Vulnerability Note VU#614751
Hughes satellite modems contain multiple vulnerabilities
Original Release date: 15 Feb 2017 | Last revised: 15 Feb 2017

Overview
Several models of Hughes high-performance broadband satellite modems are potentially vulnerable to several issues if not appropriately configured.

Description
Several models of Hughes high-performance broadband satellite modems are potentially vulnerable to the following issues if not appropriately configured:
CWE-20: Improper Input Validation – CVE-2016-9494

The device’s advanced status web page that is linked to from the basic status web page does not appear to properly parse malformed GET requests.

This may lead to a denial of service.

CWE-798: Use of Hard-coded Credentials – CVE-2016-9495

Access to the device’s default telnet port (23) using one of a few default credentials shared among all devices.

CWE-306: Missing Authentication for Critical Function – CVE-2016-9496

An unauthenticated user may send an HTTP GET request to http://[ip]/com/gatewayreset or http://[ip]/cgi/reboot.bin to cause the modem to reboot.

CWE-288: Authentication Bypass Using an Alternate Path or Channel – CVE-2016-9497

By default, port 1953 is accessible via telnet and does not require authentication.

An unauthenticated remote user can access many administrative commands via this interface, including rebooting the modem.

According to the reporter, the following models may be affected:

HN7740S
DW7000
HN7000S/SM

Other models may also be affected.

Impact
An unauthenticated remote attacker may be able to cause a denial of service via one of several methods, or can access some administrative commands via telnet.

Solution
Hughes has provided the following statement:

"The Hughes system has the ability to configure the modem which will prevent access and exploitation of the listed potential vulnerabilities. Hughes has provided service providers with documentation on the parameters and current software versions required to address these potential vulnerabilities.

Customers should contact their service provider to ensure the locked down configuration is pushed to their devices."

Update the firmware

DW7000, HN7740S, and HN7000S/SM devices running software versions prior to 6.9.0.34 are vulnerable.

Devices running 6.9.0.34 or higher can be configured to prevent exploit of the listed potential vulnerabilities.
Restrict network access

Restrict network access to the Hughes modem and devices on its local network that use open protocols like HTTP.

Vendor Information (Learn More)

VendorStatusDate NotifiedDate UpdatedHughes Network Systems, Inc.Affected16 Mar 201615 Feb 2017If you are a vendor and your product is affected, let
us know.

CVSS Metrics (Learn More)

Group
Score
Vector

Base
7.3
AV:A/AC:L/Au:N/C:P/I:P/A:C

Temporal
6.2
E:POC/RL:W/RC:C

Environmental
4.7
CDP:ND/TD:M/CR:ND/IR:ND/AR:ND

References

None

Credit

Thanks to the reporter who wishes to remain anonymous.
This document was written by Garret Wassermann.

Other Information

CVE IDs:
CVE-2016-9494
CVE-2016-9495
CVE-2016-9496
CVE-2016-9497

Date Public:
15 Feb 2017

Date First Published:
15 Feb 2017

Date Last Updated:
15 Feb 2017

Document Revision:
52

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