CVE-2021-36563

CVSS V2 Low 3.5 CVSS V3 Medium 5.4
Description
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.
Overview
  • CVE ID
  • CVE-2021-36563
  • Assigner
  • cve@mitre.org
  • Vulnerability Status
  • Analyzed
  • Published Version
  • 2021-07-26T18:15:08
  • Last Modified Date
  • 2021-09-16T13:21:57
CPE Configuration (Product)
CPE Vulnerable Operator Version Start Version End
cpe:2.3:a:checkmk:checkmk:*:*:*:*:*:*:*:* 1 OR 1.5.0 2.0.0
CVSS Version 2
  • Version
  • 2.0
  • Vector String
  • AV:N/AC:M/Au:S/C:N/I:P/A:N
  • Access Vector
  • NETWORK
  • Access Compatibility
  • MEDIUM
  • Authentication
  • SINGLE
  • Confidentiality Impact
  • NONE
  • Integrity Impact
  • PARTIAL
  • Availability Impact
  • NONE
  • Base Score
  • 3.5
  • Severity
  • LOW
  • Exploitability Score
  • 6.8
  • Impact Score
  • 2.9
CVSS Version 3
  • Version
  • 3.1
  • Vector String
  • CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
  • Attack Vector
  • NETWORK
  • Attack Compatibility
  • LOW
  • Privileges Required
  • LOW
  • User Interaction
  • REQUIRED
  • Scope
  • CHANGED
  • Confidentiality Impact
  • LOW
  • Availability Impact
  • NONE
  • Base Score
  • 5.4
  • Base Severity
  • MEDIUM
  • Exploitability Score
  • 2.3
  • Impact Score
  • 2.7
References
Reference URL Reference Tags
https://checkmk.com/de/werk/12762 Vendor Advisory
https://github.com/Edgarloyola/CVE-2021-36563 Exploit Third Party Advisory
https://checkmk.com/de/werk/13148 Vendor Advisory
History
Created Old Value New Value Data Type Notes
2022-05-10 16:05:03 Added to TrackCVE
2022-12-05 06:57:02 2021-07-26T18:15Z 2021-07-26T18:15:08 CVE Published Date updated
2022-12-05 06:57:02 2021-09-16T13:21:57 CVE Modified Date updated
2022-12-05 06:57:02 Analyzed Vulnerability Status updated