CVE-2020-2160 : What You Need to Know

Jenkins 2.227 and earlier, LTS 2.204.5 and earlier are affected by a vulnerability that allows attackers to bypass CSRF protection.

Understanding CVE-2020-2160

Jenkins versions prior to 2.227 and LTS versions prior to 2.204.5 are susceptible to a security issue that enables attackers to manipulate URLs to bypass CSRF protection.

What is CVE-2020-2160?

This CVE describes a flaw in Jenkins versions 2.227 and earlier, LTS 2.204.5 and earlier, where different representations of request URL paths can be exploited by attackers to craft URLs, allowing them to bypass CSRF protection on any target URL.

The Impact of CVE-2020-2160

The vulnerability in Jenkins could potentially lead to unauthorized access and security breaches as attackers can circumvent CSRF protection mechanisms.

Technical Details of CVE-2020-2160

Jenkins versions 2.227 and earlier, LTS 2.204.5 and earlier are affected by this vulnerability.

Vulnerability Description

The issue arises from the use of different representations of request URL paths in Jenkins, enabling attackers to create URLs that can bypass CSRF protection.

Affected Systems and Versions

Jenkins versions <= 2.227
LTS versions <= 2.204.5

Exploitation Mechanism

Attackers can exploit the vulnerability by manipulating URLs to bypass CSRF protection on any target URL.

Mitigation and Prevention

It is crucial to take immediate steps to address and prevent exploitation of this vulnerability.

Immediate Steps to Take

Update Jenkins to a version that includes a fix for this vulnerability.
Monitor and restrict network access to Jenkins to prevent unauthorized exploitation.

Long-Term Security Practices

Regularly update Jenkins and apply security patches promptly.
Implement strong access controls and authentication mechanisms to enhance security.

Patching and Updates

Ensure that Jenkins is regularly updated to the latest secure versions to mitigate the risk of exploitation.