CVE-2020-3299 : Exploit Details and Defense Strategies

Multiple Cisco products are affected by a vulnerability in the Snort detection engine that could allow an unauthenticated, remote attacker to bypass a configured File Policy for HTTP.

Understanding CVE-2020-3299

This CVE involves a vulnerability in the Snort detection engine in multiple Cisco products that could enable an attacker to bypass configured File Policy for HTTP packets.

What is CVE-2020-3299?

The vulnerability in the Snort detection engine allows an attacker to bypass a configured File Policy for HTTP by sending crafted HTTP packets through an affected device.

The Impact of CVE-2020-3299

If successfully exploited, this vulnerability could allow an attacker to deliver a malicious payload by bypassing the configured File Policy for HTTP packets.

Technical Details of CVE-2020-3299

The following are the technical details of CVE-2020-3299:

Vulnerability Description

The vulnerability is a result of incorrect detection of modified HTTP packets used in chunked responses.

Affected Systems and Versions

Vendor: Cisco
Product: Cisco Firepower Threat Defense Software
Versions Affected: Not Applicable

Exploitation Mechanism

An unauthenticated, remote attacker can exploit the vulnerability by sending crafted HTTP packets through an affected device.

Mitigation and Prevention

Steps to address and prevent the CVE-2020-3299 vulnerability:

Immediate Steps to Take

Apply the necessary security updates provided by Cisco.
Monitor Cisco's security advisories for any further updates or patches.

Long-Term Security Practices

Regularly update and patch all software and systems to prevent vulnerabilities.
Implement network segmentation and access controls to limit the impact of potential attacks.
Conduct regular security assessments and audits to identify and address any security gaps.

Patching and Updates

Refer to Cisco's security advisory for specific patching instructions and updates.