CVE-2018-1000863 : Security Advisory and Response
Learn about CVE-2018-1000863 affecting Jenkins versions 2.153 and earlier, allowing attackers to disrupt user record storage formats, potentially locking users out of their accounts. Find mitigation steps and prevention measures.
Jenkins versions 2.153 and earlier, as well as LTS 2.138.3 and earlier, contain a vulnerability in User.java and IdStrategy.java that allows attackers to exploit customized usernames, leading to an inappropriate migration of user record storage formats and potential denial of access to Jenkins accounts.
Understanding CVE-2018-1000863
This CVE involves a data modification vulnerability in Jenkins that affects user record storage formats.
What is CVE-2018-1000863?
A vulnerability in Jenkins versions 2.153 and earlier, as well as LTS 2.138.3 and earlier, allows attackers to manipulate user names, causing improper migration of user record storage formats and potential login issues for victims.
The Impact of CVE-2018-1000863
Exploitation of this vulnerability can result in users being locked out of their Jenkins accounts due to the mishandling of user record storage formats.
Technical Details of CVE-2018-1000863
This section provides detailed technical information about the vulnerability.
Vulnerability Description
The vulnerability exists in User.java and IdStrategy.java in Jenkins versions 2.153 and earlier, LTS 2.138.3 and earlier, enabling attackers to disrupt user record storage formats through crafted usernames.
Affected Systems and Versions
- Jenkins versions 2.153 and earlier
- Jenkins LTS 2.138.3 and earlier
Exploitation Mechanism
Attackers can exploit this vulnerability by creating customized usernames, triggering an improper migration of user record storage formats and potentially preventing victims from accessing their Jenkins accounts.
Mitigation and Prevention
Protecting systems from CVE-2018-1000863 requires immediate actions and long-term security practices.
Immediate Steps to Take
- Update Jenkins to the latest patched version.
- Monitor user accounts for any suspicious activity.
- Implement strong password policies.
Long-Term Security Practices
- Regularly audit and review user permissions.
- Conduct security training for users on identifying phishing attempts.
Patching and Updates
- Apply security patches provided by Jenkins to address the vulnerability and prevent exploitation.