Improper Authorization in loopback
Summary
GHSA-8wgc-jjvv-cv6v: Improper Authorization in loopback. Affects loopback across 2 version ranges.
< 2.40.0
>= 3.0.0, < 3.22.0
Fixed in 2.40.0 or 3.22.0, depending on the release line you run. How to fix ↓
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Background
Loopback is an open-source Node.js framework for building APIs and microservices. It provides a set of tools and conventions to quickly create robust and scalable applications. Loopback includes an AccessToken model that is used for authentication and authorization. However, vulnerable versions of loopback suffer from an Improper Authorization vulnerability, which allows attackers to create Authentication Tokens on behalf of other users. This can lead to unauthorized access to user data and privileges.
Vulnerability Detail
The vulnerability in loopback arises from the AccessToken model being publicly exposed. Attackers can exploit this by creating Authorization Tokens for any user if they know the target's userId. By doing so, they can gain access to the user's data and privileges, potentially leading to unauthorized actions and data breaches.
How To Fix
Fixed versions by release line
The minimum fixed version depends on the release line you run.
-
< 2.40.02.40.0npm install loopback@2.40.0 -
>= 3.0.0, < 3.22.03.22.0npm install loopback@3.22.0
Tip — Not sure which release line you're on? Vulert can find the fix for the version you are using. Scan free →
Workaround
There is no specific workaround mentioned for this vulnerability. It is advised to follow the recommended fix and upgrade to the patched versions of loopback.
Conclusion
The Improper Authorization vulnerability in loopback can lead to unauthorized access to user data and privileges. It is crucial to upgrade to the recommended versions to mitigate this vulnerability. For further support on vulnerability remediation, you can reach out to DevNack.com.
See every vulnerability recorded for loopback →
FAQ
Loopback is an open-source Node.js framework for building APIs and microservices. It provides a set of tools and conventions to quickly create robust and scalable applications.
The AccessToken model in loopback is used for authentication and authorization. It represents an access token that grants permissions to perform certain actions or access specific resources.
The Improper Authorization vulnerability in loopback occurs when the AccessToken model is publicly exposed. This allows attackers to create Authentication Tokens for any user by knowing their userId, leading to unauthorized access to user data and privileges.
The potential consequences of this vulnerability include unauthorized access to user data, privilege escalation, and potential data breaches. Attackers can exploit this vulnerability to perform actions on behalf of other users without their consent.
To fix this vulnerability, you should upgrade your loopback application to the recommended versions: 2.40.0 or later for loopback 2.x, and 3.22.0 or later for loopback 3.x. This will ensure that the Improper Authorization vulnerability is patched.
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