CVE-2019-1830 : What You Need to Know

Cisco Wireless LAN Controller Locally Significant Certificate Denial of Service Vulnerability

Understanding CVE-2019-1830

This CVE involves a vulnerability in the management of the Cisco Wireless LAN Controller's Locally Significant Certificate (LSC), potentially leading to a denial of service (DoS) attack.

What is CVE-2019-1830?

The vulnerability in the Cisco Wireless LAN Controller allows an authenticated attacker with valid administrator credentials to exploit the LSC management flaw, causing the device to restart unexpectedly, resulting in a DoS situation.

The Impact of CVE-2019-1830

The vulnerability could be exploited by an attacker to trigger unexpected device restarts, leading to denial of service. The CVSS base score is 4.9, indicating a medium severity issue with high availability impact.

Technical Details of CVE-2019-1830

The technical aspects of this CVE are as follows:

Vulnerability Description

Incorrect input validation of the HTTP URL for LSC Certificate Authority connection
Requires authentication on the targeted device to configure an LSC certificate

Affected Systems and Versions

Product: Cisco Wireless LAN Controller (WLC)
Vendor: Cisco
Version: 8.3

Exploitation Mechanism

Attacker needs valid administrator credentials
Exploitation involves configuring an LSC certificate to trigger device restart

Mitigation and Prevention

Steps to address and prevent exploitation of CVE-2019-1830:

Immediate Steps to Take

Apply vendor-provided patches and updates
Monitor network for any unusual restarts or DoS conditions

Long-Term Security Practices

Implement strong authentication measures to prevent unauthorized access
Regularly review and update security configurations

Patching and Updates

Regularly check for security advisories from Cisco
Apply recommended patches promptly to mitigate the vulnerability