CVE-2019-1695 : What You Need to Know

A weakness in the detection mechanism of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software allows unauthorized attackers to transmit data directly to the core of affected devices.

Understanding CVE-2019-1695

This vulnerability enables attackers to bypass Layer 2 (L2) filters and send crafted packets to the management interface of affected devices.

What is CVE-2019-1695?

The vulnerability arises from inadequate filtering of Ethernet frames, allowing attackers to send data to the core of affected devices.

The Impact of CVE-2019-1695

Attackers can exploit the vulnerability to send data directly to the kernel of affected devices.
Successful exploitation can lead to the generation of specific syslog entries on targeted devices.

Technical Details of CVE-2019-1695

This section provides detailed technical information about the vulnerability.

Vulnerability Description

The vulnerability allows nearby unauthorized attackers to bypass L2 filters and transmit data directly to the core of affected devices.

Affected Systems and Versions

Cisco Adaptive Security Appliance (ASA) Software versions less than 9.8.4, 9.9.2.50, and 9.10.1.17 are affected.
Cisco Firepower Threat Defense (FTD) Software versions less than 6.2.3.12 and 6.3.0.3 are affected.

Exploitation Mechanism

Attackers can send carefully crafted packets to the management interface of affected devices to exploit the vulnerability.

Mitigation and Prevention

Protecting systems from CVE-2019-1695 requires immediate steps and long-term security practices.

Immediate Steps to Take

Apply vendor-recommended patches and updates promptly.
Monitor network traffic for any suspicious activity.
Implement strong network segmentation to limit the impact of potential attacks.

Long-Term Security Practices

Regularly update and patch all software and firmware on network devices.
Conduct security audits and penetration testing to identify and address vulnerabilities.

Patching and Updates

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