CVE-2018-1999005 : What You Need to Know
Learn about CVE-2018-1999005, a Jenkins vulnerability allowing attackers to execute JavaScript in other users' browsers. Find mitigation steps and long-term security practices here.
Jenkins versions 2.132 and earlier, as well as 2.121.1 and earlier, contain a cross-site scripting (XSS) vulnerability that allows attackers to execute JavaScript in the browser of another user.
Understanding CVE-2018-1999005
This CVE involves a security vulnerability in Jenkins that could be exploited by attackers with specific permissions to inject and execute malicious JavaScript code.
What is CVE-2018-1999005?
The vulnerability in Jenkins versions 2.132 and earlier, as well as 2.121.1 and earlier, allows attackers with Job/Configure permission to insert JavaScript code that will run in the browser of a different user when certain actions are performed in the user interface.
The Impact of CVE-2018-1999005
This vulnerability could lead to unauthorized execution of JavaScript in the context of another user's session, potentially compromising sensitive data or performing malicious actions on behalf of the targeted user.
Technical Details of CVE-2018-1999005
This section provides more in-depth technical insights into the vulnerability.
Vulnerability Description
The vulnerability exists in BuildTimelineWidget.java and BuildTimelineWidget/control.jelly files in affected Jenkins versions, enabling the injection of malicious JavaScript code.
Affected Systems and Versions
- Jenkins versions 2.132 and earlier
- Jenkins versions 2.121.1 and earlier
Exploitation Mechanism
Attackers with Job/Configure permission can exploit this vulnerability by inserting crafted JavaScript code that will be executed in the browser of another user when specific actions are performed.
Mitigation and Prevention
Protecting systems from CVE-2018-1999005 requires immediate actions and long-term security practices.
Immediate Steps to Take
- Upgrade Jenkins to a non-vulnerable version immediately.
- Restrict Job/Configure permissions to trusted users only.
- Monitor for any suspicious activities in Jenkins instances.
Long-Term Security Practices
- Regularly update Jenkins and all its plugins to the latest secure versions.
- Educate users on safe coding practices and the risks of XSS vulnerabilities.
Patching and Updates
- Apply security patches provided by Jenkins promptly to address this vulnerability and other potential security issues.