Branch: refs/heads/master Home: https://github.com/tribe29/checkmk Commit: 2e8cf315be262df7a749c55f205ff21f895a84db https://github.com/tribe29/checkmk/commit/2e8cf315be262df7a749c55f205ff21f8… Author: Hannes Rantzsch &lt;hannes.rantzsch(a)tribe29.com&gt; Date: 2022-09-01 (Thu, 01 Sep 2022) Changed paths: A .werks/14384 M livestatus/api/python/livestatus.py M tests/unit/livestatus/test_livestatus_unit.py Log Message: ----------- 14384 SEC Fix command injection in livestatus query headers Prior to this Werk it was possible to inject livestatus commands in Checkmk's livestatus wrapper and python API. Attackers could add additional commands in the AuthUser query header using newline characters. This allowed running arbitrary livestatus commands, including external commands to the core. The issue could only be exploited by attackers from localhost, where the tampered header could be injected in a request to graph data. We thank Stefan Schiller (SonarSource) for reporting this issue. <b>Affected Versions</b>: All currently supported versions are affected: 1.6, 2.0, and 2.1. <b>Mitigations</b>: Immediate mitigations are not available. <b>Indicators of Compromise</b>: Review the logs of Nagios / CMC for suspicious commands. <b>Vulnerability Management</b>: We have rated the issue with a CVSS Score of 6.8 (Medium) with the following CVSS vector: <tt>CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:L</tt>. A CVE has been requested. <b>Changes</b>: This Werk adds sanitization for the AuthUser header field. CMK-11203 Change-Id: Ie34b324ab57e84df03fd0ecbf54d22804d101723