Vulnerability Alert

Cisco Aironet 3600 Series Access Point Denial of Service Vulnerability

 
Threat Type:CWE-399: Resource Management Errors
IntelliShield ID:30170
Version:1
First Published:2013 July 22 19:25 GMT
Last Published:2013 July 22 19:25 GMT
Port: Not available
CVE:CVE-2013-3441
Urgency:Unlikely Use
Credibility:Confirmed
Severity:Mild Damage
CVSS Base:5.4 CVSS Calculator
CVSS Version 2.0
CVSS Temporal:5.1
 
Version Summary:Cisco Aironet 3600 Series Access Point contains a vulnerability that could allow an unauthenticated, remote attacker to create a denial of service condition. Updates are not available.
 
 
Description
A vulnerability in the Cisco Aironet 3600 Series Access Point could allow an unauthenticated, remote attacker to trigger a denial of service condition.

The vulnerability is due to a memory corruption condition that could occur when the device switches between FlexConnect and Standalone mode. An attacker could exploit this vulnerability by disrupting the communications path between a configured and provisioned FlexConnect access point and the Cisco Wireless LAN Controller. An exploit could allow the attacker to cause the access point to crash, resulting in a denial of service condition forcing the device to restart. 

This issue has been observed to occur when a switch between FlexConnect and Standalone mode transpires frequently during a 24 to 48 hour period.

Cisco has confirmed this vulnerability in a security notice; however, software updates are not available.
 
Warning Indicators
At the time this alert was first published, Cisco Aironet Access Point Software version 7.4 is vulnerable. Later releases of Cisco Aironet Access Point Software may also be affected.
 
IntelliShield Analysis
To exploit this vulnerability, an attacker may require access to trusted, internal networks in which the targeted device may reside. This access requirement could limit the likelihood of a successful exploit.

Cisco indicates through the CVSS score that functional exploit code exists; however, the code is not known to be publicly available.
 
Vendor Announcements
Cisco has released a security notice at the following link: CVE-2013-3441

Customers should refer to Cisco bug ID CSCuh71210 for the most complete list of affected product versions.
 
Impact
An unauthenticated, remote attacker could exploit this vulnerability to cause an affected access point to crash, resulting in a DoS condition.
 
Technical Information
The vulnerability is due to a memory corruption condition that could occur when the device switches between FlexConnect and Standalone mode.

An unauthenticated, remote attacker could exploit this vulnerability by disrupting the communications path between a configured and provisioned FlexConnect access point and the Cisco Wireless LAN Controller. An exploit could allow the attacker to cause the access point to crash, resulting in a DoS condition and forcing the device to restart.
 
Safeguards
Administrators are advised to contact the vendor regarding future updates and releases.

Administrators are advised to allow only trusted users to have network access.

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

Administrators are advised to monitor affected systems.
 
Patches/Software
Software updates are not available.
 
Alert History
 
Initial Release


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

Primary Products:
N/A

Associated Products:
CiscoCisco Aironet Access Point Software 7.4 Base




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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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