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Vulnerability Alert

Cisco Wireless LAN Controller Unauthorized Access to Associated Access Points Vulnerability

 
Threat Type:CWE-362: Race Conditions
IntelliShield ID:33099
Version:1
First Published:2014 March 05 16:15 GMT
Last Published:2014 March 05 16:15 GMT
Port: Not available
CVE:CVE-2014-0703
Urgency:Unlikely Use
Credibility:Confirmed
Severity:Moderate Damage
CVSS Base:10.0 CVSS Calculator
CVSS Version 2.0
CVSS Temporal:8.7
Related Resources:
View related Security AdvisoryView related Applied Mitigation Bulletin
 
 
Version Summary:Cisco Wireless LAN Controller contains a vulnerability that could allow an unauthenticated, remote attacker to gain unauthorized access to the vulnerable device. Updates are available.
 
 
Description
A vulnerability in the Cisco IOS code that is pushed to Cisco Aironet 1260, 2600, 3500, and 3600 Series access points (AP) by a Cisco Wireless LAN Controller (WLC) could allow an unauthenticated, remote attacker to gain unauthorized, privileged access to the affected device.

The vulnerability is due to a race condition that could result in the administrative HTTP server of an affected access point being enabled even though it is explicitly disabled by an administrator. An attacker could exploit this vulnerability by attempting to authenticate to an affected device using locally-stored credentials of the AP. A successful attack could allow an attacker to take complete control of the affected AP and make arbitrary changes to the configuration.

In many deployment scenarios, the locally-stored default AP username and password has not been changed from the factory default. In these zero-touch scenarios, the devices are designed to connect automatically to a WLC and download firmware and configurations.

Cisco has confirmed the vulnerability in a security advisory and released software updates.
 
Warning Indicators
Cisco Wireless LAN Controller software prior to version 7.4.110.0 is affected.
 
IntelliShield Analysis
Attackers may require access to internal networks to connect to exposed HTTP services on affected devices.
 
Vendor Announcements
Cisco has released a security advisory for Cisco bug ID CSCuf66202 at the following link: cisco-sa-20140305-wlc
 
Impact
An unauthenticated, remote attacker could exploit the vulnerability to bypass access restrictions and make unauthorized changes to the device configuration that could allow an attacker to take complete control of the device.
 
Technical Information
The vulnerability is due to an error condition in the device administrative HTTP server. A race condition may occur that enables the HTTP server even though the interface is disabled in the device configuration.

An unauthenticated, remote attacker could exploit this vulnerability by connecting to the exposed administrative interface. The attacker could leverage the access to change values within the device configuration.
 
Safeguards
Administrators are advised to apply the appropriate updates.

Administrators may consider using IP-based access control lists (ACLs) to allow only trusted systems to access the affected systems.

The Cisco Applied Intelligence team has created the following companion document to guide administrators in identifying and mitigating attempts to exploit this vulnerability prior to applying updated software: Identifying and Mitigating Exploitation of Multiple Vulnerabilities in Cisco Wireless LAN Controllers

Administrators are advised to monitor affected systems.
 
Patches/Software
Cisco customers with active contracts can obtain updates through the Software Center at the following link: Cisco. Cisco customers without contracts can obtain upgrades by contacting the Cisco Technical Assistance Center at 1-800-553-2447 or 1-408-526-7209 or via email at tac@cisco.com.
 
Alert History
 
Initial Release


Product Sets
 
The security vulnerability applies to the following combinations of products.

Primary Products:
CiscoCisco Wireless LAN Controller (WLC) 7.4 Base, 1.54

Associated Products:
N/A




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LEGAL DISCLAIMER
The urgency and severity ratings of this alert are not tailored to individual users; users may value alerts differently based upon their network configurations and circumstances. THE ALERT, AND INFORMATION CONTAINED THEREIN, ARE PROVIDED ON AN "AS IS" BASIS AND DO NOT IMPLY ANY KIND OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE. YOUR USE OF THE ALERT, AND INFORMATION CONTAINED THEREIN, OR MATERIALS LINKED FROM THE ALERT, IS AT YOUR OWN RISK. INFORMATION IN THIS ALERT AND ANY RELATED COMMUNICATIONS IS BASED ON OUR KNOWLEDGE AT THE TIME OF PUBLICATION AND IS SUBJECT TO CHANGE WITHOUT NOTICE. CISCO RESERVES THE RIGHT TO CHANGE OR UPDATE ALERTS AT ANY TIME.
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