CVE-2019-1805 : What You Need to Know

A vulnerability in the Secure Shell (SSH) server used in Cisco Wireless LAN Controller (WLC) Software could allow unauthorized access to the Command Line Interface (CLI) on affected devices.

Understanding CVE-2019-1805

This CVE identifies a flaw in access control methods for the SSH server in Cisco WLC Software, potentially enabling unauthorized CLI access.

What is CVE-2019-1805?

The vulnerability stems from inadequate validation of incoming SSH connections, allowing attackers in close proximity to gain CLI access on affected devices.

The Impact of CVE-2019-1805

Attackers within proximity could exploit the flaw to access CLI on compromised devices.
Successful exploitation could lead to unauthorized access and subsequent attacks.

Technical Details of CVE-2019-1805

This section delves into the technical aspects of the vulnerability.

Vulnerability Description

The flaw in SSH server access control mechanisms could be exploited by attackers to gain unauthorized CLI access on affected Cisco WLC devices.

Affected Systems and Versions

Product: Cisco Wireless LAN Controller (WLC)
Vendor: Cisco
Vulnerable Version: < 8.5(140.0)

Exploitation Mechanism

Attack Complexity: Low
Attack Vector: Adjacent Network
Base Score: 5.4 (Medium Severity)
Privileges Required: None
Exploitation involves establishing an SSH connection to the compromised controller.

Mitigation and Prevention

Protecting systems from CVE-2019-1805 requires immediate actions and long-term security practices.

Immediate Steps to Take

Update affected systems to version 8.5(140.0) or higher to mitigate the vulnerability.
Monitor network traffic for any suspicious SSH connection attempts.

Long-Term Security Practices

Implement network segmentation to limit the impact of potential unauthorized access.
Regularly review and update access control policies for SSH connections.

Patching and Updates

Apply security patches provided by Cisco to address the vulnerability.