CVE-2020-2166 Explained : Impact and Mitigation

Jenkins Pipeline: AWS Steps Plugin 1.40 and earlier versions are affected by a remote code execution vulnerability due to improper configuration of the YAML parser.

Understanding CVE-2020-2166

This CVE affects Jenkins Pipeline: AWS Steps Plugin versions 1.40 and below, allowing for potential remote code execution.

What is CVE-2020-2166?

CVE-2020-2166 is a vulnerability in Jenkins Pipeline: AWS Steps Plugin versions 1.40 and earlier, where the YAML parser is not properly configured, enabling the instantiation of arbitrary types, leading to a remote code execution risk.

The Impact of CVE-2020-2166

The vulnerability poses a significant risk as attackers can exploit it to execute arbitrary code remotely, potentially compromising the affected systems and data.

Technical Details of CVE-2020-2166

Jenkins Pipeline: AWS Steps Plugin 1.40 and earlier versions are susceptible to remote code execution due to a YAML parser misconfiguration.

Vulnerability Description

The vulnerability arises from the plugin's failure to secure the YAML parser, allowing the instantiation of arbitrary types, which can be exploited for remote code execution.

Affected Systems and Versions

Product: Jenkins Pipeline: AWS Steps Plugin
Vendor: Jenkins project
Versions Affected: <= 1.40

Exploitation Mechanism

Attackers can exploit this vulnerability by crafting malicious YAML payloads that, when processed by the plugin, lead to the execution of unauthorized code on the target system.

Mitigation and Prevention

To address CVE-2020-2166 and enhance system security, follow these mitigation steps:

Immediate Steps to Take

Update Jenkins Pipeline: AWS Steps Plugin to a patched version that addresses the vulnerability.
Monitor for any suspicious activities on the Jenkins server.

Long-Term Security Practices

Regularly update all Jenkins plugins and software components to the latest secure versions.
Implement network segmentation and access controls to limit the plugin's exposure to potential attackers.

Patching and Updates

Apply security patches and updates provided by Jenkins project promptly to mitigate the vulnerability and enhance system security.