CVE-2021-41267
Vulnerability from cvelistv5
Published
2021-11-24 18:55
Modified
2024-08-04 03:08
Severity ?
6.5 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
Summary
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.
References
security-advisories@github.comhttps://github.com/symfony/symfony/commit/95dcf51682029e89450aee86267e3d553aa7c487Patch, Third Party Advisory
security-advisories@github.comhttps://github.com/symfony/symfony/pull/44243Patch, Third Party Advisory
security-advisories@github.comhttps://github.com/symfony/symfony/releases/tag/v5.3.12Release Notes, Third Party Advisory
security-advisories@github.comhttps://github.com/symfony/symfony/security/advisories/GHSA-q3j3-w37x-hq2qPatch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://github.com/symfony/symfony/commit/95dcf51682029e89450aee86267e3d553aa7c487Patch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://github.com/symfony/symfony/pull/44243Patch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://github.com/symfony/symfony/releases/tag/v5.3.12Release Notes, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://github.com/symfony/symfony/security/advisories/GHSA-q3j3-w37x-hq2qPatch, Third Party Advisory
Impacted products
Vendor Product Version
symfony symfony Version: >= 5.2.0, < 5.3.12
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