#VU12786 Improper certificate validation in Cisco Identity Services Engine (ISE) - CVE-2018-0277
Published: May 17, 2018
Vulnerability identifier: #VU12786
Vulnerability risk: Low
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2018-0277
CWE-ID: CWE-295
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
Cisco Identity Services Engine (ISE)
Cisco Identity Services Engine (ISE)
Software vendor:
Cisco Systems, Inc
Cisco Systems, Inc
Description
The vulnerability allows a remote unauthenticated attacker to cause DoS condition on the target system.
The weakness exists in the Extensible Authentication Protocol-Transport Layer Security (EAP-TLS) certificate validation during EAP authentication due to incomplete input validation of the client EAP-TLS certificate. A remote attacker can initiate EAP authentication over TLS to the ISE with a specially crafted EAP-TLS certificate and cause the service to crash.
The weakness exists in the Extensible Authentication Protocol-Transport Layer Security (EAP-TLS) certificate validation during EAP authentication due to incomplete input validation of the client EAP-TLS certificate. A remote attacker can initiate EAP authentication over TLS to the ISE with a specially crafted EAP-TLS certificate and cause the service to crash.
Remediation
Update to version 2.2(0.905).