CVE-2018-0277 Details

CVE-2018-0277

Published: 2018-05-17
Last Modified: 2019-10-09
CVE Author: NIST National Vulnerability Database
CVE Assigner: psirt@cisco.com
Summary

A vulnerability in the Extensible Authentication Protocol-Transport Layer Security (EAP-TLS) certificate validation during EAP authentication for the Cisco Identity Services Engine (ISE) could allow an unauthenticated, remote attacker to cause the ISE application server to restart unexpectedly, causing a denial of service (DoS) condition on an affected system. The vulnerability is due to incomplete input validation of the client EAP-TLS certificate. An attacker could exploit this vulnerability by initiating EAP authentication over TLS to the ISE with a crafted EAP-TLS certificate. A successful exploit could allow the attacker to restart the ISE application server, resulting in a DoS condition on the affected system. The ISE application could continue to restart while the client attempts to establish the EAP authentication connection. If an attacker attempted to import the same EAP-TLS certificate to the ISE trust store, it could trigger a DoS condition on the affected system. This exploit vector would require the attacker to have valid administrator credentials. The vulnerability affects Cisco ISE, Cisco ISE Express, and Cisco ISE Virtual Appliance. Cisco Bug IDs: CSCve31857.

Analysis
Common Vulnerability Score System v2.0
Severity Medium
Base Score 5/10
Exploit Score 10/10
Access Vector Network
Access Complexity Low
Authentication None
Impact Score 2.9/10
Confidentiality Impact None
Availability Impact Partial
Integrity Impact None
Vector String AV:N/AC:L/Au:N/C:N/I:N/A:P
Common Vulnerability Score System v3.1
Severity High
Base Score 8.6/10
Exploit Score 3.9/10
Access Vector Network
Access Complexity Low
Privileges Required None
Impact Score 4/10
Confidentiality Impact None
Availability Impact High
Integrity Impact None
Scope Changed
User Interaction None
Vector String CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
Products Reported
CPE Vulnerable Start Excluding
cpe:2.3:a:cisco:identity_services_engine:2.0\(0.306\):*:*:*: Yes - -
cpe:2.3:a:cisco:identity_services_engine:2.0\(1.130\):*:*:*: Yes - -
cpe:2.3:a:cisco:identity_services_engine:2.1\(0.474\):*:*:*: Yes - -
cpe:2.3:a:cisco:identity_services_engine:2.2\(0.470\):*:*:*: Yes - -
References

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180516-
http://www.securitytracker.com/id/1040922
http://www.securityfocus.com/bid/104212

CVE ID
CVE-2018-0277
Published
2018-05-17
Modified
2019-10-09
CVSSv2.0
Medium
CVSSv3.1
High
PCI Compliance
Pass
US-CERT Alert
No
CWE
CWE-295

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