CVE-2017-12300 : What You Need to Know

A security weakness has been identified in the SNORT detection engine of Cisco Firepower System Software, potentially allowing unauthorized remote attackers to bypass certain file policies.

Understanding CVE-2017-12300

This CVE involves a vulnerability in the SNORT detection engine of Cisco Firepower System Software that could be exploited by attackers to bypass security measures.

What is CVE-2017-12300?

The vulnerability allows attackers to bypass a file policy blocking the SMB2 protocol by sending a customized SMB2 transfer request through the targeted device.

The Impact of CVE-2017-12300

Unauthorized remote attackers can exploit the vulnerability to bypass filters blocking SMB2 traffic.
Successful exploitation could lead to the unauthorized access of systems.

Technical Details of CVE-2017-12300

This section provides detailed technical information about the vulnerability.

Vulnerability Description

The flaw arises from the incorrect identification of an SMB2 file based on its length, enabling attackers to bypass security measures.

Affected Systems and Versions

Product: Cisco Firepower System Software
Versions: Cisco Firepower System Software

Exploitation Mechanism

Attackers exploit the vulnerability by sending a crafted SMB2 transfer request through the targeted device.

Mitigation and Prevention

Steps to address and prevent the exploitation of CVE-2017-12300.

Immediate Steps to Take

Apply patches and updates provided by Cisco.
Monitor network traffic for any suspicious activity related to SMB2.

Long-Term Security Practices

Regularly update and patch all software and systems.
Implement network segmentation to limit the impact of potential attacks.

Patching and Updates

Ensure that the latest security updates and patches from Cisco are applied promptly.