE13-48A8-B959-0C0B96F1FAD1"},{"vulnerable":true,"criteria":"cpe:2.3:a:ruby-lang:ruby:*:*:*:*:*:*:*:*","versionStartIncluding":"3.0.0","versionEndExcluding":"3.0.5","matchCriteriaId":"3047B1E3-1CB1-4270-AB66-CF194AECB87E"},{"vulnerable":true,"criteria":"cpe:2.3:a:ruby-lang:ruby:*:*:*:*:*:*:*:*","versionStartIncluding":"3.1.0","versionEndExcluding":"3.1.3","matchCriteriaId":"576D85B3-8EA3-42F8-89FE-316057C9971D"}]}]}],"references":[{"url":"https://lists.debian.org/debian-lts-announce/2023/06/msg00012.html","source":"cve@mitre.org"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DQR7LWED6VAPD5ATYOBZIGJQPCUBRJBX/","source":"cve@mitre.org"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/THVTYHHEOVLQFCFHWURZYO7PVUPBHRZD/","source":"cve@mitre.org"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YACE6ORF2QBXXBK2V2CM36D7TZMEJVAS/","source":"cve@mitre.org"},{"url":"https://security.gentoo.org/glsa/202401-27","source":"cve@mitre.org"},{"url":"https://security.netapp.com/advisory/ntap-20221228-0004/","source":"cve@mitre.org","tags":["Third Party Advisory"]},{"url":"https://www.ruby-lang.org/en/news/2022/11/22/http-response-splitting-in-cgi-cve-2021-33621/","source":"cve@mitre.org","tags":["Exploit","Third Party Advisory"]},{"url":"https://lists.debian.org/debian-lts-announce/2023/06/msg00012.html","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.debian.org/debian-lts-announce/2024/09/msg00000.html","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DQR7LWED6VAPD5ATYOBZIGJQPCUBRJBX/","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/THVTYHHEOVLQFCFHWURZYO7PVUPBHRZD/","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YACE6ORF2QBXXBK2V2CM36D7TZMEJVAS/","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://security.gentoo.org/glsa/202401-27","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://security.netapp.com/advisory/ntap-20221228-0004/","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Third Party Advisory"]},{"url":"https://www.ruby-lang.org/en/news/2022/11/22/http-response-splitting-in-cgi-cve-2021-33621/","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Exploit","Third Party Advisory"]}]}}