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USN-5527-1: Checkmk vulnerabilities

20 July 2022

Several security issues were fixed in Checkmk.



  • check-mk - general purpose monitoring plugin for retrieving data


It was discovered that Checkmk incorrectly handled authentication. An attacker
could possibly use this issue to cause a race condition leading to information
disclosure. (CVE-2017-14955)

It was discovered that Checkmk incorrectly handled certain inputs. An attacker
could use these cross-site scripting issues to inject arbitrary html or
javascript code to obtain sensitive information including user information,
session cookies and valid credentials. (CVE-2017-9781, CVE-2021-36563,
CVE-2021-40906, CVE-2022-24565)

Update instructions

The problem can be corrected by updating your system to the following package versions:

Ubuntu 18.04

In general, a standard system update will make all the necessary changes.