CVE-2019-15262 : Vulnerability Insights and Analysis

Cisco Wireless LAN Controller Secure Shell Denial of Service Vulnerability

Understanding CVE-2019-15262

This CVE involves a vulnerability in Cisco Wireless LAN Controller (WLC) Software that allows unauthorized attackers to disrupt device functioning through a denial of service (DoS) attack.

What is CVE-2019-15262?

The flaw in the Secure Shell (SSH) session management of Cisco WLC Software enables attackers to cause a DoS condition by improperly deleting the SSH process upon connection termination.

The Impact of CVE-2019-15262

Attack Complexity: Low
Attack Vector: Network
Availability Impact: High
Base Score: 8.6 (High Severity)
Scope: Changed
No Confidentiality or Integrity Impact
No Privileges Required
User Interaction: None

Technical Details of CVE-2019-15262

The technical aspects of this vulnerability are as follows:

Vulnerability Description

The vulnerability arises from the improper deletion of the SSH process when a connection to the device is terminated, allowing attackers to exhaust system resources through multiple SSH connections.

Affected Systems and Versions

Product: Cisco Wireless LAN Controller (WLC)
Vendor: Cisco
Versions: Unspecified

Exploitation Mechanism

Attackers exploit the vulnerability by repeatedly establishing SSH connections with an affected device, leading to a DoS situation.

Mitigation and Prevention

Steps to address and prevent exploitation of CVE-2019-15262:

Immediate Steps to Take

Monitor SSH connections for unusual activity
Implement network segmentation to limit SSH access
Apply vendor-recommended patches or updates

Long-Term Security Practices

Regularly update and patch software and firmware
Conduct security assessments and audits
Train staff on cybersecurity best practices

Patching and Updates

Apply the latest security patches provided by Cisco
Keep WLC Software up to date to mitigate the vulnerability