CVE-2019-1700 : What You Need to Know

A vulnerability in the management of field-programmable gate array (FPGA) ingress buffers for the Cisco Firepower 9000 Series has been identified. This vulnerability affects the Cisco Firepower 2-port 100G double-width network module, potentially leading to a denial of service (DoS) situation.

Understanding CVE-2019-1700

This CVE pertains to a specific vulnerability in the Cisco Firepower 9000 Series that could be exploited by an adjacent attacker to cause a DoS scenario.

What is CVE-2019-1700?

The vulnerability in the FPGA of the Cisco Firepower 9000 Series allows an unauthenticated adjacent attacker to induce a denial of service condition by exploiting a logic error in the FPGA's processing of input packets.

The Impact of CVE-2019-1700

The vulnerability could result in a denial of service situation, requiring manual intervention to restore normal operations. An attacker could cause a queue wedge condition on the affected device, halting the processing of additional packets on the impacted interface.

Technical Details of CVE-2019-1700

This section provides detailed technical information about the vulnerability.

Vulnerability Description

The vulnerability is a logic error in the FPGA of the Cisco Firepower 9000 Series, affecting the processing of various input packet types.

Affected Systems and Versions

Affected Product: Cisco Firepower Extensible Operating System (FXOS)
Vendor: Cisco
Affected Version: 2.2

Exploitation Mechanism

An adjacent attacker on the same subnet can exploit the vulnerability by sending a crafted sequence of input packets to a specific interface on the affected device.
Successful exploitation can lead to a queue wedge condition, halting packet processing on the impacted interface.

Mitigation and Prevention

Protecting systems from CVE-2019-1700 requires immediate steps and long-term security practices.

Immediate Steps to Take

Apply vendor-provided patches and updates promptly.
Implement network segmentation to limit the impact of potential attacks.
Monitor network traffic for any signs of exploitation.

Long-Term Security Practices

Regularly update and patch all network devices and systems.
Conduct security training for staff to raise awareness of potential threats.
Implement intrusion detection and prevention systems to detect and mitigate attacks.

Patching and Updates

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