Tenda Router Credential Disclosure Scanner

Tenda routers are prevalent networking devices used in homes and small businesses for connecting multiple devices to the internet. These routers are favored for their affordability and user-friendly features, making them a popular choice among consumers. Tenda routers come with various models, each offering different features such as enhanced speed, security, or range. Users can configure these routers via a web-based interface, which requires handling sensitive configuration settings. Network administrators often rely on these routers to manage network access and maintain internet connectivity across various devices. As internet usage grows, ensuring the security of routers like Tenda becomes imperative to protect sensitive information and maintain data integrity.

The vulnerability detected by the scanner involves credential disclosure on Tenda routers. This issue allows unauthorized users to access sensitive information such as configuration files, which contain critical login credentials. The problem arises from inadequate access controls and authentication checks on specific router endpoints. As a result, attackers can exploit this weakness to gain unauthorized access to network settings. The detection scanner identifies the presence of this vulnerability, helping administrators to take corrective actions. Protection against such disclosures is essential to maintain the overall security posture of a network.

Technically, the endpoint /cgi-bin/DownloadCfg/RouterCfm.jpg on Tenda routers is vulnerable to unauthorized access, permitting the download of configuration files. These files potentially contain sensitive information such as usernames and device settings. The vulnerable parameter includes the actual request endpoint, without sufficient authentication checks, leading to a security gap. The scanner works by making a raw HTTP request to this endpoint and analyzing the response for specific indicators. Successful detection involves matching certain patterns within the response that indicate exposure of confidential data. Identifying these patterns is critical to ensuring prompt remediation and securing the router.

Exploiting this credential disclosure vulnerability can lead to severe consequences such as unauthorized network access, configuration alterations, data interception, and potential malware installs. Attackers gaining access to confidential settings can manipulate them to serve malicious purposes or lock out legitimate users. This can lead to significant disruptions in network services and compromise of sensitive data shared across the network. Preventing such outcomes requires prompt detection and mitigation techniques to patch the vulnerability and protect the network from unauthorized access. Since routers often act as the first line of defense against cyber threats, securing them against credential disclosures is imperative.

REFERENCES

• https://github.com/wy876/POC/blob/main/Tenda%E8%B7%AF%E7%94%B1%E5%99%A8%E8%B4%A6%E5%8F%B7%E5%AF%86%E7%A0%81%E6%B3%84%E9%9C%B2.md