CVE-2018-1999001 Explained : Impact and Mitigation
Learn about CVE-2018-1999001, a vulnerability in Jenkins versions 2.132 and earlier, allowing attackers to manipulate login credentials and potentially grant administrator access to anonymous users. Find mitigation steps and prevention measures here.
Jenkins versions 2.132 and earlier, as well as 2.121.1 and earlier, have a vulnerability in the User.java file that allows attackers to manipulate login credentials and move the config.xml file, potentially granting administrator access to anonymous users.
Understanding CVE-2018-1999001
This CVE involves an unauthorized modification of configuration vulnerability in Jenkins.
What is CVE-2018-1999001?
This vulnerability in Jenkins versions 2.132 and earlier allows attackers to provide crafted login credentials, leading Jenkins to move the config.xml file from the Jenkins home directory. If the config.xml file is missing upon Jenkins startup, it reverts to default settings, granting administrator access to anonymous users.
The Impact of CVE-2018-1999001
- Attackers can manipulate login credentials in Jenkins.
- Unauthorized access to administrator privileges may be granted to anonymous users.
Technical Details of CVE-2018-1999001
This section provides more technical insights into the vulnerability.
Vulnerability Description
The vulnerability lies in the User.java file of Jenkins, enabling attackers to move the config.xml file and potentially gain unauthorized access.
Affected Systems and Versions
- Jenkins versions 2.132 and earlier
- Jenkins versions 2.121.1 and earlier
Exploitation Mechanism
Attackers exploit this vulnerability by providing manipulated login credentials, triggering Jenkins to move critical files and grant unauthorized access.
Mitigation and Prevention
Protecting systems from this vulnerability requires immediate action and long-term security practices.
Immediate Steps to Take
- Update Jenkins to the latest version that includes a patch for this vulnerability.
- Monitor login activities for any suspicious behavior.
Long-Term Security Practices
- Implement strong password policies for Jenkins accounts.
- Regularly review and update Jenkins security configurations.
Patching and Updates
Ensure timely installation of security patches and updates for Jenkins to address this vulnerability.