GoogleOSV:GHSA-M884-279H-32V2Exceptions displayed in non-debug configurations in Symfony
0.001 Low
EPSS
Percentile
24.2%
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 and here for branch 4.4.
Credits
I would like to thank Luka Sikic for reporting & Yonel Ceruto and Jérémy Derussé for fixing the issue.
References
github.com/FriendsOfPHP/security-advisories/blob/master/symfony/error-handler/CVE-2020-5274.yaml
github.com/FriendsOfPHP/security-advisories/blob/master/symfony/symfony/CVE-2020-5274.yaml
github.com/symfony/symfony/commit/629d21b800a15dc649fb0ae9ed7cd9211e7e45db
github.com/symfony/symfony/commit/cf80224589ac05402d4f72f5ddf80900ec94d5ad
github.com/symfony/symfony/security/advisories/GHSA-m884-279h-32v2
nvd.nist.gov/vuln/detail/CVE-2020-5274
symfony.com/cve-2020-5274
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