CVE-2020-3459 : Exploit Details and Defense Strategies

A vulnerability in the CLI of Cisco FXOS Software could allow an authenticated, local attacker to inject arbitrary commands with root privileges.

Understanding CVE-2020-3459

This CVE involves a command injection vulnerability in Cisco FXOS Software for Firepower 4100/9300 Series.

What is CVE-2020-3459?

The vulnerability allows a local attacker to execute commands with root privileges by injecting crafted input into affected commands.

The Impact of CVE-2020-3459

CVSS Base Score: 6.7 (Medium Severity)
Attack Vector: Local
Confidentiality Impact: High
Integrity Impact: High
Availability Impact: High
Privileges Required: High
Successful exploitation could lead to unauthorized command execution with elevated privileges.

Technical Details of CVE-2020-3459

This section provides more in-depth technical insights into the vulnerability.

Vulnerability Description

The vulnerability stems from insufficient input validation of user-supplied commands, enabling attackers to execute arbitrary commands with elevated privileges.

Affected Systems and Versions

Affected Product: Cisco Firepower Extensible Operating System (FXOS)
Affected Version: Not applicable

Exploitation Mechanism

Attackers can exploit this vulnerability by authenticating to a device and submitting specially crafted input to the affected command, leading to unauthorized command execution.

Mitigation and Prevention

Protecting systems from CVE-2020-3459 requires immediate actions and long-term security practices.

Immediate Steps to Take

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

Long-Term Security Practices

Implement the principle of least privilege to limit user access.
Regularly update and patch systems to address known vulnerabilities.

Patching and Updates

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