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AUSCERT External Security Bulletin Redistribution
ESB-2015.0773
Cisco Wireless LAN Controller Task Name aaaQueueReader
Denial of Service Vulnerability
30 March 2015
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AusCERT Security Bulletin Summary
---------------------------------
Product: Cisco Wireless LAN Controller
Publisher: Cisco Systems
Operating System: Cisco
Impact/Access: Denial of Service -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2015-0679
Original Bulletin:
http://tools.cisco.com/security/center/viewAlert.x?alertId=38076
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Vulnerability Alert
Cisco Wireless LAN Controller Task Name aaaQueueReader Denial of Service
Vulnerability
Threat Type: CWE-399: Resource Management Errors
IntelliShield ID: 38076
Version: 1
First Published: 2015 March 26 20:06 GMT
Last Published: 2015 March 26 20:06 GMT
Port: Not available
CVE: CVE-2015-0679
Urgency: Unlikely Use
Credibility: Confirmed
Severity: Mild Damage
CVSS Base: 5.7 CVSS Calculator
CVSS Version 2.0
CVSS Temporal: 5.0
Version Summary: Cisco Wireless LAN Controller contains a vulnerability that
could allow an unauthenticated, adjacent attacker to cause a denial of service
condition. Updates are available.
Description
A vulnerability in the web authentication feature of Cisco Wireless LAN
Controller (WLC) could allow an unauthenticated, adjacent attacker to cause a
denial of service (DoS) condition.
The vulnerability is due to the improper handling of ill-formed passwords by
the web authentication feature used by the affected software. An
unauthenticated, adjacent attacker could exploit this vulnerability by
submitting ill-formed passwords to an affected device. A successful exploit
could cause the device to crash and reload, resulting in a DoS condition.
Cisco has confirmed the vulnerability and released software updates.
Warning Indicators
At the time this alert was first published, Cisco WLC versions 7.3(103.8) and
7.4(110.0) were vulnerable. Later versions of Cisco WLC may also be
vulnerable.
IntelliShield Analysis
To exploit this vulnerability, an attacker must have access to the same
broadcast or collision domain as the targeted device. This access requirement
decreases the likelihood of a successful exploit.
Vendor Announcements
Cisco has released bug ID CSCui57980 for registered users that contains
additional details and an up-to-date list of affected product versions.
Impact
An unauthenticated, adjacent attacker could exploit this vulnerability to
cause an affected device to crash and reload, resulting in a DoS condition.
Technical Information
The vulnerability is due to the improper handling of ill-formed passwords by
the web authentication feature when authentication is done against a RADIUS
server. This causes the affected software to crash in task name
aaaQueueReader.
An unauthenticated, adjacent attacker could exploit this vulnerability by
submitting ill-formed passwords to an affected device. A successful exploit
could cause the WLC on the device to crash and reload, resulting in a DoS
condition.
Safeguards
Administrators are advised to apply the appropriate updates.
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 may consider using another authentication method such as
authenticating against an LDAP server.
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:
Cisco Cisco Wireless LAN Controller (WLC) 7.3 .103.8 | 7.4 .110.0
Associated Products:
N/A
Alerts and bulletins on the Cisco Security Intelligence Operations Portal are
highlighted by analysts in the Cisco Threat Operations Center and represent a
subset of the comprehensive content that is available through Cisco Security
IntelliShield Alert Manager Service. This customizable threat and
vulnerability alert service provides security staff with access to timely,
accurate, and credible information about threats and vulnerabilities that may
affect their environment.
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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