Advisory Weakness Curation

XStream can cause a Denial of Service. ### Impact The vulnerability may allow a remote attacker to allocate 100% CPU time on the target system depending on CPU type or parallel execution of such a payload resulting in a denial of service only by manipulating the processed input stream. No user is affected, who followed the recommendation to setup XStream's security framework with a whitelist limited to the minimal required types. ### Patches If you rely on XStream's default blacklist of the Security Framework https://x-stream.github.io/security.html#framework, you will have to use at least version 1.4.16. ### Workarounds See workarounds https://x-stream.github.io/security.html#workaround for the different versions covering all CVEs. ### References See full information about the nature of the vulnerability and the steps to reproduce it in XStream's documentation for CVE-2021-21341 https://x-stream.github.io/CVE-2021-21341.html. ### Credits The vulnerability was discovered and reported by threedr3am. ### For more information If you have any questions or comments about this advisory: * Open an issue in XStream https://github.com/x-stream/xstream/issues * Contact us at XStream Google Group https://groups.google.com/group/xstream-user

Uncontrolled Resource Consumption XStream is a Java library to serialize objects to XML and back again. If you rely on XStream's default denylist of the Security Framework, you will have to use at least