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CVE-2021-21246 Explained : Impact and Mitigation

Learn about CVE-2021-21246 in OneDev, a vulnerability that allows unauthorized access to sensitive data, potential vulnerabilities, impact, and mitigation steps.

OneDev is an all-in-one DevOps platform that had a security vulnerability in versions prior to 4.0.3. This vulnerability, identified as CVE-2021-21246, allowed unauthorized users to retrieve sensitive data, including access tokens, leading to a potential data leak.

Understanding CVE-2021-21246

This section delves into the details of the CVE-2021-21246 vulnerability in OneDev.

What is CVE-2021-21246?

The CVE-2021-21246 vulnerability in OneDev allowed unauthorized users to access sensitive information, such as access tokens, leading to a potential data leak.

The Impact of CVE-2021-21246

The impact of CVE-2021-21246 was significant, as it could potentially lead to a sensitive data leak, allowing malicious actors to impersonate administrators or other users.

Technical Details of CVE-2021-21246

Let's analyze the technical aspects of the CVE-2021-21246 vulnerability in OneDev.

Vulnerability Description

In OneDev versions prior to 4.0.3, the REST UserResource endpoint lacked security checks, enabling unauthorized users to retrieve sensitive information, including access tokens.

Affected Systems and Versions

The vulnerability impacted OneDev versions earlier than 4.0.3.

Exploitation Mechanism

By exploiting the

/users/{id}
endpoint, unauthorized users could retrieve sensitive user details and access tokens, potentially leading to data leakage.

Mitigation and Prevention

To address and prevent the CVE-2021-21246 vulnerability, certain steps need to be taken.

Immediate Steps to Take

Users are advised to update their OneDev instances to version 4.0.3 or later to mitigate the vulnerability.

Long-Term Security Practices

Implement strict access controls and regular security audits to prevent similar vulnerabilities in the future.

Patching and Updates

Regularly update OneDev to the latest version and stay informed about security patches and updates.

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