Critical Deserialization Vulnerability in Auth0 Symfony SDK
Summary
GHSA-98j6-67v3-mw34: Auth0 Symfony SDK Deserialization of Untrusted Data vulnerability. Affects auth0/symfony versions >= 5.0.0-BETA0, < 5.1.0. Fixed in 5.1.0. How to fix ↓
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Background
The Auth0 Symfony SDK is a library designed to facilitate the integration of Auth0 authentication services into Symfony applications. It provides developers with tools to manage user authentication, authorization, and session management seamlessly. However, the SDK has a critical vulnerability due to insecure deserialization of cookie data, which can be exploited by attackers to execute malicious payloads.
Vulnerability Detail
The vulnerability arises from the SDK's handling of cookie data without proper authentication checks. Attackers can craft a malicious cookie containing serialized data that, when processed by the SDK, can lead to unauthorized actions or data exposure. This issue is particularly severe as it allows for remote code execution and can compromise the integrity and security of the application.
How To Fix
Minimum fixed version
5.1.0
This is the first release that contains the fix.
composer require auth0/symfony:5.1.0Tip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
As a temporary workaround, consider implementing additional validation checks on cookie data before processing it. This can help mitigate the risk of processing malicious serialized data until the SDK is updated.
Conclusion
The Auth0 Symfony SDK has a critical vulnerability due to insecure deserialization of cookie data, which can be exploited by attackers. It is crucial for developers using affected versions to upgrade to the latest version to mitigate risks. Implementing additional validation checks can serve as a temporary measure until the upgrade is completed.
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FAQ
Versions between 5.0.0 BETA-0 to 5.0.0 are affected by this vulnerability.
If exploited, this vulnerability can lead to remote code execution, allowing attackers to manipulate application behavior or access sensitive data.
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Yes, upgrading to Auth0 Symfony SDK version 5.4.0 or higher will patch this vulnerability.
If immediate upgrading is not possible, implement additional validation checks on cookie data as a temporary workaround.
References
Related vulnerabilities
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