{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2024-45614","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2024-09-02T16:00:02.425Z","datePublished":"2024-09-19T22:42:33.974Z","dateUpdated":"2025-11-03T22:15:51.621Z"},"containers":{"cna":{"title":"Header normalization allows for client to clobber proxy set headers in Puma","problemTypes":[{"descriptions":[{"cweId":"CWE-639","lang":"en","description":"CWE-639: Authorization Bypass Through User-Controlled Key","type":"CWE"}]}],"metrics":[{"cvssV3_1":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":5.4,"baseSeverity":"MEDIUM","confidentialityImpact":"LOW","integrityImpact":"LOW","privilegesRequired":"NONE","scope":"CHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N","version":"3.1"}}],"references":[{"name":"https://github.com/puma/puma/security/advisories/GHSA-9hf4-67fc-4vf4","tags":["x_refsource_CONFIRM"],"url":"https://github.com/puma/puma/security/advisories/GHSA-9hf4-67fc-4vf4"},{"name":"https://nginx.org/en/docs/http/ngx_http_core_module.html#underscores_in_headers","tags":["x_refsource_MISC"],"url":"https://nginx.org/en/docs/http/ngx_http_core_module.html#underscores_in_headers"}],"affected":[{"vendor":"puma","product":"puma","versions":[{"version":">= 6.0.0, < 6.4.3","status":"affected"},{"version":"< 5.6.9","status":"affected"}]}],"providerMetadata":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2024-09-19T22:42:33.974Z"},"descriptions":[{"lang":"en","value":"Puma is a Ruby/Rack web server built for parallelism. In affected versions clients could clobber values set by intermediate proxies (such as X-Forwarded-For) by providing a underscore version of the same header (X-Forwarded_For). Any users relying on proxy set variables is affected. v6.4.3/v5.6.9 now discards any headers using underscores if the non-underscore version also exists. Effectively, allowing the proxy defined headers to always win. Users are advised to upgrade. Nginx has a underscores_in_headers configuration variable to discard these headers at the proxy level as a mitigation. Any users that are implicitly trusting the proxy defined headers for security should immediately cease doing so until upgraded to the fixed versions."}],"source":{"advisory":"GHSA-9hf4-67fc-4vf4","discovery":"UNKNOWN"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2024-09-20T13:54:35.745068Z","id":"CVE-2024-45614","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2024-09-20T13:54:50.515Z"}},{"title":"CVE Program Container","references":[{"url":"https://lists.debian.org/debian-lts-announce/2024/11/msg00004.html"}],"providerMetadata":{"orgId":"af854a3a-2127-422b-91ae-364da2661108","shortName":"CVE","dateUpdated":"2025-11-03T22:15:51.621Z"}}]}}