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osvGoogleOSV:CVE-2021-41267
HistoryNov 24, 2021 - 7:15 p.m.

CVE-2021-41267

2021-11-2419:15:07
Google
osv.dev
5

6.3 Medium

AI Score

Confidence

High

0.001 Low

EPSS

Percentile

39.3%

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.

6.3 Medium

AI Score

Confidence

High

0.001 Low

EPSS

Percentile

39.3%