CVE-2022-30708 : Security Advisory and Response

Webmin through 1.991, utilizing the Authentic theme, is susceptible to remote code execution, allowing attackers to exploit manual user creation. The vulnerability lies in the improper file parameter restriction within settings-editor_write.cgi.

Understanding CVE-2022-30708

This section will delve into the specifics of CVE-2022-30708, shedding light on its impact, technical details, and mitigation strategies.

What is CVE-2022-30708?

The CVE-2022-30708 vulnerability in Webmin version 1.991 enables remote code execution when a manual user is created, providing attackers a window to exploit settings-editor_write.cgi.

The Impact of CVE-2022-30708

With a CVSS base score of 8.8, CVE-2022-30708 poses a high risk, impacting confidentiality, integrity, and availability. Attackers can execute remote code with low privileges, necessitating prompt mitigation measures.

Technical Details of CVE-2022-30708

Let's explore the technical aspects, affected systems, and exploitation mechanisms of CVE-2022-30708.

Vulnerability Description

The vulnerability stems from the lack of proper file parameter restrictions in settings-editor_write.cgi, facilitating remote code execution when a user is manually created in Webmin.

Affected Systems and Versions

Webmin versions up to 1.991, particularly when employing the Authentic theme, are vulnerable to CVE-2022-30708, potentially allowing malicious actors to compromise systems.

Exploitation Mechanism

Attackers can exploit this vulnerability remotely via network access, leveraging a low attack complexity to achieve high impact on confidentiality, integrity, and availability.

Mitigation and Prevention

Protecting systems against CVE-2022-30708 requires a swift response and long-term security practices.

Immediate Steps to Take

Immediately update Webmin to version 1.992 or later to patch the vulnerability and prevent potential remote code execution. Ensure users are created only through Virtualmin or Cloudmin to mitigate risks.

Long-Term Security Practices

Enforce the principle of least privilege, conduct regular security assessments, and educate users on secure practices to enhance overall system security.

Patching and Updates

Stay informed about security patches and updates released by Webmin. Regularly apply security patches, keeping systems up-to-date to defend against emerging threats.