Tenda F3 Reflected Script Execution via Missing nosniff Header

Shenzhen Tenda F3 Wireless Router firmware V12.01.01.55_multi contains a content-type confusion vulnerability in the administrative interface. Responses omit the X-Content-Type-Options: nosniff header and include attacker-influenced content that can be reflected into the response body. Under affected browser behaviors, MIME sniffing may cause the response to be interpreted as active HTML, enabling script execution in the context of the administrative interface.

Tenda F3 CSRF in Web Management Interface

Shenzhen Tenda F3 Wireless Router firmware V12.01.01.55_multi contains a cross-site request forgery (CSRF) vulnerability in the web-based administrative interface. The interface does not implement anti-CSRF protections, allowing an attacker to induce an authenticated administrator to submit state-changing requests, which can result in unauthorized configuration changes.

Tenda F3 Plaintext Credential Exposure in Configuration Download

Shenzhen Tenda F3 Wireless Router firmware V12.01.01.55_multi contains a sensitive information exposure vulnerability in the configuration download functionality. The configuration download response includes the router password and administrative password in plaintext. The endpoint also omits appropriate Cache-Control directives, which can allow the response to be stored in client-side caches and recovered by other local users or processes with access to cached browser data.

Tenda F3 Clickjacking in Web Management Interface

Shenzhen Tenda F3 Wireless Router firmware V12.01.01.55_multi contains a clickjacking vulnerability in the web-based administrative interface. The interface does not set the X-Frame-Options header, allowing attacker-controlled sites to embed administrative pages in an iframe and trick an authenticated administrator into unintended interactions that may result in unauthorized configuration changes.

Tenda F3 V12.01.01.48_multi and after is vulnerable to Buffer Overflow via the portList parameter in /goform/setNAT.

Tenda F3 V12.01.01.48_multi and after is vulnerable to Buffer Overflow via the QosList parameter in goform/setQoS.

Tenda F3 V12.01.01.48_multi and after is vulnerable to Buffer Overflow. via the macFilterList parameter in goform/setNAT.

Tenda F3 V12.01.01.48_multi and after is vulnerable to Buffer Overflow via the onlineList parameter in goform/setParentControl.

Tenda F3 V12.01.01.48_multi and after is vulnerable to Buffer Overflow via the wifiTimeClose parameter in goform/setWifi.

Tenda N300 F3 12.01.01.48 devices allow remote attackers to obtain sensitive information (possibly including an http_passwd line) via a direct request for cgi-bin/DownloadCfg/RouterCfm.cfg, a related issue to CVE-2017-14942. NOTE: the vulnerability report may suggest that either a ? character must be placed after the RouterCfm.cfg filename, or that the HTTP request headers must be unusual, but it is not known why these are relevant to the device's HTTP response behavior.