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Vulnerability Alert

Cisco Wireless LAN Controller Buffer Overread Vulnerability

 
Threat Type:CWE-20: Input Validation
IntelliShield ID:31867
Version:1
First Published:2013 November 22 16:06 GMT
Last Published:2013 November 22 16:06 GMT
Port: Not available
CVE:CVE-2013-6699
BugTraq ID:63865
Urgency:Unlikely Use
Credibility:Confirmed
Severity:Mild Damage
CVSS Base:5.0 CVSS Calculator
CVSS Version 2.0
CVSS Temporal:5.0
 
 
Version Summary:Cisco Wireless LAN Controller contains a vulnerability that could allow an unauthenticated, remote attacker to cause a denial of service condition. Updates are not available.
 
 
Description
A vulnerability in the Control and Provisioning of Wireless Access Points (CAPWAP) protocol of the Cisco Wireless LAN Controller (WLC) could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition.

The vulnerability is due to insufficient data packet validation. An attacker could exploit this vulnerability by sending a crafted CAPWAP packet to the Cisco WLC.

Cisco has confirmed the vulnerability in a security notice; however, software updates are not available.
 
Warning Indicators
At the time this alert was first published, Cisco WLC versions 7.4(.110) and prior were vulnerable. Later releases of Cisco WLC may also be vulnerable.
 
IntelliShield Analysis
To exploit this vulnerability, the attacker may need access to trusted, internal networks in which the targeted device may reside to send crafted CAPWAP packets to the device. This access requirement may reduce the likelihood of a successful exploit.
 
Vendor Announcements
Cisco has released a security notice at the following link: CVE-2013-6699

Customers are advised to consult Cisco bug ID CSCuh81880 for a complete list of affected product versions.
 
Impact
An unauthenticated, remote attacker could exploit this vulnerability to cause an affected device to crash or become unresponsive, resulting in a DoS condition.
 
Technical Information
The vulnerability is due to insufficient  validation of data packets by the affected software.

An unauthenticated, remote attacker could exploit this vulnerability by sending a crafted CAPWAP packet to the targeted device. Processing the crafted packet could cause the device to crash or become unresponsive, resulting in a DoS condition.
 
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:
CiscoCisco Wireless LAN Controller (WLC) 3.0 Base | 3.1 .59.24, .105.0, .111.0 | 3.2 .78.0, .116.21, .150.6, .150.10, .171.5, .171.6, .185.0, .193.5, .195.10 | 4.0 .108, .155.0, .155.5, .179.8, .179.11, .196, .206.0, .217.0, .219.0 | 4.1 Base, .171.0, .181.0, .185.0 | 4.2 Base, .61.0, .99.0, .112.0, .117.0, .130.0, .173.0, .174.0, .176.0, .182.0 | 5.0 .148.0, .148.2 | 5.1 .151.0, .152.0, .160.0 | 5.2 .157.0, .169.0 | 6.0 Base, 182.0, 188.0, 196.0, 199.4, 202.0 | 7.0 Base, 98.0, 98.218, 116.0, 220.0 | 7.1 Base, 91.0 | 7.2 Base, 103.0 | 7.3 Base, .101.0, .112 | 7.4 Base, 1.54, .100, .100.60, .110

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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