CVE-2018-0134 : Exploit Details and Defense Strategies

A vulnerability in the RADIUS authentication module of Cisco Policy Suite allows an unauthenticated remote attacker to determine the validity of a subscriber's username, potentially leading to further system attacks.

Understanding CVE-2018-0134

An issue has been discovered in the RADIUS authentication module of Cisco Policy Suite, enabling a remote attacker to verify the validity of a subscriber's username.

What is CVE-2018-0134?

The vulnerability arises from the RADIUS server component of Cisco Policy Suite generating distinct failure messages for authentication attempts based on the legitimacy of usernames. Attackers can analyze these messages to infer valid usernames, facilitating subsequent attacks.

The Impact of CVE-2018-0134

This vulnerability could allow unauthorized access to sensitive subscriber information and lead to potential system compromise if exploited by malicious actors.

Technical Details of CVE-2018-0134

The technical aspects of the vulnerability in Cisco Policy Suite.

Vulnerability Description

The RADIUS authentication module of Cisco Policy Suite allows remote attackers to determine valid subscriber usernames through distinct failure messages.

Affected Systems and Versions

Product: Cisco Policy Suite
Version: Cisco Policy Suite

Exploitation Mechanism

Attackers can analyze failure messages to identify valid subscriber usernames, potentially launching subsequent attacks.

Mitigation and Prevention

Steps to mitigate and prevent exploitation of CVE-2018-0134.

Immediate Steps to Take

Implement network segmentation to limit access to critical systems.
Monitor network traffic for any suspicious activity related to RADIUS authentication.

Long-Term Security Practices

Regularly update and patch Cisco Policy Suite to address known vulnerabilities.
Conduct security training for employees to enhance awareness of social engineering attacks.

Patching and Updates

Apply patches and updates provided by Cisco to address the vulnerability in the RADIUS authentication module of Cisco Policy Suite.