CVE-2019-1743 : Security Advisory and Response

A security vulnerability in the web UI framework of Cisco IOS XE Software allows a remote attacker with authentication to manipulate the device's filesystem, potentially gaining elevated privileges.

Understanding CVE-2019-1743

This CVE involves an arbitrary file upload vulnerability in Cisco IOS XE Software.

What is CVE-2019-1743?

The vulnerability in Cisco IOS XE Software's web UI framework enables authenticated remote attackers to illicitly modify the device's filesystem due to inadequate input validation. By uploading a malicious file, attackers can exploit this flaw to gain higher privileges on the affected device.

The Impact of CVE-2019-1743

Successful exploitation of this vulnerability could lead to unauthorized access and control over the affected device, posing a significant security risk.

Technical Details of CVE-2019-1743

This section provides more technical insights into the CVE.

Vulnerability Description

The vulnerability arises from a lack of proper input validation in the web UI framework of Cisco IOS XE Software, allowing attackers to upload malicious files and manipulate the device's filesystem.

Affected Systems and Versions

Cisco IOS XE Software versions 16.2.1 to 16.8.1e are impacted by this vulnerability.

Exploitation Mechanism

To exploit this vulnerability, attackers need to be authenticated and can upload a harmful file to the device, potentially granting them elevated privileges.

Mitigation and Prevention

Protecting systems from CVE-2019-1743 is crucial for maintaining security.

Immediate Steps to Take

Apply patches and updates provided by Cisco promptly.
Monitor network traffic for any suspicious activities.
Restrict access to the device to authorized personnel only.

Long-Term Security Practices

Regularly update and patch all software and firmware on network devices.
Conduct security audits and assessments to identify and address vulnerabilities proactively.

Patching and Updates

Cisco has released patches to address this vulnerability. Ensure all affected systems are updated with the latest security fixes.