CVE-2018-0300 : What You Need to Know

A vulnerability in the process of uploading new application images to Cisco FXOS on the Cisco Firepower 4100 Series Next-Generation Firewall (NGFW) and Firepower 9300 Security Appliance could allow an authenticated, remote attacker using path traversal techniques to create or overwrite arbitrary files on an affected device. The vulnerability is due to insufficient validation during the application image upload process. An attacker could exploit this vulnerability by creating an application image containing malicious code and installing the image on the affected device using the CLI or web-based user interface (web UI). These actions occur prior to signature verification and could allow the attacker to create and execute arbitrary code with root privileges. Note: A missing or invalid signature in the application image will cause the upload process to fail, but does not prevent the exploit. Cisco Bug IDs: CSCvc21901.

Understanding CVE-2018-0300

This section provides insights into the nature and impact of CVE-2018-0300.

What is CVE-2018-0300?

CVE-2018-0300 is a vulnerability that allows an authenticated remote attacker to exploit the process of uploading new application images on Cisco Firepower 4100 Series NGFW and Firepower 9300 Security Appliance, potentially leading to arbitrary file creation or overwriting.

The Impact of CVE-2018-0300

The vulnerability enables attackers to execute arbitrary code with root privileges on the affected device, compromising its security and integrity.

Technical Details of CVE-2018-0300

Explore the technical aspects of CVE-2018-0300.

Vulnerability Description

Attackers can exploit inadequate validation during the application image upload process to create or overwrite files on the device.

Affected Systems and Versions

Cisco Firepower 4100 Series Next-Generation Firewall and Firepower 9300 Security Appliance (unknown versions).

Exploitation Mechanism

Attackers use path traversal techniques to upload malicious code within an application image, granting them root privileges.

Mitigation and Prevention

Learn how to mitigate the risks associated with CVE-2018-0300.

Immediate Steps to Take

Apply vendor-supplied patches promptly.
Monitor network traffic for signs of exploitation.
Restrict access to vulnerable systems.

Long-Term Security Practices

Regularly update and patch all software and firmware.
Conduct security training for employees to recognize and report suspicious activities.

Patching and Updates

Stay informed about security advisories and updates from Cisco.