AVer Information EH6108H+ hybrid DVR contains multiple vulnerabilities

Overview

AVer Information EH6108H+ hybrid DVR, version X9.03.24.00.07l and possibly earlier, reportedly contains multiple vulnerabilities, including undocumented privileged accounts, authentication bypass, and information exposure.

Description

AVer Information EH6108H+ hybrid DVR is an IP security camera management system and streaming video recorder. Version X9.03.24.00.07l and possibly earlier are reported to contain multiple vulnerabilities.

CWE-798: Use of Hard-coded Credentials - CVE-2016-6535

AVer Information EH6108H+ reportedly contains two undocumented, hard-coded account credentials. Both accounts have root privileges and may be used to gain access via an undocumented telnet service that cannot be disabled through the web user interface and runs by default.

CWE-302: Authentication Bypass by Assumed-Immutable Data - CVE-2016-6536

By guessing the handle parameter of the /setup page of the web interface, an unauthenticated attacker reportedly may be able to access restricted pages and alter DVR configurations or change user passwords.

CWE-200: Information Exposure - CVE-2016-6537

User credentials are reported to be stored and transmitted in an insecure manner. In the configuration page of the web interface, passwords are stored in base64-encoded strings. In client requests, credentials are listed in plain text in the cookie header.

For more information, refer to the researcher’s disclosure.

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Impact

A remote, unauthenticated attacker may be able to gain access with root privileges to completely compromise vulnerable devices.

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Solution

The CERT/CC is currently unaware of a practical solution to this problem and recommends the following workaround.

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Restrict access

As a general good security practice, only allow connections from trusted hosts and networks.

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Vendor Information

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AVer Information Affected

Notified: May 16, 2016 Updated: September 08, 2016

Status

Affected

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

We are not aware of further vendor information regarding this vulnerability.

CVSS Metrics

Group	Score	Vector
Base	10	AV:N/AC:L/Au:N/C:C/I:C/A:C
Temporal	9	E:F/RL:U/RC:UR
Environmental	2.3	CDP:ND/TD:L/CR:ND/IR:ND/AR:ND

References

• <http://surveillance.aver.com/model/embedded-hybrid-DVR-EH6108H-plus/&gt;
• <https://www.appsecconsulting.com/blog/easy-root-on-aver-eh6108h-hybrid-dvr-and-more&gt;
• <https://cwe.mitre.org/data/definitions/798.html&gt;
• <https://cwe.mitre.org/data/definitions/302.html&gt;
• <https://cwe.mitre.org/data/definitions/200.html&gt;

Acknowledgements

Thanks to Travis Lee for reporting these vulnerabilities.

This document was written by Joel Land.

Other Information

CVE IDs:	CVE-2016-6535, CVE-2016-6536, CVE-2016-6537
Date Public:	2016-09-13 Date First Published: