Vendor：http://totolink.net/
Firmware：https://www.totolink.net/home/menu/detail/menu_listtpl/download/id/259/ids/36.html
V2.0.0-B20230727.1043
sub_418F84 (handle function of formParentControl) of /bin/boa in firmware has multiple buffer overflow vulnerabilities.
Parameter "deviceName" is read from HTTP request into $v0_21, then copied to stack variable i_5. When "deviceName" has excessive length, this would result an stack buffer overflow.
Parameter "submit_url" is read from HTTP request into $s2_4
$s2_4 is used as 2nd parameter in sub_40bddc at 0x419a2c
arg2 is assigned to $s2, stack variable var_120 is constructed using sprintf. When arg2 has excessive length, this would result an stack buffer overflow.
I'm not able to provide full exploit for this vulnerability due to legal reasons.