CVE-2018-1999045 : What You Need to Know
Learn about CVE-2018-1999045 affecting Jenkins versions 2.137 and earlier, allowing attackers with a valid cookie to stay logged in despite security settings. Find mitigation steps here.
Jenkins versions 2.137 and earlier, as well as 2.121.2 and earlier, have a security flaw that allows attackers with a valid cookie to maintain a logged-in session, even if the feature to disable this is enabled.
Understanding CVE-2018-1999045
This CVE involves an improper authentication vulnerability in Jenkins.
What is CVE-2018-1999045?
This vulnerability in Jenkins versions 2.137 and earlier, as well as 2.121.2 and earlier, enables attackers with a valid cookie to stay logged in even if the feature to disable this is turned on.
The Impact of CVE-2018-1999045
- Attackers can maintain a logged-in session without proper authentication.
Technical Details of CVE-2018-1999045
This section provides more technical insights into the vulnerability.
Vulnerability Description
The security flaw exists in SecurityRealm.java and TokenBasedRememberMeServices2.java in affected Jenkins versions.
Affected Systems and Versions
- Jenkins versions 2.137 and earlier
- Jenkins versions 2.121.2 and earlier
Exploitation Mechanism
- Attackers need a valid cookie to exploit this vulnerability.
Mitigation and Prevention
Protect your systems from the CVE-2018-1999045 vulnerability with these steps:
Immediate Steps to Take
- Upgrade Jenkins to a non-vulnerable version.
- Monitor and revoke suspicious sessions.
Long-Term Security Practices
- Implement multi-factor authentication.
- Regularly review and update security configurations.
Patching and Updates
- Apply security patches promptly.