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Vulnerability Alert

Cisco Small Business Wireless Access Points SSID Validation Vulnerability

 
Threat Type:CWE-20: Input Validation
IntelliShield ID:28231
Version:1
First Published:2013 February 13 21:31 GMT
Last Published:2013 February 13 21:31 GMT
Port: Not available
CVE:CVE-2013-1131
Urgency:Unlikely Use
Credibility:Confirmed
Severity:Mild Damage
CVSS Base:6.4 CVSS Calculator
CVSS Version 2.0
CVSS Temporal:5.3
 
 
Version Summary:Cisco Small Business Wireless Access Points contain a vulnerability that could allow an unauthenticated, adjacent attacker to cause a denial of service condition on a targeted device. Updates are available.
 
 
Description
Cisco Small Business Wireless Access Points contain a vulnerability that could allow an unauthenticated, adjacent attacker cause a denial of service (DoS) condition.

The vulnerability is due to improper validation of the Service Set Identifier (SSID) when the affected product is performing a "site survey" to discover adjacent available networks. An unauthenticated attacker with access to an adjacent network may be able to exploit this vulnerability by broadcasting a crafted SSID and convincing the administrator of the affected device to perform a site survey. A successful attack could cause a DoS condition. Additionally, there is the risk that the attacker could obtain the ability to override part of the memory of the affected device. However, the ability to override memory has not been confirmed.

Cisco has confirmed this vulnerability in a security notice and released software updates.
 
Warning Indicators
The following Cisco products are affected:
  • Cisco WAP200 Wireless-G Access Point Firmware versions 2.0(2.4), 2.0(4.0), and 2.0(6.0)
  • Cisco WAP2000 Wireless-G Access Point Firmware versions 2.0(0.5), 2.0(3.4), 2.0(4.0), 2.0(5.0), 2.0(6.0), and 2.0(8.0)
  • Cisco WAP200E Wireless-G Exterior Access Point Firmware versions 2.0(2.1), 2.0(3.0), 2.0(5.0), and 2.0(7.0)
  • Cisco WET200 Wireless-G Business Ethernet Bridge Firmware versions 2.0(4.0), 2.0(5.0), 2.0(6.0),  and 2.0(8.0)
 
IntelliShield Analysis
To exploit the vulnerability, the attacker must have access to an adjacent network and use misleading language or instructions to persuade the administrator to conduct a site survey. This access and user interaction requirement may reduce 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 for bug ID's CSCua86182, CSCua91196, CSCud36155, and CSCua86190 at the following link: CVE-2013-1131
 
Impact
An unauthenticated attacker with access to an adjacent network could exploit this vulnerability to cause a DoS condition on a targeted device.
 
Technical Information
Additional technical details are unavailable.
 
Safeguards
Administrators are advised to apply the appropriate updates.

Users are advised not to open e-mail messages from suspicious or unrecognized sources.

Administrators are advised to monitor affected systems.
 
Patches/Software
Cisco customers with active contracts should contact their Cisco support team for assistance in upgrading to a software version that includes fixes for this vulnerability.

Cisco customers without contracts may contact the Cisco Technical Assistance Center at 1-800-553-2447 or 1-408-526-7209 or via e-mail at tac@cisco.com for assistance.
 
Alert History
 
Initial Release


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

Primary Products:
CiscoCisco WAP2000 Wireless-G Access Point Firmware 2.0 Base, .0.5, .3.4, .4.0, .5.0, .6.0, .8.0
CiscoCisco WAP200 Wireless-G Access Point Firmware 2.0 Base, .2.4, .4.0, .6.0
CiscoCisco WAP200E Wireless-G Exterior Access Point Firmware 2.0 Base, .2.1, .3.0, .5.0, .7.0
CiscoCisco WET200 Wireless-G Business Ethernet Bridge Firmware 2.0 Base, .4.0, .5.0, .6.0, .8.0

Associated Products:
N/A



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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