CVE-2017-3854 Auth bypass in Cisco Meshed Wireless LAN Controller
An unauthenticated remote attacker can impersonate a parent access point in a meshed topology to control traffic or take full control of the system.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2017-3854?
CVE-2017-3854 is a high-severity authentication bypass vulnerability in Cisco Wireless Lan Controller Software, published on 15 Mar 2017. It can only be exploited from the same machine or local network, with no action from the victim.
Official 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.
Weakness: CWE-287
Which versions are affected by CVE-2017-3854?
It affects 2 products.
Products include Cisco Wireless Lan Controller Firmware, Cisco Wireless Lan Controller Software.
How do I fix CVE-2017-3854?
No fix has been published for CVE-2017-3854 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2017-3854 being exploited?
There is no known exploitation of CVE-2017-3854 in the wild and no public exploit code.
Other vulnerabilities in Cisco Wireless Lan Controller Software
Sources
Also known as GHSA-w9r3-r3v7-mcvc.