CVE-2022-26156 Explained : Impact and Mitigation

An issue was discovered in the web application in Cherwell Service Management (CSM) 10.2.3 where injection of a malicious payload within the RelayState= parameter of the HTTP request body can lead to form action hijacking. This vulnerability allows attackers to modify the action URL of a form.

Understanding CVE-2022-26156

This CVE highlights a form-action hijacking vulnerability in Cherwell Service Management (CSM) 10.2.3 that can be exploited through injection of malicious payloads.

What is CVE-2022-26156?

CVE-2022-26156 is a security vulnerability found in Cherwell Service Management (CSM) 10.2.3 that allows attackers to hijack form actions by injecting a malicious payload into the RelayState= parameter of the HTTP request body.

The Impact of CVE-2022-26156

The impact of this CVE is the potential for an attacker to manipulate the action URL of an HTML form, redirecting users to the attacker's server by constructing a malicious URL.

Technical Details of CVE-2022-26156

This section delves into the technical aspects of the vulnerability.

Vulnerability Description

The vulnerability arises from the improper handling of user-supplied input in the action URL of an HTML form, enabling attackers to control and modify the form's action URL.

Affected Systems and Versions

Cherwell Service Management (CSM) 10.2.3 is specifically affected by this vulnerability.

Exploitation Mechanism

By injecting a malicious payload into the RelayState= parameter of the HTTP request body, attackers can exploit this vulnerability to hijack form actions.

Mitigation and Prevention

To address CVE-2022-26156, immediate steps can be taken along with long-term security practices.

Immediate Steps to Take

Update Cherwell Service Management (CSM) to the latest version that contains a fix for this vulnerability.
Implement strict input validation mechanisms to prevent injection attacks.

Long-Term Security Practices

Regular security audits and code reviews to identify and address vulnerabilities promptly.
Educating developers and users on secure coding practices and potential threats.

Patching and Updates

Apply patches provided by Cherwell Service Management (CSM) promptly to mitigate the risk of exploitation.