CVE-2023-36641 Explained : Impact and Mitigation
Discover the impact, technical details, and mitigation strategies for CVE-2023-36641 affecting Fortinet FortiProxy and FortiOS. Learn how to prevent denial-of-service attacks.
A numeric truncation error in Fortinet FortiProxy and FortiOS allows an attacker to launch denial-of-service attacks. Find out more about the impact, technical details, and mitigation strategies related to this CVE.
Understanding CVE-2023-36641
This section covers the details of CVE-2023-36641.
What is CVE-2023-36641?
CVE-2023-36641 involves a numeric truncation error in various versions of Fortinet FortiProxy and FortiOS. This vulnerability can be exploited by an attacker to initiate denial-of-service attacks through specially crafted HTTP requests.
The Impact of CVE-2023-36641
The impact of CVE-2023-36641 is significant as it allows threat actors to disrupt services and potentially lead to downtime. The affected systems include specific versions of FortiProxy and FortiOS, leaving them vulnerable to exploitation.
Technical Details of CVE-2023-36641
Get insights into the technical aspects of CVE-2023-36641.
Vulnerability Description
The vulnerability stems from a numeric truncation error in multiple versions of FortiProxy and FortiOS. Attackers can exploit this flaw to carry out denial-of-service attacks via crafted HTTP requests.
Affected Systems and Versions
Fortinet's FortiProxy versions 7.2.0 to 7.2.4, 7.0.0 to 7.0.10, and earlier 2.0 and 1.x versions are impacted. FortiOS versions affected include 7.4.0, 7.2.0 to 7.2.5, 7.0.0 to 7.0.12, and older 6.x versions.
Exploitation Mechanism
By sending specifically crafted HTTP requests, threat actors can exploit the numeric truncation error in FortiProxy and FortiOS versions to launch denial-of-service attacks.
Mitigation and Prevention
Learn how to address and prevent CVE-2023-36641 effectively.
Immediate Steps to Take
Users are advised to upgrade to FortiSASE version 23.3.b or higher, FortiProxy version 7.2.5 or above, and FortiOS version 7.4.1 or newer to mitigate the risk of exploitation.
Long-Term Security Practices
Implement robust security measures, including monitoring network traffic, applying security patches promptly, and conducting regular security assessments, to enhance overall cybersecurity posture.
Patching and Updates
Regularly apply security updates provided by Fortinet to ensure that the systems are protected against known vulnerabilities.