CVE-2019-17657 : Vulnerability Insights and Analysis

A vulnerability related to Uncontrolled Resource Consumption has been identified in Fortinet products, potentially leading to denial of service attacks.

Understanding CVE-2019-17657

This CVE involves a vulnerability in various Fortinet products that could be exploited for denial of service attacks.

What is CVE-2019-17657?

This CVE identifies an Uncontrolled Resource Consumption vulnerability in Fortinet FortiSwitch, FortiAnalyzer, FortiManager, and FortiAP-S/W2, allowing attackers to disrupt the admin webUI through specially crafted HTTP requests.

The Impact of CVE-2019-17657

Exploiting this vulnerability could result in a denial of service (DoS) attack on the admin webUI, particularly through Slow HTTP DoS Attacks.

Technical Details of CVE-2019-17657

This section provides technical insights into the vulnerability.

Vulnerability Description

The vulnerability lies in the affected Fortinet products, enabling attackers to disrupt the admin webUI through slow, fragmented HTTP requests or responses.

Affected Systems and Versions

Fortinet FortiSwitch versions below 3.6.11, 6.0.6, and 6.2.2
FortiAnalyzer version below 6.2.3
FortiManager version below 6.2.3
FortiAP-S/W2 version below 6.2.2

Exploitation Mechanism

Attackers can exploit this vulnerability by handling specially crafted HTTP requests or responses in a slow, fragmented manner, leading to a DoS on the admin webUI.

Mitigation and Prevention

Protecting systems from CVE-2019-17657 is crucial to prevent potential DoS attacks.

Immediate Steps to Take

Apply patches provided by Fortinet for the affected versions immediately.
Monitor network traffic for any suspicious activity that could indicate an ongoing attack.
Implement network segmentation to limit the impact of potential attacks.

Long-Term Security Practices

Regularly update and patch all Fortinet products to address known vulnerabilities.
Conduct security assessments and penetration testing to identify and mitigate potential weaknesses.

Patching and Updates

Fortinet has released patches for the affected versions; ensure timely installation to mitigate the vulnerability.