CVE-2020-2123 : Security Advisory and Response

Jenkins RadarGun Plugin 1.7 and earlier versions are vulnerable to remote code execution due to a YAML parser misconfiguration.

Understanding CVE-2020-2123

Jenkins RadarGun Plugin versions 1.7 and below are susceptible to a critical security flaw that allows for remote code execution.

What is CVE-2020-2123?

This CVE refers to a vulnerability in Jenkins RadarGun Plugin versions 1.7 and earlier, where the YAML parser is not properly configured, enabling the execution of arbitrary code remotely.

The Impact of CVE-2020-2123

The vulnerability can be exploited by attackers to execute malicious code remotely, potentially leading to unauthorized access, data breaches, and system compromise.

Technical Details of CVE-2020-2123

Jenkins RadarGun Plugin's security issue is detailed below:

Vulnerability Description

The vulnerability arises from the plugin's failure to secure its YAML parser, allowing the instantiation of arbitrary types and facilitating remote code execution.

Affected Systems and Versions

Product: Jenkins RadarGun Plugin
Vendor: Jenkins project
Versions Affected: 1.7 and earlier
Version Type: Custom

Exploitation Mechanism

The vulnerability can be exploited remotely by crafting malicious YAML payloads to trigger the execution of unauthorized code on the target system.

Mitigation and Prevention

To address CVE-2020-2123, follow these steps:

Immediate Steps to Take

Update Jenkins RadarGun Plugin to a patched version that addresses the YAML parser vulnerability.
Monitor for any suspicious activities on the Jenkins platform.

Long-Term Security Practices

Regularly update all Jenkins plugins and software components to mitigate potential security risks.
Implement network segmentation and access controls to limit the impact of successful attacks.

Patching and Updates

Apply security patches promptly to Jenkins RadarGun Plugin and other software to prevent exploitation of known vulnerabilities.