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AUSCERT External Security Bulletin Redistribution
ESB-2018.1510
Critical vulnerabilities patched in Cisco Digital Network
Architecture Center
17 May 2018
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: Cisco Digital Network Architecture Center
Publisher: Cisco Systems
Operating System: Network Appliance
Impact/Access: Administrator Compromise -- Remote/Unauthenticated
Execute Arbitrary Code/Commands -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2018-0271 CVE-2018-0268 CVE-2018-0222
Original Bulletin:
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180516-dna2
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180516-dnac
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180516-dna
Comment: This bulletin contains three (3) Cisco Systems security advisories.
- --------------------------BEGIN INCLUDED TEXT--------------------
Cisco Digital Network Architecture Center Authentication Bypass Vulnerability
Severity: Critical
Advisory ID: cisco-sa-20180516-dna2
First Published: 2018 May 16 16:00 GMT
Version 1.0: Final
Workarounds: No workarounds available
Cisco Bug IDs: CSCvi09394
CVE-2018-0271
CVSS Score:
Base 10.0
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:X/RL:X/RC:X
CVE-2018-0271
Summary
* A vulnerability in the API gateway of the Cisco Digital Network
Architecture (DNA) Center could allow an unauthenticated, remote attacker
to bypass authentication and access critical services.
The vulnerability is due to a failure to normalize URLs prior to servicing
requests. An attacker could exploit this vulnerability by submitting a
crafted URL designed to exploit the issue. A successful exploit could allow
the attacker to gain unauthenticated access to critical services, resulting
in elevated privileges in DNA Center.
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:
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/
cisco-sa-20180516-dna2
Affected Products
* Vulnerable Products
This vulnerability affects Cisco DNA Center Software Releases prior to
1.1.2.
Determining the DNA Center Software Release
To determine which Cisco DNA Center release is running on a system,
administrators can use a web browser to access Cisco DNA Center via HTTPS.
The release can be viewed by clicking Settings and selecting About DNA
Center from the drop-down menu. Click Show Packages and note the System
version.
Products Confirmed Not Vulnerable
Only products listed in the Vulnerable Products section of this advisory
are known to be affected by this vulnerability.
Workarounds
* 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:
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 DNA Center Releases 1.1.2 and later.
Cisco DNA Center is a dedicated physical appliance purchased from Cisco
with the DNA Center ISO image preinstalled. System updates are available
for installation from the Cisco cloud and are not available for download
from the Software Center on Cisco.com. To upgrade to a fixed release of
Cisco DNA Center Software, administrators can use the System Updates
feature of the software. For more information, refer to the Cisco Digital
Network Architecture Center Administrator Guide and the release notes for
the release to be installed.
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.
Source
* This vulnerability was found during internal security testing.
Cisco Security Vulnerability Policy
* 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
* Subscribe
URL
* https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/
cisco-sa-20180516-dna2
Revision History
*
+-----------------------------------------------------------------------------+
| Version | Description | Section | Status | Date |
|----------+-----------------------------+----------+---------+---------------|
| 1.0 | Initial public release. | ? | Final | 2018-May-16 |
+-----------------------------------------------------------------------------+
- --------------------------------------------------------------------------------
Cisco Digital Network Architecture Center Static Credentials Vulnerability
Severity: Critical
Advisory ID: cisco-sa-20180516-dnac
First Published: 2018 May 16 16:00 GMT
Version 1.0: Final
Workarounds: No workarounds available
Cisco Bug IDs: CSCvh98929
CVSS Score:
Base 10.0
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:X/RL:X/RC:X
CVE-2018-0222
Summary
* A vulnerability in Cisco Digital Network Architecture (DNA) Center could
allow an unauthenticated, remote attacker to log in to an affected system
by using an administrative account that has default, static user
credentials.
The vulnerability is due to the presence of undocumented, static user
credentials for the default administrative account for the affected
software. An attacker could exploit this vulnerability by using the account
to log in to an affected system. A successful exploit could allow the
attacker to log in to the affected system and execute arbitrary commands
with root privileges.
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:
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/
cisco-sa-20180516-dnac
Affected Products
* Vulnerable Products
This vulnerability affects all releases of Cisco DNA Center Software prior
to Release 1.1.3.
