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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
CVE Names: CVE-2017-3853
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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:
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:
This vulnerability affects the following Cisco 800 Series Industrial
Integrated Services Routers:
Cisco IOx Releases 18.104.22.168 and 22.214.171.124 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.
Click the Systems Info tab. The Cisco IOx release is shown in the Software
Products Confirmed Not Vulnerable
No other Cisco products are currently known to be affected by this
There are no workarounds that address this vulnerability.
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.
Cisco IOx version 126.96.36.199 resolves this vulnerability.
Cisco IOx Release 188.8.131.52 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.
Version Description Section Status Date
1.0 Initial public release. Final 2017-March-22
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