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AUSCERT External Security Bulletin Redistribution
Cisco Network Services Orchestrator Arbitrary Command
7 June 2018
AusCERT Security Bulletin Summary
Product: Cisco Network Services Orchestrator
Publisher: Cisco Systems
Operating System: Cisco
Impact/Access: Root Compromise -- Existing Account
CVE Names: CVE-2018-0274
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Cisco Network Services Orchestrator Arbitrary Command Execution Vulnerability
Advisory ID: cisco-sa-20180606-nso
First Published: 2018 June 6 16:00 GMT
Version 1.0: Final
Workarounds: No workarounds available
Cisco Bug IDs: CSCvf99982
CVSS Score: Base 8.1
o A vulnerability in the CLI parser of Cisco Network Services Orchestrator
(NSO) could allow an authenticated, remote attacker to execute arbitrary
shell commands with the privileges of the root user.
The vulnerability is due to insufficient input validation. An attacker
could exploit this vulnerability by injecting malicious arguments into
vulnerable commands. A successful exploit could allow the attacker to
execute arbitrary commands with root privileges on the affected system.
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:
o Vulnerable Products
This vulnerability affects the following releases of Cisco Network Services
o 4.1 through 22.214.171.124
o 4.2 through 126.96.36.199
o 4.3 through 188.8.131.52
o 4.4 through 184.108.40.206
To determine which release of the software is currently running on a
device, administrators can use the show ncs-state version command in the
device CLI. The output of the command in the CLI is similar to the
following example, which shows Release 220.127.116.11 installed:
admin@ncs> show ncs-state version
ncs-state version 18.104.22.168
Products Confirmed Not Vulnerable
Only products listed in the Vulnerable Products section of this advisory
are known to be affected by this vulnerability.
o There are no workarounds that address this vulnerability.
o 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
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 solution.
In all cases, customers should ensure that the devices to be upgraded
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
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
Customers should upgrade to an appropriate release as indicated in the
Cisco NSO Major Release First Fixed Release
The software is available for download from the Software Center on
Cisco.com by searching for "Network Services Orchestrator" or by clicking
Browse All and navigating to Cloud and Systems Management > Service
Management and Orchestration > Network Services Orchestrator.
Exploitation and Public Announcements
o 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.
o This vulnerability was found during internal security testing.
Cisco Security Vulnerability Policy
o To learn about Cisco security vulnerability disclosure policies and
publications, see the Security Vulnerability Policy. This document also
contains instructions for obtaining fixed software and receiving security
vulnerability information from Cisco.
Subscribe to Cisco Security Notifications
| Version | Description | Section | Status | Date |
| 1.0 | Initial public release. | -- | Final | 2018-June-06 |
o THIS DOCUMENT IS PROVIDED ON AN "AS IS" BASIS AND DOES NOT IMPLY ANY KIND
OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTIES OF MERCHANTABILITY OR
FITNESS FOR A PARTICULAR USE. YOUR USE OF THE INFORMATION ON THE DOCUMENT
OR MATERIALS LINKED FROM THE DOCUMENT IS AT YOUR OWN RISK. CISCO RESERVES
THE RIGHT TO CHANGE OR UPDATE THIS DOCUMENT AT ANY TIME.
A standalone copy or paraphrase of the text of this document that omits the
distribution URL is an uncontrolled copy and may lack important information
or contain factual errors. The information in this document is intended for
end users of Cisco products.
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