AV:N/AC:M/Au:S/C:C/I:C/A:C/E:F/RL:OF/RC:C
-
A vulnerability in the Device Manager GUI of the Cisco ACE 4710 Application Control Engine could allow an authenticated, remote attacker to execute any command-line interface (CLI) command on the ACE with admin user privileges.
The vulnerability is due to insufficient validation of user-supplied input. An attacker could exploit this vulnerability by crafting a malicious HTTP POST request with injected CLI commands inside the value of a POST parameter value. An exploit could allow the attacker to bypass the role-based access control (RBAC) restrictions enforced by the Cisco ACE Device Manager GUI.
Cisco has released software updates that address this vulnerability. Workarounds that mitigate this vulnerability are available.
This advisory is available at the following link: http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160224-ace
-
Vulnerable Products
Cisco ACE 4710 Application Control Engine running A5 software releases up to A5(3.0) is vulnerable when configured to allow access to the Device Manager GUI. Inspect the relevant sections of the configuration to determine whether Device Manager GUI access is configured on the ACE, as shown in the following example:
To determine which software version is running on the appliance, administrators can issue the show version command. The following is an example of the output of this command issued on a system running software version A5(3.2):ace-4710-1/Admin# show running-config
Generating configuration....
[...]
class-map type management match-any my-mgmt-class
202 match protocol icmp any
203 match protocol https any
204 match protocol ssh any
[...]
policy-map type management first-match my-mgmt-pol
class my-mgmt-class
permit
[...]
interface vlan 2
[...]
service-policy input my-mgmt-pol
service-policy input other-traffic
no shutdown
ace-4710-1/Admin# show version
Cisco Application Control Software (ACSW) TAC support: http://www.cisco.com/tac Copyright (c) 1985-2015 by Cisco Systems, Inc. All rights reserved. The copyrights to certain works contained herein are owned by other third parties and are used and distributed under license. Some parts of this software are covered under the GNU Public License. A copy of the license is available at http://www.gnu.org/licenses/gpl.html.
Software loader: Version 0.95.1 system: Version A5(3.2) [build 3.0(0)A5(3.2) adbuild
_17:03:27-2015/04/02_/auto/adbure_nightly4/renumber
/rel_a5_3_2_throttle/REL_3_0_0_A5_3_2] system image file: (hd0,1)/c4710ace-t1k9-mz.A5_3_2.bin Device Manager version 5.3.2 (0) 20150331:0838Products Confirmed Not Vulnerable
No other Cisco products are currently known to be affected by this vulnerability.
Cisco has confirmed that this vulnerability does not affect the following Cisco products:
- Cisco ACE Application Control Engine Module
- Cisco Application Networking Manager (ANM)
-
Administrators can disable management access to the Cisco ACE 4710 Application Control Engine Device Manager GUI until the appropriate fix can be applied. The following example shows how to disable access, assuming the device is configured with the following management class map:
class-map type management match-any my-mgmt-class 202 match protocol icmp any 203 match protocol https any 204 match protocol ssh any
ace-4710-1/Admin# configure terminal Enter configuration commands, one per line. End with CNTL/Z.
ace-4710-1/Admin(config)# class-map type management match-any my-mgmt-class ace-4710-1/Admin(config-cmap-mgmt)# no match protocol https any
-
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: http://www.cisco.com/en/US/docs/general/warranty/English/EU1KEN_.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 consult the Cisco Security Advisories and Responses archive at http://www.cisco.com/go/psirt and review subsequent advisories to determine exposure and a complete upgrade solution.
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 Technical Assistance Center (TAC): http://www.cisco.com/en/US/support/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 Versions
The vulnerability described in this advisory has been fixed in software versions: A5(3.3), A5(3.2), A5(3.1b), A5(3.1a), and A5(3.1).
-
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 reported to Cisco by Jan Kadijk of Warpnet BV.
-
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.
-
Version Description Section Status Date 1.0 Initial public release. — Final 2016-February-24
-
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.