GHSA-m884-279h-32v2
Exceptions displayed in non-debug configurations in Symfony
Packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| Packagist | symfony/error-handler | >= 4.4.0, < 4.4.4 | 4.4.4 |
| Packagist | symfony/error-handler | >= 5.0.0, < 5.0.4 | 5.0.4 |
| Packagist | symfony/symfony | >= 4.4.0, < 4.4.4 | 4.4.4 |
| Packagist | symfony/symfony | >= 5.0.0, < 5.0.4 | 5.0.4 |
Details
As written in the advisory (Markdown source, shown as plain text).
Description
-----------
When `ErrorHandler` renders an exception HTML page, it uses un-escaped properties from the related Exception class to render the stacktrace. The security issue comes from the fact that the stacktraces were also displayed in non-`debug` environments.
Resolution
----------
The `ErrorHandler` class now escapes all properties coming from the related Exception, and the stacktrace is not displayed anymore in non-`debug` environments.
The patches for this issue are available [here](https://github.com/symfony/symfony/commit/cf80224589ac05402d4f72f5ddf80900ec94d5ad) and [here](https://github.com/symfony/symfony/commit/629d21b800a15dc649fb0ae9ed7cd9211e7e45db) for branch 4.4.
Credits
-------
I would like to thank Luka Sikic for reporting & Yonel Ceruto and Jérémy Derussé for fixing the issue.
References
External links from the advisory. They lead to third-party sites.
- https://github.com/symfony/symfony/security/advisories/GHSA-m884-279h-32v2
- https://nvd.nist.gov/vuln/detail/CVE-2020-5274
- https://github.com/symfony/symfony/commit/629d21b800a15dc649fb0ae9ed7cd9211e7e45db
- https://github.com/symfony/symfony/commit/cf80224589ac05402d4f72f5ddf80900ec94d5ad
- https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/error-handler/CVE-2020-5274.yaml
- https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/symfony/CVE-2020-5274.yaml
- https://symfony.com/cve-2020-5274