CVE-2022-40634 : Exploit Details and Defense Strategies

A vulnerability in Crafter Studio of Crafter CMS allows authenticated developers to execute OS commands via FreeMarker SSTI.

Understanding CVE-2022-40634

This CVE involves an Improper Control of Dynamically-Managed Code Resources vulnerability in Crafter Studio, affecting Crafter CMS versions up to 3.1.22.

What is CVE-2022-40634?

CVE-2022-40634 refers to a security flaw in Crafter Studio that permits authenticated developers to run OS commands through FreeMarker SSTI, posing a risk to the integrity, availability, and confidentiality of the system.

The Impact of CVE-2022-40634

The impact of this vulnerability is assessed as MEDIUM with a CVSS base score of 6.4. The attack complexity is high, requiring network access, and privileges are also necessitated for successful exploitation.

Technical Details of CVE-2022-40634

This section delves into the specific technical aspects of the CVE.

Vulnerability Description

The vulnerability arises due to improper control of dynamically-managed code resources within Crafter Studio, leading to the execution of unauthorized OS commands.

Affected Systems and Versions

Crafter CMS versions with a value of 3.1.22 or lower are impacted by this vulnerability.

Exploitation Mechanism

Authenticated developers can exploit this vulnerability by injecting malicious OS commands via FreeMarker SSTI, granting them unauthorized access to the system.

Mitigation and Prevention

To address and prevent the risks associated with CVE-2022-40634, the following steps are recommended.

Immediate Steps to Take

Update Crafter CMS to a version that includes a patch addressing the vulnerability.
Regularly monitor for any unauthorized system access or abnormal activities.

Long-Term Security Practices

Implement strict access controls to limit developer permissions and reduce the risk of unauthorized actions.
Educate developers on secure coding practices and the risks associated with code injections.

Patching and Updates

Regularly apply security patches released by Crafter Software to ensure that known vulnerabilities are promptly addressed.