CVE-2017-3806 Explained : Impact and Mitigation

Cisco Firepower 4100 Series Next-Generation Firewall and Cisco Firepower 9300 Security Appliance are affected by a vulnerability that allows authenticated local attackers to inject arbitrary shell commands. This weakness could lead to the execution of unauthorized commands on the device.

Understanding CVE-2017-3806

This CVE involves a vulnerability in the CLI command processing of Cisco Firepower 4100 Series Next-Generation Firewall and Cisco Firepower 9300 Security Appliance.

What is CVE-2017-3806?

This vulnerability enables authenticated local attackers to inject arbitrary shell commands, granting them the ability to execute unauthorized commands on the affected device.

The Impact of CVE-2017-3806

The vulnerability allows attackers to execute arbitrary shell commands, potentially leading to unauthorized access, data theft, or further compromise of the affected system.

Technical Details of CVE-2017-3806

The technical aspects of the CVE.

Vulnerability Description

The weakness in CLI command processing permits authenticated local attackers to inject arbitrary shell commands, which are then executed by the device.

Affected Systems and Versions

Affected Products: Cisco Firepower 4100 Series Next-Generation Firewall and Cisco Firepower 9300 Security Appliance 2.0(1.68)

Exploitation Mechanism

Attackers need to be authenticated and located locally to exploit this vulnerability.
By injecting malicious shell commands, attackers can execute unauthorized actions on the device.

Mitigation and Prevention

Protecting systems from CVE-2017-3806.

Immediate Steps to Take

Update the affected systems to the fixed releases: 2.0(1.118), 2.1(1.47), 92.1(1.1646), 92.1(1.1763), or 92.2(1.101).
Monitor for any unauthorized activities on the network.

Long-Term Security Practices

Implement the principle of least privilege to restrict user access.
Regularly review and update security policies and configurations.

Patching and Updates

Apply security patches and updates provided by Cisco to address the vulnerability.