Vulnerability identifier: #VU15413

Vulnerability risk: Low

CVSSv3.1: 7 [CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2018-15395

CWE-ID: CWE-264

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 authenticated attacker to gain elevated privileges on the target system.

The weakness exists in the authentication and authorization checking mechanisms of Cisco Wireless LAN Controller (WLC) Software due to the dynamic assignment of Security Group Tags (SGTs) during a wireless roam from one Service Set Identifier (SSID) to another within the Cisco TrustSec domain. An adjacent attacker can attempt to acquire an SGT from other SSIDs within the domain and gain privileged network access that should be prohibited under normal circumstances.

Mitigation
The vulnerability has been addressed in the versions 8.8(1.86), 8.5(131.0), 8.5(124.33), 8.5(120.7), 8.5(120.6)

Vulnerable software versions

Cisco Wireless LAN Controller: 8.5.120.0

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External links
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20181017-wlan-escalation

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Q & A

Can this vulnerability be exploited remotely?

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

Is there known malware, which exploits this vulnerability?

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