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AUSCERT External Security Bulletin Redistribution
Cisco Wireless LAN Controller Cisco Discovery Protocol
Denial of Service Vulnerability
10 June 2014
AusCERT Security Bulletin Summary
Product: Cisco Wireless LAN Controller
Publisher: Cisco Systems
Operating System: Cisco
Impact/Access: Denial of Service -- Remote/Unauthenticated
CVE Names: CVE-2014-3291
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Cisco Security Notice
Cisco Wireless LAN Controller Cisco Discovery Protocol Denial of Service
CVE ID: CVE-2014-3291
Release Date: 2014 June 6 17:54 UTC (GMT)
Last Updated: 2014 June 9 20:43 UTC (GMT)
A vulnerability in the Cisco Discovery Protocol subsystem of Cisco Wireless
LAN Controllers could allow an unauthenticated, adjacent attacker to cause a
denial of service (DoS) condition.
The vulnerability is due to a failure to properly check for certain NULL
values present in a Cisco Discovery Protocol packet. An attacker could exploit
this vulnerability by submitting crafted Cisco Discovery Protocol requests to
an affected device. The attacker would then need to convince a user to perform
a Simple Network Management Protocol (SNMP) poll of the affected MIB. An
attacker that can convince a user to perform an SNMP poll of the affected MIB
could trigger a NULL pointer error that results in a restart of the device.
Product More Information CVSS
Cisco Wireless LAN Controller (WLC) CSCuo12321 5.7/4.7
What Is a Cisco Security Notice?
The Cisco Product Security Incident Response Team (PSIRT) publishes Cisco
Security Notices to inform customers of low- to mid-level severity security
issues involving Cisco products.
Customers who wish to upgrade to a software version that includes fixes for
these issues should contact their normal support channels. Free software
updates will not be provided for issues that are disclosed through a Cisco
For additional information about Cisco PSIRT publications, see the Cisco
Security Vulnerability Policy at
Customers Using Third-Party Support Organizations
Customers may have Cisco products that are provided or maintained through
prior or existing agreements with third-party support organizations, such as
Cisco Partners, authorized resellers, or service providers. For these
products, customers should consult their service providers or support
organizations to ensure that any applied workaround or fix is the most
appropriate in the intended network before it is deployed.
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RIGHT TO CHANGE OR UPDATE THIS DOCUMENT AT ANY TIME.
A stand-alone copy or paraphrase of the text of this document that omits the
distribution URL is an uncontrolled copy, and may lack important information
or contain factual errors.
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