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
At Wide, Micropole’s digital agency, they help leading brands modernize their digital infrastructures while ensuring scalability, security, and performance. When Audi France approached them to migrate
Vente-unique.com, a leading European online retailer of furniture and home decor, operates in 11 countries, powered by a team of 400 professionals and serving more than 3 million customers. From 15 ye
This week, Symfony 6.4.23, 7.2.8 and 7.3.1 maintenance versions were released. Meanwhile, the upcoming Symfony 7.4 version continued adding new features such as better controller helpers, more precisi
Symfony 6.4.23 has just been released. Read the Symfony upgrade guide to learn more about upgrading Symfony and use the SymfonyInsight upgrade reports to detect the code you will need to change in you
Symfony 7.2.8 has just been released. Read the Symfony upgrade guide to learn more about upgrading Symfony and use the SymfonyInsight upgrade reports to detect the code you will need to change in your
Symfony 7.3.1 has just been released. Read the Symfony upgrade guide to learn more about upgrading Symfony and use the SymfonyInsight upgrade reports to detect the code you will need to change in your
This week, development activity was intense, with many bug fixes in the maintained branches, numerous deprecation removals in the 8.0 branch, and new features added to the 7.4 branch, including tighte
