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.Ak chcete pridať komentár, prihláste sa
Ostatné príspevky v tejto skupine
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. 🚨 Tod
Symfony 6.4.19 has just been released. Here is the list of the most important changes since 6.4.18:
bug #59198 [Messenger] Filter out non-consumable receivers when registering ConsumeMessagesComm
Symfony 7.2.4 has just been released. Here is the list of the most important changes since 7.2.3:
bug #59198 [Messenger] Filter out non-consumable receivers when registering ConsumeMessagesComman
SymfonyLive Paris 2025, conference in French language only, will already start in 1 month with the workshops! Have a look on the topics and join us! Schedule details are available here.
📣
A few weeks ago, I had the pleasure of announcing the formation of the Symfony UX Core Team, a dedicated group working to enhance the frontend development experience within the Symfony ecosystem. Toda
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
This week, development activity focused on new security features. The upcoming Symfony 7.3 version added support for security voters to explain their vote, improved the IsGranted attribute to allow us
