Creston Electronics Security Updates

Number: AV16-124
Date: Aug 4, 2016

Purpose

The purpose of this advisory is to bring attention to security updates available for DM-TXRX-100-STR web management interface by Creston Electronics.

Assessment

Creston Electronics released a security update to address 5 critical vulnerabilities in the DM-TXRX-100-STR web interface.  Exploitation of these vulnerabilities can allow for authentication bypass, unauthorized access and cross-site request forgery.  Vulnerable devices also contain hard-coded administrative credentials and a publicly known cryptographic key. 

Affected versions:
DM-TXRX-100-STR versions prior to 1.3039.00040

CVE References: CVE-2016-5666, CVE-2016-5667, CVE-2016-5668, CVE-2016-5669, CVE-2016-5670, CVE-2016-5671

One vulnerability (CVE-2016-5671) remains unpatched, with a firmware update forthcoming from the manufacturer.

Suggested action

CCIRC recommends that system administrators test and deploy the vendor-released updates to affected applications accordingly.  For the vulnerability without a released update, system administrators should monitor for its release then their organization's patch management process should be actioned accordingly.  Any default device passwords should be reset, then changed regularly using a strong password policy.

References

Vendor Download:   
https://www.crestron.com/resources/resource-library/firmware

Advisories:
http://www.kb.cert.org/vuls/id/974424
https://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2016-5666
https://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2016-5667  
https://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2016-5668

https://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2016-5669
https://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2016-5670
https://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2016-5671

Note to Readers

In support of Public Safety's mission to build a safe and resilient Canada, CCIRC's mandate is to help ensure the security and resilience of the vital non-federal government cyber systems that underpin Canada's national security, public safety and economic prosperity. As Canada's computer security incident response team, CCIRC is Canada's national coordination centre for the prevention and mitigation of, preparedness for, response to, and recovery from cyber incidents on non-federal government systems. It does this by providing authoritative advice and support, and coordinating information sharing and incident response.

Please note, CCIRC PGP key has recently been updated.
http://www.publicsafety.gc.ca/cnt/ntnl-scrt/cbr-scrt/_fl/CCIRCPublicPGPKey.txt

For general information, please contact Public Safety Canada's Public Affairs division at:

Telephone: 613-944-4875 or 1-800-830-3118
Fax: 613-998-9589
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