Werk #12835: Service label conditions could lead to wrong rule matches

Component Core & Setup
Title Service label conditions could lead to wrong rule matches
Date May 26, 2021
Checkmk Editon Checkmk Raw (CRE)
Checkmk Version 1.6.0p25 2.1.0i1 2.0.0p6
Level Prominent Change
Class Bug Fix
Compatibility Compatible - no manual interaction needed

The matching of service rule sets (which are used for a lot of different settings in Checkmk) could lead to wrong rule matching results in case service labels were used.

This issue was only triggered in a specific condition: Multiple services on different hosts on the same site with the same service description had to use the exact same set of label keys (the text before the ":") with different label values (the text after the ":").

In this case it could happen that the rule value of one service affected the rule value of another service. For example, this could lead to services being added to a service group which should not be added to that group.

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