CVE-2017-3854

Description

A vulnerability in the mesh code of Cisco Wireless LAN Controller (WLC) software could allow an unauthenticated, remote attacker to impersonate a WLC in a meshed topology. The vulnerability is due to insufficient authentication of the parent access point in a mesh configuration. An attacker could exploit this vulnerability by forcing the target system to disconnect from the correct parent access point and reconnect to a rogue access point owned by the attacker. An exploit could allow the attacker to control the traffic flowing through the impacted access point or take full control of the target system. This vulnerability affects the following products running a vulnerable version of Wireless LAN Controller software and configured for meshed mode: Cisco 8500 Series Wireless Controller, Cisco 5500 Series Wireless Controller, Cisco 2500 Series Wireless Controller, Cisco Flex 7500 Series Wireless Controller, Cisco Virtual Wireless Controller, Wireless Services Module 2 (WiSM2). Note that additional configuration is needed in addition to upgrading to a fixed release. Cisco Bug IDs: CSCuc98992 CSCuu14804.

Category

8.8
CVSS
Severity: High
CVSS 3.1 •
CVSS 2.0 •
EPSS 1.36% Top 25%
Vendor Advisory cisco.com
Affected: n/a Cisco Meshed Wireless LAN Controller
Published at:
Updated at:

References

Link Tags
http://www.securitytracker.com/id/1038041 third party advisory vdb entry
http://www.securityfocus.com/bid/96911 third party advisory vdb entry
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170315-wlc-mesh vendor advisory

Frequently Asked Questions

What is the severity of CVE-2017-3854?
CVE-2017-3854 has been scored as a high severity vulnerability.
How to fix CVE-2017-3854?
To fix CVE-2017-3854, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2017-3854 being actively exploited in the wild?
It is possible that CVE-2017-3854 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2017-3854?
CVE-2017-3854 affects n/a Cisco Meshed Wireless LAN Controller.
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