CVE-2019-15266 Explained : Impact and Mitigation

A vulnerability in the Cisco Wireless LAN Controller (WLC) Software CLI allows an authenticated local attacker to access restricted system files through improper input sanitization.

Understanding CVE-2019-15266

This CVE involves a path traversal vulnerability in Cisco Wireless LAN Controller (WLC) Software.

What is CVE-2019-15266?

The vulnerability allows an attacker to access system files with restricted access through the CLI by exploiting inadequate input sanitization.

The Impact of CVE-2019-15266

Confidentiality Impact: High
Integrity Impact: None
Privileges Required: High
CVSS Base Score: 4.4 (Medium Severity)

Technical Details of CVE-2019-15266

The technical aspects of the vulnerability are as follows:

Vulnerability Description

The vulnerability arises from insufficient sanitization of user input in command-line parameters specifying filenames, enabling directory traversal attacks.

Affected Systems and Versions

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

Exploitation Mechanism

Attackers can exploit this vulnerability by using directory traversal techniques to specify a file path, gaining unauthorized access to sensitive system files.

Mitigation and Prevention

Steps to address and prevent exploitation of CVE-2019-15266:

Immediate Steps to Take

Apply vendor-provided patches or updates promptly.
Implement strong access controls and user permissions.
Monitor system files for unauthorized access.

Long-Term Security Practices

Regularly update and patch software to address vulnerabilities.
Conduct security training to educate users on safe CLI practices.
Employ intrusion detection systems to detect unusual file access patterns.

Patching and Updates

Cisco has likely released patches or updates to address this vulnerability. Ensure systems are updated to the latest version to mitigate the risk of exploitation.