CVE-2022-42472 : Vulnerability Insights and Analysis

A improper neutralization of crlf sequences in http headers ('http response splitting') in Fortinet FortiOS versions 7.2.0 through 7.2.2, 7.0.0 through 7.0.8, 6.4.0 through 6.4.11, 6.2.0 through 6.2.12, 6.0.0 through 6.0.16, FortiProxy 7.2.0 through 7.2.1, 7.0.0 through 7.0.7, 2.0.0 through 2.0.10, 1.2.0 through 1.2.13, 1.1.0 through 1.1.6 may allow an authenticated and remote attacker to perform an HTTP request splitting attack which gives attackers control of the remaining headers and body of the response.

Understanding CVE-2022-42472

This section provides insights into the impact, technical details, and mitigation strategies related to CVE-2022-42472.

What is CVE-2022-42472?

CVE-2022-42472 involves an improper neutralization of crlf sequences in http headers ('http response splitting') that affects various versions of Fortinet FortiOS and FortiProxy. This vulnerability can be exploited by authenticated remote attackers to manipulate HTTP responses.

The Impact of CVE-2022-42472

The vulnerability could allow attackers to perform HTTP request splitting attacks, gaining control over response headers and body. This could lead to unauthorized access or manipulation of sensitive information within the HTTP response.

Technical Details of CVE-2022-42472

Let's delve into the technical aspects of CVE-2022-42472 for a better understanding.

Vulnerability Description

The vulnerability arises from the improper neutralization of crlf sequences in http headers, opening the door for HTTP response splitting attacks.

Affected Systems and Versions

Fortinet FortiOS versions 7.2.0 through 7.2.2, 7.0.0 through 7.0.8, 6.4.0 through 6.4.11, 6.2.0 through 6.2.12, 6.0.0 through 6.0.16, along with FortiProxy versions 7.2.0 through 7.2.1, 7.0.0 through 7.0.7, 2.0.0 through 2.0.10, and 1.2.0 through 1.2.13 are affected by this vulnerability.

Exploitation Mechanism

An authenticated and remote attacker can exploit this vulnerability by injecting crafted HTTP requests to split responses and potentially gain control over the response contents.

Mitigation and Prevention

Understanding the mitigation steps and best practices can help safeguard systems from CVE-2022-42472.

Immediate Steps to Take

Users are advised to upgrade to the following versions or above:

FortiProxy version 7.2.2
FortiProxy version 7.0.8
FortiProxy version 2.0.11
FortiOS version 7.2.3
FortiOS version 7.0.9

Long-Term Security Practices

Implementing secure coding practices, performing regular security audits, and staying informed about security updates can enhance the overall security posture.

Patching and Updates

Regularly apply security patches and updates provided by Fortinet to address known vulnerabilities and enhance system security.