To determine which Cisco DNA Center Software release is running on a
system, administrators can do the following:
1. By using a compatible, HTTPS-enabled browser, log in to the Cisco DNA
Center GUI via HTTPS.
2. On the DNA Center home page, click the settings (gear) icon, and then
click About DNA Center.
The System version field indicates which release is currently running on
the system.
Products Confirmed Not Vulnerable
Only products listed in the Vulnerable Products section of this advisory
are known to be affected by this vulnerability.
Workarounds
* 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:
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 DNA Center Software Releases 1.1.3 and
later.
Cisco DNA Center is a dedicated physical appliance that is purchased from
Cisco with the DNA Center ISO image preinstalled. System updates are
available for installation from the Cisco cloud and are not available for
download from the Software Center on Cisco.com. To upgrade to a fixed
release of Cisco DNA Center Software, administrators can use the System
Updates feature of the software. For more information, refer to the Cisco
Digital Network Architecture Center Administrator Guide and the release
notes for the release to be installed.
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.
Source
* This vulnerability was found during internal security testing.
URL
* https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/
cisco-sa-20180516-dnac
Revision History
*
+-----------------------------------------------------------------------------+
| Version | Description | Section | Status | Date |
|----------+-----------------------------+----------+---------+---------------|
| 1.0 | Initial public release. | ? | Final | 2018-May-16 |
+-----------------------------------------------------------------------------+
- --------------------------------------------------------------------------------
Cisco Digital Network Architecture Center Unauthorized Access Vulnerability
Severity: Critical
Advisory ID: cisco-sa-20180516-dna
First Published: 2018 May 16 16:00 GMT
Version 1.0: Final
Workarounds: No workarounds available
Cisco Bug IDs: CSCvi47253
CVSS Score:
Base 10.0
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:X/RL:X/RC:X
CVE-2018-0268
Summary
* A vulnerability in the container management subsystem of Cisco Digital
Network Architecture (DNA) Center could allow an unauthenticated, remote
attacker to bypass authentication and gain elevated privileges.
This vulnerability is due to an insecure default configuration of the
Kubernetes container management subsystem within DNA Center. An attacker
who has the ability to access the Kubernetes service port could execute
commands with elevated privileges within provisioned containers. A
successful exploit could result in a complete compromise of affected
containers.
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:
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/
cisco-sa-20180516-dna
Affected Products
* Vulnerable Products
This vulnerability affects Cisco DNA Center Software Releases 1.1.3 and
prior.
Determining the DNA Center Software Release
To determine which Cisco DNA Center release is running on a system,
administrators can use a web browser to access Cisco DNA Center via HTTPS.
The release can be viewed by clicking Settings and selecting About DNA
Center from the drop-down menu. Click Show Packages and note the System
version.
Products Confirmed Not Vulnerable
Only products listed in the Vulnerable Products section of this advisory
are known to be affected by this vulnerability.
Workarounds
* 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:
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 DNA Center Releases 1.1.4 and later.
Cisco DNA Center is a dedicated physical appliance purchased from Cisco
with the DNA Center ISO image preinstalled. System updates are available
for installation from the Cisco cloud and are not available for download
from the Software Center on Cisco.com. To upgrade to a fixed release of
Cisco DNA Center Software, administrators can use the System Updates
feature of the software. For more information, refer to the Cisco Digital
Network Architecture Center Administrator Guide and the release notes for
the release to be installed.
Exploitation and Public Announcements
* The Cisco Product Security Incident Response Team (PSIRT) is not aware of
public announcements or malicious use of the vulnerability that is
described in this advisory.
Source
* This vulnerability was found during resolution of a customer case handled
by the Cisco TAC.
URL
* https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/
cisco-sa-20180516-dna
Revision History
*
+-----------------------------------------------------------------------------+
| Version | Description | Section | Status | Date |
|----------+-----------------------------+----------+---------+---------------|
| 1.0 | Initial public release. | ? | Final | 2018-May-16 |
+-----------------------------------------------------------------------------+
- --------------------------END INCLUDED TEXT--------------------
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