CVE-2019-1758 : Security Advisory and Response

Cisco IOS Software Catalyst 6500 Series 802.1x Authentication Bypass Vulnerability

Understanding CVE-2019-1758

This CVE involves a weakness in the 802.1x feature of Cisco IOS Software on Catalyst 6500 Series Switches, potentially allowing unauthorized network access.

What is CVE-2019-1758?

The vulnerability in Cisco IOS Software enables an adjacent attacker to gain network access without authentication by exploiting the 802.1x feature.

The Impact of CVE-2019-1758

The vulnerability could lead to unauthorized network access for attackers, compromising network security and potentially allowing for intermittent network infiltration.

Technical Details of CVE-2019-1758

The technical aspects of the vulnerability are as follows:

Vulnerability Description

The weakness lies in the 802.1x function of Cisco IOS Software on Catalyst 6500 Series Switches.
Unauthorized adjacent attackers can exploit this vulnerability to access the network before authentication.

Affected Systems and Versions

Product: Cisco IOS Software
Vendor: Cisco
Affected Version: 12.2(60)EZ12

Exploitation Mechanism

Attack Complexity: Low
Attack Vector: Adjacent Network
Base Score: 4.7 (Medium Severity)
Integrity Impact: Low
Privileges Required: None
Scope: Changed

Mitigation and Prevention

Steps to address and prevent the CVE-2019-1758 vulnerability:

Immediate Steps to Take

Apply vendor-provided patches or updates promptly.
Implement network segmentation to limit the impact of potential unauthorized access.

Long-Term Security Practices

Regularly monitor network traffic for any suspicious activity.
Conduct security audits and assessments to identify and address vulnerabilities proactively.

Patching and Updates

Stay informed about security advisories from Cisco and apply relevant patches as soon as they are available.