XStream is a Java library to serialize objects to XML and back again. In XStream before version 1.4.16, there is a vulnerability which may allow a remote attacker to occupy a thread that consumes maximum CPU time and will never return. No user is affected, who followed the recommendation to setup XStream's security framework with a whitelist limited to the minimal required types. If you rely on XStream's default blacklist of the Security Framework, you will have to use at least version 1.4.16.
http://x-stream.github.io/changes.html#1.4.16
https://x-stream.github.io/security.html#workaround
https://github.com/x-stream/xstream/security/advisories/GHSA-56p8-3fh9-4cvq
https://x-stream.github.io/CVE-2021-21348.html
https://lists.debian.org/debian-lts-announce/2021/04/msg00002.html
https://lists.apache.org/thread.html/[email protected]%3Cdev.jmeter.apache.org%3E
https://lists.apache.org/thread.html/[email protected]%3Cusers.activemq.apache.org%3E
https://security.netapp.com/advisory/ntap-20210430-0002/
https://www.oracle.com//security-alerts/cpujul2021.html
https://www.oracle.com/security-alerts/cpuoct2021.html
Source: MITRE
Published: 2021-03-23
Updated: 2022-10-21
Type: CWE-400
Base Score: 7.8
Vector: AV:N/AC:L/Au:N/C:N/I:N/A:C
Impact Score: 6.9
Exploitability Score: 10
Severity: HIGH
Base Score: 7.5
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Impact Score: 3.6
Exploitability Score: 3.9
Severity: HIGH