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CVE-2021-40906

Published: 25 March 2022

CheckMK Raw Edition software (versions 1.5.0 to 1.6.0) does not sanitise the input of a web service parameter that is in an unauthenticated zone. This Reflected XSS allows an attacker to open a backdoor on the device with HTML content and interpreted by the browser (such as JavaScript or other client-side scripts) or to steal the session cookies of a user who has previously authenticated via a man in the middle. Successful exploitation requires access to the web service resource without authentication.

Notes

AuthorNote
0xnishit
fix 1.6.0p26: https://github.com/tribe29/checkmk/commit/6b89403e47b541f96ac2b2c5953360a039a1fc71

Priority

Medium

Cvss 3 Severity Score

6.1

Score breakdown

Status

Package Release Status
check-mk
Launchpad, Ubuntu, Debian
focal Does not exist

jammy Does not exist

bionic
Released (1.2.8p16-1ubuntu0.2)
trusty Ignored
(end of standard support)
upstream
Released (1.6.0p26)
xenial Not vulnerable
(code not present)

Severity score breakdown

Parameter Value
Base score 6.1
Attack vector Network
Attack complexity Low
Privileges required None
User interaction Required
Scope Changed
Confidentiality Low
Integrity impact Low
Availability impact None
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N