CVE-2018-1999042 : Vulnerability Insights and Analysis

Jenkins versions 2.137 and older, as well as 2.121.2 and older, have a security flaw in XStream2.java that allows attackers to manipulate Jenkins into resolving a domain name while deserializing an instance of java.net.URL.

Understanding CVE-2018-1999042

This CVE identifies a vulnerability in Jenkins that could be exploited by attackers to perform malicious actions.

What is CVE-2018-1999042?

CVE-2018-1999042 is a security flaw in Jenkins versions 2.137 and earlier, as well as 2.121.2 and earlier, related to the XStream2.java component.

The Impact of CVE-2018-1999042

The vulnerability enables attackers to manipulate Jenkins into resolving a domain name during the deserialization process of a java.net.URL instance, potentially leading to unauthorized actions.

Technical Details of CVE-2018-1999042

This section provides more in-depth technical information about the CVE.

Vulnerability Description

The flaw in XStream2.java in Jenkins versions 2.137 and older allows attackers to exploit the deserialization process to resolve domain names.

Affected Systems and Versions

Jenkins versions 2.137 and older
Jenkins versions 2.121.2 and older

Exploitation Mechanism

Attackers can exploit this vulnerability by manipulating the deserialization process of java.net.URL instances to trigger domain name resolution.

Mitigation and Prevention

Protecting systems from CVE-2018-1999042 requires immediate actions and long-term security practices.

Immediate Steps to Take

Update Jenkins to a patched version that addresses the vulnerability.
Monitor network traffic for any suspicious activities.

Long-Term Security Practices

Implement strict input validation to prevent malicious data injection.
Conduct regular security audits and penetration testing to identify vulnerabilities.

Patching and Updates

Apply security patches provided by Jenkins promptly to mitigate the risk of exploitation.