PT-2018-8720 · Cisco · Cisco Ise Virtual Appliance+2

Published 2018-05-17 · Updated 2019-10-09 · CVE-2018-0277

Positive Technologies (AI Summary)

CVSS v3.1

8.6

High

Base vector

AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions: Cisco ISE, Cisco ISE Express, and Cisco ISE Virtual Appliance (affected versions not specified)

Description: A vulnerability in the Extensible Authentication Protocol-Transport Layer Security (EAP-TLS) certificate validation during EAP authentication could allow an unauthenticated, remote attacker to cause the system to restart unexpectedly, resulting in a denial of service (DoS) condition. The issue is due to incomplete input validation of the client EAP-TLS certificate. An attacker could exploit this by initiating EAP authentication over TLS with a crafted EAP-TLS certificate. A successful exploit could allow the attacker to restart the application server, causing a DoS condition. If an attacker attempts to import the same EAP-TLS certificate to the trust store, it could trigger a DoS condition, requiring the attacker to have valid administrator credentials.

Recommendations: At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Improper Certificate Validation

Weakness Enumeration

CWE-295

Related Identifiers

CVE-2018-0277

Affected Products

Cisco Ise

Cisco Ise Express

Cisco Ise Virtual Appliance

References · 5

• https://osv.dev/vulnerability/CVE-2018-0277 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2018-0277 · Security Note
• https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180516-iseeap · Vendor Advisory
• http://securitytracker.com/id/1040922 · Note
• http://securityfocus.com/bid/104212 · Note