Description
Apache Commons Configuration uses a third-party library to parse YAML files which by default allows the instantiation of classes if the YAML includes special statements. Apache Commons Configuration versions 2.2, 2.3, 2.4, 2.5, 2.6 did not change the default settings of this library. So if a YAML file was loaded from an untrusted source, it could therefore load and execute code out of the control of the host application.
Remediation
References
https://lists.apache.org/thread.html/d0e00f2e147a9e9b13a6829133092f349b2882bf6860397368a52600%40%3Cannounce.tomcat.apache.org%3E
https://lists.apache.org/thread.html/r16a2e949e35780c8974cf66104e812410f3904f752df6b66bf292269%40%3Ccommits.servicecomb.apache.org%3E
https://lists.apache.org/thread.html/rde2186ad6ac0d6ed8d51af7509244adcf1ce0f9a3b7e1d1dd3b64676%40%3Ccommits.camel.apache.org%3E
https://www.oracle.com/security-alerts/cpuoct2020.html
Related Vulnerabilities
CVE-2021-39148 Vulnerability in maven package com.thoughtworks.xstream:xstream
CVE-2020-2202 Vulnerability in maven package org.jenkins-ci.plugins:fortify-on-demand-uploader
CVE-2016-10648 Vulnerability in npm package marionette-socket-host
CVE-2020-6458 Vulnerability in maven package org.webjars.npm:electron