A vulnerability has been found in Cisco Wireless LAN Controller (Wireless LAN Software) (unknown version) and classified as critical. Affected by this vulnerability is an unknown code block of the component TrustSec Domain Handler. The manipulation with an unknown input leads to a privileges management vulnerability. The CWE definition for the vulnerability is CWE-269. The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

A vulnerability in the authentication and authorization checking mechanisms of Cisco Wireless LAN Controller (WLC) Software could allow an authenticated, adjacent attacker to gain network access to a Cisco TrustSec domain. Under normal circumstances, this access should be prohibited. The vulnerability is 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 attacker could exploit this vulnerability by attempting to acquire an SGT from other SSIDs within the domain. Successful exploitation could allow the attacker to gain privileged network access that should be prohibited under normal circumstances.

The bug was discovered 10/17/2018. The weakness was published 10/17/2018 with Cisco as cisco-sa-20181017-wlan-escalat as confirmed advisory (Website). The advisory is shared at tools.cisco.com. This vulnerability is known as CVE-2018-15395 since 08/17/2018. Access to the local network is required for this attack. The requirement for exploitation is a single authentication. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 05/30/2023). MITRE ATT&CK project uses the attack technique T1068 for this issue.

The commercial vulnerability scanner Qualys is able to test this issue with plugin 316347 (Cisco Wireless LAN Controller Software Privilege Escalation Vulnerability(cisco-sa-20181017-wlan-escalation)).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Type

• Wireless LAN Software

Vendor

• Cisco

Name

• Wireless LAN Controller

License

• commercial

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