Werk #16219: Limit length of Hostname

Component

Setup

Title

Limit length of Hostname

Date

Nov 10, 2023

Level

Trivial Change

Class

Security Fix

Compatibility

Compatible - no manual interaction needed

Checkmk versions & editions

2.3.0b1	Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk Cloud (CCE), Checkmk MSP (CME)
2.2.0p15	Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk Cloud (CCE), Checkmk MSP (CME)
2.1.0p37	Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk MSP (CME)

Prior to this Werk it was possible to create Hosts with arbitrary length. Since Checkmk stores information in files which paths contain the hostname these path could exceed the allowed length leading to various errors to an extend that rendered the usage of parts of the GUI useless.

We found this vulnerability internally.

Affected Versions: * 2.2.0 * 2.1.0 * 2.0.0

Vulnerability Management: We have rated the issue with a CVSS Score of 2.7 (Low) with the following CVSS vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:L. We assigned CVE-2023-23549 to this vulnerability.

Changes: This Werk adds a maximum length of 253 characters for the hostname.

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