Cisco Security Advisory
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AV:N/AC:L/Au:N/C:P/I:N/A:N/E:F/RL:U/RC:C
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A vulnerability in the Internet Access Point Protocol (IAPP) module of the Cisco Wireless LAN Controller (WLC) could allow an unauthenticated, remote attacker to cause network traffic to be forwarded to an unexpected destination network.
The vulnerability is due to improper input validation of the IPv6 packet. An attacker could exploit this vulnerability by sending crafted IPv6 packets to the WLC interface. An exploit could allow the attacker to send traffic to an unexpected destination on a remote sub-network.
Cisco has confirmed the vulnerability; however, software updates are not available.
To exploit this vulnerability, the attacker would need to send crafted IPv6 packets to the targeted device, making exploitation more difficult in environments that restrict network access from untrusted sources.
A successful exploit may disclosure sensitive information because network traffic is leaked outside the specified Control and Provisioning of Wireless Access Points Protocol (CAPWAP) Access Points (APs) configured in the networking environment. Exploiting this vulnerability may also result in a DoS condition, because network traffic can be forwarded to an unexpected destination network.
Cisco indicates through the CVSS score that functional exploit code exists; however, the code is not known to be publicly available.
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Cisco has released bug ID CSCuv40033 for registered users, which contains additional details and an up-to-date list of affected product versions.
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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 can help protect affected systems from external attacks by using a solid firewall strategy.
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.
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Software updates are not available.
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The Cisco Product Security Incident Response Team (PSIRT) is not aware of any public announcements or malicious use of the vulnerability that is described in this advisory.
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To learn about Cisco security vulnerability disclosure policies and publications, see the Security Vulnerability Policy. This document also contains instructions for obtaining fixed software and receiving security vulnerability information from Cisco.
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Show LessVersion Description Section Status Date 1.0 Initial Release NA Final 2015-Aug-21
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