Critical Deserialization Vulnerability in laravel-auth0 SDK
Summary
GHSA-c42h-56wx-h85q: laravel-auth0 SDK Deserialization of Untrusted Data vulnerability. Affects auth0/login versions >= 7.0.0-BETA1, < 7.2.2. Fixed in 7.2.2. How to fix ↓
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Background
The laravel-auth0 SDK is a package that integrates Auth0 authentication services into Laravel applications, providing features such as user authentication, session management, and security enhancements. This SDK is widely used for its ease of integration and robust security features. However, it is vulnerable to a critical deserialization issue that can be exploited by attackers.
Vulnerability Detail
The laravel-auth0 SDK contains a critical vulnerability due to insecure deserialization of cookie data. This vulnerability arises because the SDK processes cookie content without prior authentication. An attacker can exploit this by sending a specially crafted cookie containing malicious serialized data, potentially leading to unauthorized access or data manipulation within the application.
How To Fix
Minimum fixed version
7.2.2
This is the first release that contains the fix.
composer require auth0/login:7.2.2Tip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
As a temporary workaround, you can implement additional validation on cookie data before deserialization. However, this is not a substitute for upgrading to the patched version.
Conclusion
The laravel-auth0 SDK is vulnerable to a critical deserialization issue that can be exploited by attackers. It is essential to upgrade to the latest version to mitigate this risk. Regular monitoring and vulnerability management, such as using Vulert, can help keep your applications secure.
See every vulnerability recorded for auth0/login →
FAQ
Versions between 7.0.0-BETA1 and 7.2.1 are affected by this vulnerability.
If exploited, attackers could gain unauthorized access to user data or manipulate application behavior.
You can use Vulert's playground at Vulert Scanner to check if your application is affected by this vulnerability without needing to sign up.
While the best solution is to upgrade, you can implement additional validation on cookie data as a temporary measure.
The vulnerability was discovered by Andreas Forsblom, and Okta has acknowledged this finding.
References
Related vulnerabilities
Recent vulnerabilities recorded for auth0/login.
