Werk #15110: Crash upon empty result of piggyback hostname translation

Component

Checks & agents

Title

Crash upon empty result of piggyback hostname translation

Date

Jan 17, 2023

Level

Trivial Change

Class

Bug Fix

Compatibility

Compatible - no manual interaction needed

Checkmk versions & editions

2.2.0b1	Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk Cloud (CCE), Checkmk MSP (CME)
2.1.0p20	Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk MSP (CME)

From Checkmk version 2.1 the Check_MK service crashed if the settings in Hostname translation for piggybacked hosts resulted in an empty host name.

The host name '' is now replaced by '_'. This is consistent with other invalid host names (such as '../../bin/pwn'), where the invalid characters are replaced by an underscore.

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