Prometheus - Open Redirect

id: CVE-2021-29622

info:
  name: Prometheus - Open Redirect
  author: geeknik
  severity: medium
  description: Prometheus 2.23.0 through 2.26.0 and 2.27.0 contains an open redirect vulnerability. To ensure a seamless transition to 2.27.0, the default UI was changed to the new UI with a URL prefixed by /new redirect to /. Due to a bug in the code, an attacker can redirect a user to a malicious site and possibly obtain sensitive information, modify data, and/or execute unauthorized operations.
  impact: |
    An attacker can exploit this vulnerability to redirect users to malicious websites, leading to potential phishing attacks or the disclosure of sensitive information.
  remediation: The issue was patched in the 2.26.1 and 2.27.1 releases. In 2.28.0, the /new endpoint will be removed completely. The workaround is to disable access to /new via a reverse proxy in front of Prometheus.
  reference:
    - https://github.com/prometheus/prometheus/security/advisories/GHSA-vx57-7f4q-fpc7
    - https://github.com/prometheus/prometheus/releases/tag/v2.26.1
    - https://github.com/prometheus/prometheus/releases/tag/v2.27.1
    - https://nvd.nist.gov/vuln/detail/CVE-2021-29622
    - https://github.com/d4n-sec/d4n-sec.github.io
  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-2021-29622
    cwe-id: CWE-601
    epss-score: 0.1956
    epss-percentile: 0.97107
    cpe: cpe:2.3:a:prometheus:prometheus:*:*:*:*:*:*:*:*
  metadata:
    max-request: 1
    vendor: prometheus
    product: prometheus
  tags: cve2021,cve,prometheus,redirect,vuln

http:
  - method: GET
    path:
      - "{{BaseURL}}/new/newhttp://interact.sh"

    matchers:
      - type: regex
        part: header
        regex:
          - '(?m)^(?:Location\s*?:\s*?)(?:https?://|//)?(?:[a-zA-Z0-9\-_\.@]*)interact\.sh.*$'
# digest: 4a0a00473045022053d68ec4ed49d850d16a353a803a3240780fbc12205a0d84d302fa4841a3b340022100f9a084b960435cccc578272134dcbb73ef8885cf5127588ae06eaafbe893ac8a:922c64590222798bb761d5b6d8e72950