CVE-2021-41267, GHSA-q3j3-w37x-hq2q
packagist/symfony/symfony
Inconsistent Interpretation of HTTP Requests ('HTTP Request Smuggling')
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, 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.
All versions starting from 5.2.0 before 5.3.12
Upgrade to version 5.3.12 or above.
2021-12-01
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