GHSA-mmcv-fvq8-r9x3: Symfony XML decoding attack vector through external entities

May 30, 2024

The XMLEncoder component of Symfony 2.0.x fails to disable external entities when parsing XML. In the Symfony2 framework the XML class may be used to deserialize objects or as part of a client/server API. By using external entities it is possible to include arbitrary files from the file system.

References

github.com/FriendsOfPHP/security-advisories/blob/master/symfony/symfony/2012-02-24.yaml
github.com/advisories/GHSA-mmcv-fvq8-r9x3
github.com/symfony/symfony
github.com/symfony/symfony/commit/3e64d36cbdc34acaa82e0e6318112cd2eacb6fec
symfony.com/blog/security-release-symfony-2-0-11-released

Code Behaviors & Features

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