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Vulnerability of Cisco IOS XE: privilege escalation via MACsec MKA EAP-TLS Authentication Bypass

Synthesis of the vulnerability 

An attacker can bypass restrictions via MACsec MKA EAP-TLS Authentication Bypass of Cisco IOS XE, in order to escalate his privileges.
Impacted systems: Cisco ASR, Cisco Catalyst, IOS XE Cisco, Cisco Router.
Severity of this alert: 2/4.
Creation date: 27/09/2018.
Références of this alert: CERTFR-2018-AVI-458, cisco-sa-20180926-macsec, CSCvh09411, CVE-2018-15372, VIGILANCE-VUL-27335.

Description of the vulnerability 

An attacker can bypass restrictions via MACsec MKA EAP-TLS Authentication Bypass of Cisco IOS XE, in order to escalate his privileges.
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This weakness bulletin impacts software or systems such as Cisco ASR, Cisco Catalyst, IOS XE Cisco, Cisco Router.

Our Vigil@nce team determined that the severity of this computer weakness is medium.

The trust level is of type confirmed by the editor, with an origin of LAN.

An attacker with a expert ability can exploit this vulnerability announce.

Solutions for this threat 

Cisco IOS XE: solution CSCvh09411.
The solution is described on the Cisco site:
  https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvh09411
  https://tools.cisco.com/bugsearch/bug/CSCvh09411
  https://tools.cisco.com/quickview/bug/CSCvh09411
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