Protect yourself against future threats.
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA256
===========================================================================
AUSCERT External Security Bulletin Redistribution
ESB-2019.0448
Cisco Network Assurance Engine CLI Access with Default
Password Vulnerability
13 February 2019
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: Cisco Network Assurance Engine
Publisher: Cisco Systems
Operating System: Cisco
Impact/Access: Root Compromise -- Console/Physical
Resolution: Patch/Upgrade
CVE Names: CVE-2019-1688
Original Bulletin:
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190212-nae-dos
- --------------------------BEGIN INCLUDED TEXT--------------------
Cisco Network Assurance Engine CLI Access with Default Password Vulnerability
Priority: High
Advisory ID: cisco-sa-20190212-nae-dos
First Published: 2019 February 12 16:00 GMT
Version 1.0: Final
Workarounds: Yes
Cisco Bug IDs: CSCvo18229
CVE-2019-1688
CWE-798
CVSS Score:
7.7 AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H/E:X/RL:X/RC:X
Summary
o A vulnerability in the management web interface of Cisco Network Assurance
Engine (NAE) could allow an unauthenticated, local attacker to gain
unauthorized access or cause a Denial of Service (DoS) condition on the
server.
The vulnerability is due to a fault in the password management system of
NAE. An attacker could exploit this vulnerability by authenticating with
the default administrator password via the CLI of an affected server. A
successful exploit could allow the attacker to view potentially sensitive
information or bring the server down, causing a DoS condition.
Cisco has released software updates that address this vulnerability. There
are workarounds that address this vulnerability.
This advisory is available at the following link:
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190212-nae-dos
Affected Products
o Vulnerable Products
This vulnerability affects Cisco Network Assurance Engine (NAE) Release 3.0
(1). The default password condition only affects new installations of
Release 3.0(1).
Determining the NAE Software Release
To determine the software release that is running on the server,
administrators can log in to the web interface using the http(s)://
<system-ip> access URL and navigate to the Gear > About Network Assurance
Engine screen. The release information is displayed as follows:
Cisco Network Assurance Engine
Version 3.0(1)
Products Confirmed Not Vulnerable
Only products listed in the Vulnerable Products section of this advisory
are known to be affected by this vulnerability.
Details
o Customers upgrading from earlier versions will not be affected by this
vulnerability. However, any user passwords changed from the web management
interface in the affected release will not be propagated to the CLI. The
old password, from before the change in the web management interface, would
still be associated to the username in the CLI. See the Workarounds section
for information on how to synchronize the passwords again.
Workarounds
o The default administrator password can be changed from the CLI by setting a
new password with the passwd command. Customers wishing to implement this
workaround should contact Cisco TAC (Technical Assistance Center) so the
default password can be entered securely over a remote support session.
This will need to be done for all nodes in the cluster.
Fixed Software
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
software license:
https://www.cisco.com/c/en/us/products/end-user-license-agreement.html
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
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:
https://www.cisco.com/c/en/us/support/web/tsd-cisco-worldwide-contacts.html
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
This vulnerability is fixed in Cisco NAE Release 3.0(1a).
To fix the vulnerability, the administrator password should be changed from
the management web interface after upgrading to version 3.0(1a).
Software Download
Customers can download Cisco Network Assurance Software from the Software
Center on Cisco.com by doing the following:
Click Browse all.
Navigate to Data Center Analytics > Network Assurance Engine.
Access Cisco NAE releases by using the left pane of the software
downloads navigation.
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.
Source
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
o Subscribe
URL
o https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190212-nae-dos
Revision History
o +---------+-------------------------+---------+--------+------------------+
| Version | Description | Section | Status | Date |
+---------+-------------------------+---------+--------+------------------+
| 1.0 | Initial public release. | - | Final | 2019-February-12 |
+---------+-------------------------+---------+--------+------------------+
- --------------------------END INCLUDED TEXT--------------------
You have received this e-mail bulletin as a result of your organisation's
registration with AusCERT. The mailing list you are subscribed to is
maintained within your organisation, so if you do not wish to continue
receiving these bulletins you should contact your local IT manager. If
you do not know who that is, please send an email to auscert@auscert.org.au
and we will forward your request to the appropriate person.
NOTE: Third Party Rights
This security bulletin is provided as a service to AusCERT's members. As
AusCERT did not write the document quoted above, AusCERT has had no control
over its content. The decision to follow or act on information or advice
contained in this security bulletin is the responsibility of each user or
organisation, and should be considered in accordance with your organisation's
site policies and procedures. AusCERT takes no responsibility for consequences
which may arise from following or acting on information or advice contained in
this security bulletin.
NOTE: This is only the original release of the security bulletin. It may
not be updated when updates to the original are made. If downloading at
a later date, it is recommended that the bulletin is retrieved directly
from the author's website to ensure that the information is still current.
Contact information for the authors of the original document is included
in the Security Bulletin above. If you have any questions or need further
information, please contact them directly.
Previous advisories and external security bulletins can be retrieved from:
https://www.auscert.org.au/bulletins/
===========================================================================
Australian Computer Emergency Response Team
The University of Queensland
Brisbane
Qld 4072
Internet Email: auscert@auscert.org.au
Facsimile: (07) 3365 7031
Telephone: (07) 3365 4417 (International: +61 7 3365 4417)
AusCERT personnel answer during Queensland business hours
which are GMT+10:00 (AEST).
On call after hours for member emergencies only.
===========================================================================
-----BEGIN PGP SIGNATURE-----
Comment: http://www.auscert.org.au/render.html?it=1967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=MTss
-----END PGP SIGNATURE-----