{"id":"BIT-symfony-2021-41267","details":"Symfony/Http-Kernel is the HTTP kernel component for Symfony, a PHP framework for web and console applications and a set of reusable PHP components. Headers that are not part of the \"trusted_headers\" allowed list are ignored and protect users from \"Cache poisoning\" attacks. In Symfony 5.2, maintainers added support for the `X-Forwarded-Prefix` headers, but this header was accessible in SubRequest, even if it was not part of the \"trusted_headers\" allowed list. An attacker could leverage this opportunity to forge requests containing a `X-Forwarded-Prefix` header, leading to a web cache poisoning issue. Versions 5.3.12 and later have a patch to ensure that the `X-Forwarded-Prefix` header is not forwarded to subrequests when it is not trusted.","aliases":["CVE-2021-41267","GHSA-q3j3-w37x-hq2q"],"modified":"2024-03-06T11:25:28.861Z","published":"2024-03-06T11:07:55.104Z","database_specific":{"cpes":["cpe:2.3:a:sensiolabs:symfony:*:*:*:*:*:*:*:*"],"severity":"Medium"},"references":[{"type":"WEB","url":"https://github.com/symfony/symfony/commit/95dcf51682029e89450aee86267e3d553aa7c487"},{"type":"WEB","url":"https://github.com/symfony/symfony/pull/44243"},{"type":"WEB","url":"https://github.com/symfony/symfony/releases/tag/v5.3.12"},{"type":"WEB","url":"https://github.com/symfony/symfony/security/advisories/GHSA-q3j3-w37x-hq2q"}],"affected":[{"package":{"name":"symfony","ecosystem":"Bitnami","purl":"pkg:bitnami/symfony"},"ranges":[{"type":"SEMVER","events":[{"introduced":"5.2.0"},{"fixed":"5.3.12"}]}],"database_specific":{"source":"https://github.com/bitnami/vulndb/tree/main/data/symfony/BIT-symfony-2021-41267.json"},"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N"}]}],"schema_version":"1.7.3"}