Vulnerability identifier: #VU9088

Vulnerability risk: Low

CVSSv3.1: 3.8 [CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2017-12275

CWE-ID: CWE-20

Exploitation vector: Local network

Exploit availability: No

Vulnerable software:
Cisco Wireless LAN Controller
Hardware solutions / Firmware

Vendor: Cisco Systems, Inc

Description
The vulnerability allows an adjacent attacker to cause DoS condition on the target system.

The weakness exists in the implementation of 802.11v Basic Service Set (BSS) Transition Management functionality in Cisco Wireless LAN Controllers due to insufficient input validation of 802.11v BSS Transition Management Response packets that an affected device receives from wireless clients. An adjacent attacker can send a malformed 802.11v BSS Transition Management Response packet and cause the device to reload.

Successful exploitation of the vulnerability results in denial of service.

Mitigation
Install update from vendor's website (8.0.152.0, 8.2.164.0, 8.3.132.0, 8.4.100.0).

Vulnerable software versions

Cisco Wireless LAN Controller: 8.2.130.202 - 8.3.102.15

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External links
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20171101-wlc2

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the local network (LAN).

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.