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CVE-2021-21674 : Exploit Details and Defense Strategies

Learn about CVE-2021-21674, a vulnerability in Jenkins requests-plugin Plugin allowing attackers with Overall/Read permission to view pending requests. Find out the impact, technical details, affected systems, and mitigation steps.

A missing permission check in Jenkins requests-plugin Plugin 2.2.6 and earlier allows attackers with Overall/Read permission to view the list of pending requests.

Understanding CVE-2021-21674

This CVE identifies a vulnerability in Jenkins requests-plugin Plugin version 2.2.6 and below that could be exploited by users with Overall/Read permission to access pending requests.

What is CVE-2021-21674?

The CVE-2021-21674 highlights a missing permission validation issue in Jenkins requests-plugin Plugin, enabling unauthorized users to view pending requests without proper authorization.

The Impact of CVE-2021-21674

The vulnerability poses a risk as it allows malicious users with specific permissions to access sensitive information about pending requests, potentially leading to data breaches or unauthorized actions.

Technical Details of CVE-2021-21674

This section covers detailed technical information about the CVE.

Vulnerability Description

The vulnerability arises from a lack of proper permission checks in Jenkins requests-plugin Plugin version 2.2.6 and earlier, enabling users with Overall/Read permission to view the list of pending requests.

Affected Systems and Versions

The vulnerability affects Jenkins requests-plugin Plugin with versions less than or equal to 2.2.6.

Exploitation Mechanism

Attackers with Overall/Read permission within Jenkins can exploit this vulnerability to gain access to pending requests, even if they do not have explicit permission.

Mitigation and Prevention

To address and prevent the exploitation of CVE-2021-21674, the following steps can be taken:

Immediate Steps to Take

        Upgrade Jenkins requests-plugin Plugin to a version beyond 2.2.6 to mitigate the vulnerability.

Long-Term Security Practices

Enforce the principle of least privilege to ensure users only have necessary permissions to perform their tasks within the Jenkins environment.

Patching and Updates

Regularly update and monitor Jenkins requests-plugin Plugin to ensure that known vulnerabilities are patched and security measures are up to date.

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