Werk #17112: ICMP Echo Request (Ping): Off-by-one error in active check

Component

Checks & agents

Title

ICMP Echo Request (Ping): Off-by-one error in active check

Date

Jun 26, 2024

Level

Trivial Change

Class

Bug Fix

Compatibility

Incompatible - Manual interaction might be required

Checkmk versions & editions

2.4.0b1	Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk Cloud (CCE), Checkmk MSP (CME)
2.3.0p8	Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk Cloud (CCE), Checkmk MSP (CME)

This fixes a regression in Checkmk version 2.3. When using the setting "Ping IP address identified by its index" of the plugin ICMP Echo Request (Ping), the used address was off by one.

The fix is incompatible for users that have accounted for this error and changed their rule.

To avoid mistakes in the future, we've added a hint to the rule, and validate that the configured index is equal to or larger than 1.

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