Werk #13902: Secure path for OMD hooks

Komponente Site management
Titel Secure path for OMD hooks
Datum 09.05.2022
Checkmk-Editon Checkmk Raw (CRE)
Checkmk-Version 2.2.0i1 2.1.0 2.0.0p25 1.6.0p29
Level Kleine Änderung
Klasse Sicherheitsfix
Kompatibilität Kompatibel - benötigt kein manuelles Eingreifen

OMD executes several hooks to determine configuration options (e.g. which port to use for the site apache). These hooks are version dependent, so OMD executed these hooks via a symlink in the site to get the hooks matching the version of the site.

The symlinks belong to the site user in order to be able to update the version. Since a OMD status executes those hooks as root, it was possible for a site user to create a malicious hook and execute code as root.

All maintained versions (>=1.6) are subject to this vulnerability. It is likely that also previous versions were vulnerable.

CVE is CVE-2022-31258. CVSS: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H 8.2

We thank Timo Klecker for reporting this issue!

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