Description
When a Symfony application is running behind a proxy or a load-balancer, you can tell Symfony to look for the X-Forwarded-* HTTP headers. HTTP headers that are not part of the "trusted_headers" allowed list are ignored and protect you from "Cache poisoning" attacks.
In Symfony 5.2, we've added support for the X-Forwarded-Prefix header, but this header was accessible in sub-requests, 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 HTTP header, leading to a web cache poisoning issue.
Resolution
Symfony now ensures that the X-Forwarded-Prefix HTTP header is not forwarded to sub-requests when it is not trusted.
The patch for this issue is available here for branch 5.3.
Credits
We would like to thank Soner Sayakci for reporting the issue and Jérémy Derussé for fixing the issue.
Sponsor the Symfony project.
Connectez-vous pour ajouter un commentaire
Autres messages de ce groupe
SymfonyLive Paris 2025, conference in French language only, will take place from March 27 to 28! The schedule is currently being revealed as we go along. More details are available here.
Al
SymfonyLive Berlin 2025, conference held in English, will take place from April 1 to 4! The full schedule is available here. Today, is the last day to enjoy tickets at "regular" price, enjoy i
This week, the upcoming Symfony 7.3 version improved the invokable command feature, deprecated the use of option arrays for configuring validation constraints, and updated the JsonEncoder component to
SymfonyLive Berlin 2025, conference held in English, will take place from April 1 to 4! The schedule is being revealed gradually. More details are available here.
As we are now unveiling th
SymfonyLive Paris 2025, conference in French language only, will take place from March 27 to 28! The schedule is currently being revealed as we go along. More details are available here.
Al
SymfonyLive Berlin 2025, conference held in English, will take place from April 1 to 4! The schedule is being revealed gradually. More details are available here.
First, a big thank you to
SymfonyLive Paris 2025, conference in French language only, will take place from March 27 to 28! The schedule is currently being revealed as we go along. More details are available here.
To