Unauthorized Persistent Access in Ruby Devise Gem - CVE-2015-8314
Summary
CVE-2015-8314: The Devise gem before 3.5.4 for Ruby mishandles Remember Me cookies for sessions, which may allow an adversary to obtain unauthorized persistent application access. Affects ruby-devise versions < 3.5.6-2. Fixed in 3.5.6-2. How to fix ↓
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Background
The Ruby Devise gem is a flexible authentication solution for Rails applications, providing features such as user registration, password recovery, and session management. It is widely used in web applications to handle user authentication securely. However, prior to version 3.5.4, the gem had a vulnerability related to the handling of 'Remember Me' cookies, which could allow unauthorized access to applications.
Vulnerability Detail
CVE-2015-8314 is a vulnerability in the Ruby Devise gem that mishandles 'Remember Me' cookies for sessions. This flaw can be exploited by an adversary to gain unauthorized persistent access to applications that utilize this gem. The vulnerability arises from improper management of session cookies, which could lead to session fixation or hijacking, allowing attackers to impersonate legitimate users without their consent.
How To Fix
Minimum fixed version
3.5.6-2
This is the first release that contains the fix.
sudo apt-get install --only-upgrade ruby-deviseTip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
If immediate upgrading is not feasible, consider disabling the 'Remember Me' functionality in your application until the gem can be updated. This can be done by removing or commenting out the relevant code in your user session management logic.
Conclusion
CVE-2015-8314 represents a significant security risk for applications using the Ruby Devise gem prior to version 3.5.4. It is crucial for developers to upgrade to the fixed version to protect against unauthorized access. Utilizing tools like Vulert can help monitor and alert for such vulnerabilities in real-time.
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FAQ
CVE-2015-8314 is a vulnerability in the Ruby Devise gem that allows unauthorized persistent access due to mishandling of 'Remember Me' cookies.
You can use the Vulert playground at Vulert Scanner to check if your application is affected by this vulnerability without needing to sign up.
The risks include unauthorized access to user accounts, session hijacking, and potential data breaches, which can compromise user privacy and application integrity.
Yes, you can temporarily disable the 'Remember Me' feature in your application to mitigate the risk until an upgrade can be performed.
The CVSS score for CVE-2015-8314 is 7.5, indicating a high severity level.
References
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