Description
It is possible to inject malicious OGNL or MVEL scripts into the /context.json public endpoint. This was partially fixed in 1.5.1 but a new attack vector was found. In Apache Unomi version 1.5.2 scripts are now completely filtered from the input. It is highly recommended to upgrade to the latest available version of the 1.5.x release to fix this problem.
Remediation
References
http://unomi.apache.org./security/cve-2020-13942.txt
http://www.openwall.com/lists/oss-security/2020/11/24/5
https://advisory.checkmarx.net/advisory/CX-2020-4284
https://lists.apache.org/thread.html/r08a4057ff7196b8880117edaa4b6207cbd36ed692d8dd1f5a56b4d0f%40%3Cannounce.apache.org%3E
https://lists.apache.org/thread.html/r4a8fa91836687eaca42b5420a778ca8c8fd3a3740e4cf4401acc9118%40%3Cdev.unomi.apache.org%3E
https://lists.apache.org/thread.html/r4a8fa91836687eaca42b5420a778ca8c8fd3a3740e4cf4401acc9118%40%3Cusers.unomi.apache.org%3E
https://lists.apache.org/thread.html/r79672c25e0ef9bb4b9148376281200a8e61c6d5ef5bb705e9a363460%40%3Ccommits.unomi.apache.org%3E
https://lists.apache.org/thread.html/rcb6d2eafcf15def433aaddfa06738e5faa5060cef2647769e178999a%40%3Cdev.unomi.apache.org%3E
https://lists.apache.org/thread.html/rcb6d2eafcf15def433aaddfa06738e5faa5060cef2647769e178999a%40%3Cusers.unomi.apache.org%3E
Related Vulnerabilities
CVE-2021-30638 Vulnerability in maven package org.apache.tapestry:tapestry-core
CVE-2023-40828 Vulnerability in maven package org.pf4j:pf4j
CVE-2023-43123 Vulnerability in maven package org.apache.storm:storm-pmml-examples
CVE-2022-43402 Vulnerability in maven package org.jenkins-ci.plugins.workflow:workflow-cps
CVE-2020-2276 Vulnerability in maven package org.jenkins-ci.plugins:selection-tasks-plugin