CVE-2021-39150

A flaw was found in xstream, a simple library used to serialize objects to XML and back again. This flaw allows a remote attacker to request data from internal resources that are not publicly available by manipulating the processed input stream with Java runtime versions 14 to 8. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability.

Users who follow the recommended security framework with a whitelist to limit the types to the minimum required should not be affected. If you rely on XStream's default blacklist of the Security Framework ↗, you will have to use at least version 1.4.18.

OpenShift Container Platform (OCP) delivers the Jenkins LTS package with bundled XStream library. Due to JEP-200 [1] and JEP-228 [2] Jenkins projects, the OCP Jenkins package is not affected by this flaw. This version of the XStream library will be delivered in future Jenkins releases.

[1] https://github.com/jenkinsci/jep/blob/master/jep/200/README.adoc [2] https://github.com/jenkinsci/jep/blob/master/jep/228/README.adoc#security

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.