CVE-2019-12663 : Security Advisory and Response

Cisco IOS XE Software TrustSec Protected Access Credential Provisioning Denial of Service Vulnerability

Understanding CVE-2019-12663

This CVE involves a vulnerability in the Cisco TrustSec (CTS) Protected Access Credential (PAC) provisioning module of Cisco IOS XE Software, potentially leading to a denial of service situation.

What is CVE-2019-12663?

The vulnerability in Cisco IOS XE Software allows an attacker to remotely cause an affected device to reload, resulting in a denial of service. It stems from improper validation of attributes in RADIUS messages.

The Impact of CVE-2019-12663

The vulnerability has a CVSS base score of 6.8, indicating a medium severity issue with high availability impact. An attacker can exploit this flaw without authentication, potentially causing a device reload and denial of service.

Technical Details of CVE-2019-12663

Vulnerability Description

The vulnerability in Cisco IOS XE Software's Cisco TrustSec (CTS) PAC provisioning module allows for remote exploitation through malicious RADIUS messages, triggering a device reload and denial of service.

Affected Systems and Versions

Product: Cisco IOS XE Software
Vendor: Cisco
Versions: Unspecified

Exploitation Mechanism

Attack Complexity: High
Attack Vector: Network
Privileges Required: None
User Interaction: None
Scope: Changed
Vector String: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H

Mitigation and Prevention

Immediate Steps to Take

Apply vendor-provided patches and updates promptly to mitigate the vulnerability.
Monitor vendor advisories and security alerts for any new information or patches related to this issue.

Long-Term Security Practices

Implement network segmentation to limit the impact of potential attacks.
Regularly review and update security configurations to enhance overall network protection.

Patching and Updates

Regularly check for and apply security updates and patches provided by Cisco to address this vulnerability.