CVE-2019-1835 : What You Need to Know

A vulnerability in the CLI of Cisco Aironet Access Points (APs) could allow an authenticated, local attacker to access sensitive information stored in an AP. This flaw arises from inadequate validation of user-inputted data in certain CLI commands.

Understanding CVE-2019-1835

This CVE involves a directory traversal vulnerability in Cisco Aironet Access Points software versions 8.8 and 8.9.

What is CVE-2019-1835?

The vulnerability allows a local attacker with authenticated access to exploit the CLI of Cisco Aironet APs, potentially leading to unauthorized access to confidential data stored within the AP.

The Impact of CVE-2019-1835

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

Technical Details of CVE-2019-1835

This section provides detailed technical information about the vulnerability.

Vulnerability Description

The flaw results from improper sanitization of user-supplied input in specific CLI commands, allowing an attacker to perform directory traversal and access system files on the affected device.

Affected Systems and Versions

Affected Software Versions: 8.8, 8.9

Exploitation Mechanism

To exploit this vulnerability, an attacker must gain access to the CLI of a targeted AP with administrator privileges and execute specifically crafted commands that lead to directory traversal.

Mitigation and Prevention

Protecting systems from CVE-2019-1835 requires immediate actions and long-term security practices.

Immediate Steps to Take

Apply vendor-provided patches or updates promptly.
Restrict access to the CLI to authorized personnel only.
Monitor and audit CLI commands for unusual activities.

Long-Term Security Practices

Regularly update and patch all software and firmware.
Implement strong authentication mechanisms for CLI access.
Conduct security training for administrators on best practices.
Employ network segmentation to limit the impact of potential breaches.
Stay informed about security advisories and best practices.

Patching and Updates

Ensure that all affected systems are updated with the latest patches provided by Cisco to mitigate the vulnerability.