{"id":"CVE-2021-29479","state":"PUBLISHED","title":"Cached redirect poisoning via X-Forwarded-Host header","description":"Ratpack is a toolkit for creating web applications. In versions prior to 1.9.0, a user supplied `X-Forwarded-Host` header can be used to perform cache poisoning of a cache fronting a Ratpack server if the cache key does not include the `X-Forwarded-Host` header as a cache key. Users are only vulnerable if they do not configure a custom `PublicAddress` instance. For versions prior to 1.9.0, by default, Ratpack utilizes an inferring version of `PublicAddress` which is vulnerable. This can be used to perform redirect cache poisoning where an attacker can force a cached redirect to redirect to their site instead of the intended redirect location. The vulnerability was patched in Ratpack 1.9.0. As a workaround, ensure that `ServerConfigBuilder::publicAddress` correctly configures the server in production.","publishedAt":"2021-06-29T14:35:12.000Z","updatedAt":"2024-08-03T22:11:05.264Z","severity":{"score":7,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:L","source":"GitHub_M"},"assigner":"GitHub_M","products":["ratpack ratpack"],"affected":[{"vendor":"ratpack","product":"ratpack","versions":[{"version":"< 1.9.0","status":"affected"}]}],"references":["https://portswigger.net/web-security/web-cache-poisoning","https://github.com/ratpack/ratpack/security/advisories/GHSA-w6rq-6h34-vh7q"],"weaknesses":["CWE-807"],"ingestedAt":"2026-10-29T19:48:21.578Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2021/29xxx/CVE-2021-29479.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.1","cveMetadata":{"cveId":"CVE-2021-29479","state":"PUBLISHED","datePublished":"2021-06-29T14:35:12.000Z","dateUpdated":"2024-08-03T22:11:05.264Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2021-03-30T00:00:00.000Z"},"containers":{"cna":{"title":"Cached redirect poisoning via X-Forwarded-Host header","descriptions":[{"lang":"en","value":"Ratpack is a toolkit for creating web applications. In versions prior to 1.9.0, a user supplied `X-Forwarded-Host` header can be used to perform cache poisoning of a cache fronting a Ratpack server if the cache key does not include the `X-Forwarded-Host` header as a cache key. Users are only vulnerable if they do not configure a custom `PublicAddress` instance. For versions prior to 1.9.0, by default, Ratpack utilizes an inferring version of `PublicAddress` which is vulnerable. This can be used to perform redirect cache poisoning where an attacker can force a cached redirect to redirect to their site instead of the intended redirect location. The vulnerability was patched in Ratpack 1.9.0. As a workaround, ensure that `ServerConfigBuilder::publicAddress` correctly configures the server in production."}],"affected":[{"vendor":"ratpack","product":"ratpack","versions":[{"version":"< 1.9.0","status":"affected"}]}],"references":[{"url":"https://portswigger.net/web-security/web-cache-poisoning","tags":["x_refsource_MISC"]},{"url":"https://github.com/ratpack/ratpack/security/advisories/GHSA-w6rq-6h34-vh7q","tags":["x_refsource_CONFIRM"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"LOW","baseScore":7,"baseSeverity":"HIGH","confidentialityImpact":"LOW","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:L","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-807","description":"CWE-807: Reliance on Untrusted Inputs in a Security Decision","lang":"en","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","dateUpdated":"2021-06-29T14:35:12.000Z","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa"},"source":{"advisory":"GHSA-w6rq-6h34-vh7q","discovery":"UNKNOWN"},"x_legacyV4Record":{"CVE_data_meta":{"ASSIGNER":"security-advisories@github.com","ID":"CVE-2021-29479","STATE":"PUBLIC","TITLE":"Cached redirect poisoning via X-Forwarded-Host header"},"affects":{"vendor":{"vendor_data":[{"product":{"product_data":[{"product_name":"ratpack","version":{"version_data":[{"version_value":"< 1.9.0"}]}}]},"vendor_name":"ratpack"}]}},"data_format":"MITRE","data_type":"CVE","data_version":"4.0","description":{"description_data":[{"lang":"eng","value":"Ratpack is a toolkit for creating web applications. In versions prior to 1.9.0, a user supplied `X-Forwarded-Host` header can be used to perform cache poisoning of a cache fronting a Ratpack server if the cache key does not include the `X-Forwarded-Host` header as a cache key. Users are only vulnerable if they do not configure a custom `PublicAddress` instance. For versions prior to 1.9.0, by default, Ratpack utilizes an inferring version of `PublicAddress` which is vulnerable. This can be used to perform redirect cache poisoning where an attacker can force a cached redirect to redirect to their site instead of the intended redirect location. The vulnerability was patched in Ratpack 1.9.0. As a workaround, ensure that `ServerConfigBuilder::publicAddress` correctly configures the server in production."}]},"impact":{"cvss":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"LOW","baseScore":7,"baseSeverity":"HIGH","confidentialityImpact":"LOW","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:L","version":"3.1"}},"problemtype":{"problemtype_data":[{"description":[{"lang":"eng","value":"CWE-807: Reliance on Untrusted Inputs in a Security Decision"}]}]},"references":{"reference_data":[{"name":"https://portswigger.net/web-security/web-cache-poisoning","refsource":"MISC","url":"https://portswigger.net/web-security/web-cache-poisoning"},{"name":"https://github.com/ratpack/ratpack/security/advisories/GHSA-w6rq-6h34-vh7q","refsource":"CONFIRM","url":"https://github.com/ratpack/ratpack/security/advisories/GHSA-w6rq-6h34-vh7q"}]},"source":{"advisory":"GHSA-w6rq-6h34-vh7q","discovery":"UNKNOWN"}}},"adp":[{"title":"CVE Program Container","references":[{"url":"https://portswigger.net/web-security/web-cache-poisoning","tags":["x_refsource_MISC","x_transferred"]},{"url":"https://github.com/ratpack/ratpack/security/advisories/GHSA-w6rq-6h34-vh7q","tags":["x_refsource_CONFIRM","x_transferred"]}],"providerMetadata":{"shortName":"CVE","orgId":"af854a3a-2127-422b-91ae-364da2661108","dateUpdated":"2024-08-03T22:11:05.264Z"}}]}}}