http://git.mathias-kettner.de/git/?p=check_mk.git;a=blob;f=.werks/4757;hb=c248f0b6ff7b15ced9f07a3df8a80fad656ea5b1

https://www.tenable.com/security/research/tra-2017-21

The remote Ubuntu 18.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-5527-1 advisory.

  - A cross site scripting (XSS) vulnerability exists in Check_MK versions 1.4.0x prior to 1.4.0p6, allowing     an unauthenticated remote attacker to inject arbitrary HTML or JavaScript via the _username parameter when     attempting authentication to webapi.py, which is returned unencoded with content type text/html.
    (CVE-2017-9781)

  - Check_MK before 1.2.8p26 mishandles certain errors within the failed-login save feature because of a race     condition, which allows remote attackers to obtain sensitive user information by reading a GUI crash     report. (CVE-2017-14955)

  - The CheckMK management web console (versions 1.5.0 to 2.0.0) does not sanitise user input in various     parameters of the WATO module. This 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), the XSS payload will be     triggered when the user accesses some specific sections of the application. In the same sense a very     dangerous potential way would be when an attacker who has the monitor role (not administrator) manages to     get a stored XSS to steal the secretAutomation (for the use of the API in administrator mode) and thus be     able to create another administrator user who has high privileges on the CheckMK monitoring web console.
    Another way is that persistent XSS allows an attacker to modify the displayed content or change the     victim's information. Successful exploitation requires access to the web management interface, either with     valid credentials or with a hijacked session. (CVE-2021-36563)

  - 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.
    (CVE-2021-40906)

  - Checkmk <=2.0.0p19 Fixed in 2.0.0p20 and Checkmk <=1.6.0p27 Fixed in 1.6.0p28 are affected by a Cross Site     Scripting (XSS) vulnerability. The Alias of a site was not properly escaped when shown as condition for     notifications. (CVE-2022-24565)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The version of Check_MK running on the remote web server is prior to 1.4.0p6. It is, therefore, affected by a reflected cross-site (XSS) scripting vulnerability in webapi.py due to error messages being interpreted as HTML when they should be plain text. An unauthenticated, remote attacker can exploit this to execute arbitrary script code in a user's browser session.

ID	Name	Product	Family	Severity
163287	Ubuntu 18.04 LTS : Checkmk vulnerabilities (USN-5527-1)	Nessus	Ubuntu Local Security Checks	medium
101089	Check_MK < 1.4.0p6 webapi.py XSS	Nessus	CGI abuses : XSS	medium

CVE-2017-9781

medium

Tenable Plugins

medium

medium