Authentication Bypass in Apache Shiro: CVE-2020-1957
Summary
CVE-2020-1957: Apache Shiro before 1.5.2, when using Apache Shiro with Spring dynamic controllers, a specially crafted request may cause an authentication bypass. Affects shiro across 2 version ranges.
< 1.3.2-4+deb11u1
< d1653b888509e1c2b280b5fd8f15dfcf8d8da56f
Fixed in 1.3.2-4+deb11u1. How to fix ↓
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Background
Apache Shiro is a powerful and flexible open-source security framework that enables developers to secure applications with ease. It provides features such as authentication, authorization, cryptography, and session management. However, prior to version 1.5.2, Shiro was found to have a vulnerability when used with Spring dynamic controllers, which could lead to an authentication bypass, compromising the security of applications relying on this framework.
Vulnerability Detail
CVE-2020-1957 is a vulnerability in Apache Shiro that allows an attacker to bypass authentication mechanisms through specially crafted requests. This issue arises when Shiro is integrated with Spring dynamic controllers, where improper handling of requests can lead to unauthorized access. The potential ramifications include unauthorized access to sensitive data and functionalities, which could severely impact the integrity and confidentiality of the application. The vulnerability has a CVSS score of 9.8, indicating a critical level of severity.
How To Fix
Minimum fixed version
1.3.2-4+deb11u1
This is the first release that contains the fix.
sudo apt-get install --only-upgrade shiroTip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
If immediate upgrading is not feasible, consider implementing additional security measures such as input validation and request filtering to mitigate the risk of authentication bypass. However, these are temporary solutions and should not replace the need for an upgrade.
Conclusion
CVE-2020-1957 represents a significant security risk for applications using Apache Shiro prior to version 1.5.2. It is crucial for developers to upgrade to the latest version to protect against potential authentication bypass attacks. Utilizing tools like Vulert can further enhance security by monitoring for vulnerabilities in real-time.
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FAQ
CVE-2020-1957 is a vulnerability in Apache Shiro that allows for authentication bypass when used with Spring dynamic controllers.
Exploitation of this vulnerability can lead to unauthorized access to sensitive data and functionalities within applications using Apache Shiro.
You can use Vulert's playground at Vulert Scanner to check if your application is affected by this vulnerability without any signup.
It is recommended to upgrade to Apache Shiro version 1.5.2 or later to mitigate this vulnerability.
Vulert is a service that monitors and alerts for open-source vulnerabilities in software using just a manifest file like package-lock.json, providing real-time insights.
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