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             AUSCERT External Security Bulletin Redistribution

           Cisco IOx Data in Motion Stack Overflow Vulnerability
                               23 March 2017


        AusCERT Security Bulletin Summary

Product:           Cisco Data-in-Motion (DMo)
Publisher:         Cisco Systems
Operating System:  Cisco
Impact/Access:     Root Compromise -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2017-3853  

Original Bulletin: 

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Cisco IOx Data in Motion Stack Overflow Vulnerability


Advisory ID: cisco-sa-20170322-iox
First Published: 2017 March 22 16:00 GMT
Version 1.0: Final
Workarounds: No workarounds available
Cisco Bug IDs:
CVSS Score:
Base 9.8, Temporal 9.8


A vulnerability in the Data-in-Motion (DMo) process installed with the Cisco 
IOx application environment could allow an unauthenticated, remote attacker to
cause a stack overflow that could allow remote code execution with root 
privileges in the virtual instance running on an affected device.

The vulnerability is due to insufficient bounds checking in the DMo process. 
An attacker could exploit this vulnerability by sending crafted packets that 
are forwarded to the DMo process for evaluation. The impacts of a successful 
exploit are limited to the scope of the virtual instance and do not impact the
router that is hosting Cisco IOx.

Cisco has released software updates that address this vulnerability. There are
no workarounds that address this vulnerability.

This advisory is available at the following link:


Affected Products

Vulnerable Products

This vulnerability affects the following Cisco 800 Series Industrial 
Integrated Services Routers:
 Cisco IR809
 Cisco IR829

Cisco IOx Releases and are vulnerable.

Administrators can use the Cisco IOx Local Manager web-based management 
interface to determine which Cisco IOx release is running on a device:

 Launch the Local Manager GUI.
 Log in.
 Click the Systems Info tab. The Cisco IOx release is shown in the Software 
 Ver area.

Products Confirmed Not Vulnerable

No other Cisco products are currently known to be affected by this 


There are no workarounds that address this vulnerability.

Fixed Software

Cisco has released free software updates that address the vulnerability 
described in this advisory. Customers may only install and expect support for
software versions and feature sets for which they have purchased a license. By
installing, downloading, accessing, or otherwise using such software upgrades,
customers agree to follow the terms of the Cisco software license:


Additionally, customers may only download software for which they have a valid
license, procured from Cisco directly, or through a Cisco authorized reseller
or partner. In most cases this will be a maintenance upgrade to software that
was previously purchased. Free security software updates do not entitle 
customers to a new software license, additional software feature sets, or 
major revision upgrades.

When considering software upgrades, customers are advised to regularly consult
the advisories for Cisco products, which are available from the Cisco Security
Advisories and Alerts page, to determine exposure and a complete upgrade 

In all cases, customers should ensure that the devices to upgrade contain 
sufficient memory and confirm that current hardware and software 
configurations will continue to be supported properly by the new release. If 
the information is not clear, customers are advised to contact the Cisco 
Technical Assistance Center (TAC) or their contracted maintenance providers.

Customers Without Service Contracts

Customers who purchase directly from Cisco but do not hold a Cisco service 
contract and customers who make purchases through third-party vendors but are
unsuccessful in obtaining fixed software through their point of sale should 
obtain upgrades by contacting the Cisco TAC:


Customers should have the product serial number available and be prepared to 
provide the URL of this advisory as evidence of entitlement to a free upgrade.

Fixed Releases

Cisco IOx version resolves this vulnerability.

Cisco IOx Release can be downloaded from the Software Center on 
Cisco.com by navigating to Products > Routers > Industrial Routers > 800 
Series Industrial Integrated Services Routers > 809 Industrial Integrated 
Services Routers > IOx Fog Node Software-1.2.0.

This release of Cisco IOx is also included in the Cisco IOS bundle image, 
which can be downloaded from the Software Center on Cisco.com by navigating to
Products > Routers > Industrial Routers > 800 Series Industrial Integrated 
Services Routers > 809 Industrial Integrated Services Routers > IOS 

Exploitation and Public Announcements

The Cisco Product Security Incident Response Team (PSIRT) is not aware of any
public announcements or malicious use of the vulnerability that is described 
in this advisory.


This vulnerability was found during internal testing.



Revision History

Version Description 		Section 	Status Date
1.0 	Initial public release. 		Final 	2017-March-22

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