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Sophos Mobile Control 3.5.0.3 Open Reverse Proxy

Sophos Mobile Control 3.5.0.3 Open Reverse Proxy
Posted Aug 5, 2016
Authored by Tim Kretschmann

Sophos EAS Proxy is part of the Enterprise Mobility Management (EMM) platform Sophos Mobile Control, which allows control of mail access for managed mobile devices. Anonymous attackers can access any web-resources of the backend mail system like Microsoft Exchange or IBM Domino, if Lotus Traveler option is enabled. Brute force attacks against users in the backend mail system are also possible. Version 3.5.0.3 is affected.

tags | exploit, web
advisories | CVE-2016-6597
MD5 | 24977ef9b66d45a0e285add435dd4ef1

Sophos Mobile Control 3.5.0.3 Open Reverse Proxy

Change Mirror Download
Application: Sophos Mobile Control EAS Proxy
Versions Affected: 3.5.0.3
Vendor URL: https://www.sophos.com/
Bugs: Open Reverse Proxy
Sent: 30.06.2016
Reported: 05.07.2016
Vendor response: 13.07.2016
Published BugFix by vendor: 28.07.2016
Date of Public Advisory: 05.08.2016
Reference: Sophos Case #6061906
Author: Tim Kretschmann (Pallas GmbH)
Version and State of report: 0.9 ? PrePublic


Description


1. ADVISORY INFORMATION

Title: Sophos Mobile Control EAS Proxy Open Reverse Proxy vulnerability
Risk: high
Advisory URL:
https://www.pallas.com/advisories/sophos_eas_open_reverse_proxy_vulnerability
Date published: 05.08.2016
Vendors contacted: Sophos


2. VULNERABILITY INFORMATION

Impact: access to any web-resources of the backend mail system, if Lotus
Traveler option is enabled
Remotely Exploitable: Yes
Locally Exploitable: No
CVE: CVE-2016-6597
CVSS Base Score v2: 8.6 / 10
CVSS Base Vector: 3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N


3. VULNERABILITY DESCRIPTION

Sophos EAS Proxy is part of the Enterprise Mobility Management (EMM)
platform Sophos Mobile Control, which allows control of mail access for
managed mobile devices.
Anonymous attackers can access any web-resources of the backend mail
system like Microsoft Exchange or IBM Domino, if Lotus Traveler option is
enabled. Brute force attacks against users in the backend mail system are
also possible.


4. VULNERABLE PACKAGES

Sophos Mobile Control EAS Proxy Version 3.5.0.3
Other versions are probably affected too, but they were not checked.


5. SOLUTIONS AND WORKAROUNDS

Solution: Update to ?Sophos Mobile Control EAS Proxy 6.2.0.exe?
Workaround: Disable Lotus Traveler Option if possible, limit access on
web-resources of backend mail system


6. AUTHOR

Tim Kretschmann (Pallas GmbH)


7. TECHNICAL DESCRIPTION

Proof of Concept for IBM Domino
https://<PublicIP_of_EASProxy>:<Port_of_EASProxy>/da.nsf
https://<PublicIP_of_EASProxy>:<Port_of_EASProxy>/dba4.nsf
https://<PublicIP_of_EASProxy>:<Port_of_EASProxy>/homepage.nsf


8. ABOUT Pallas GmbH

Pallas GmbH, located in Germany, provides managed and hosting services
with focus on Security.
Adress: Pallas GmbH, Hermuelheimer Str. 8a, 50321 Bruehl, GERMANY
Phone: 0049.2232.18960




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