CVE-2020-3514 : Exploit Details and Defense Strategies

A vulnerability in the multi-instance feature of Cisco Firepower Threat Defense (FTD) Software could allow an authenticated, local attacker to escape the container for their Cisco FTD instance and execute commands with root privileges in the host namespace.

Understanding CVE-2020-3514

This CVE involves a security flaw in Cisco Firepower Threat Defense Software that enables an attacker to break out of the container and run commands with elevated privileges on the host system.

What is CVE-2020-3514?

The vulnerability in Cisco Firepower Threat Defense Software allows an authenticated attacker to escape the container and execute commands with root privileges in the host namespace by exploiting insufficiently protected configuration files.

The Impact of CVE-2020-3514

The vulnerability poses a high impact, with a CVSS base score of 8.2, affecting confidentiality, integrity, and availability. An attacker could potentially impact other running instances or the host device.

Technical Details of CVE-2020-3514

This section delves into the technical aspects of the vulnerability.

Vulnerability Description

The flaw arises from inadequate protections in a configuration file used during container startup, enabling an attacker to modify specific container configuration files on the underlying file system.

Affected Systems and Versions

Product: Cisco Firepower Threat Defense Software
Vendor: Cisco
Version: Not applicable

Exploitation Mechanism

The attacker needs valid credentials on the device to exploit the vulnerability by manipulating container configuration files, allowing them to execute commands with root privileges in the host namespace.

Mitigation and Prevention

Protecting systems from CVE-2020-3514 requires immediate actions and long-term security practices.

Immediate Steps to Take

Apply vendor-provided patches or updates promptly.
Monitor for any unauthorized access or suspicious activities.

Long-Term Security Practices

Implement the principle of least privilege to restrict access rights for users and applications.
Regularly review and update security configurations to address emerging threats.

Patching and Updates

Regularly check for security advisories from Cisco and apply patches or updates to mitigate the vulnerability effectively.