CVE-2022-3709 : Exploit Details and Defense Strategies

A stored XSS vulnerability in the Webadmin import group wizard of Sophos Firewall releases older than version 19.5 GA allows admin to super-admin privilege escalation.

Understanding CVE-2022-3709

This CVE involves a critical stored XSS vulnerability in Sophos Firewall releases prior to version 19.5 GA, potentially leading to privilege escalation.

What is CVE-2022-3709?

CVE-2022-3709 refers to a stored XSS vulnerability that enables an attacker with admin privileges to escalate to super-admin status in Sophos Firewall releases older than version 19.5 GA.

The Impact of CVE-2022-3709

Exploitation of this vulnerability can result in unauthorized access to sensitive information, modification, or disruption of services within affected systems, posing a significant security risk.

Technical Details of CVE-2022-3709

This section covers specific technical aspects of the CVE.

Vulnerability Description

The vulnerability allows an attacker with admin access to execute malicious scripts in the Webadmin import group wizard, leading to privilege escalation to super-admin status.

Affected Systems and Versions

Sophos Firewall versions less than 19.5 GA, 19.0 MR2, and 18.5 MR5 are affected by this vulnerability.

Exploitation Mechanism

The attacker needs admin privileges to exploit this vulnerability by executing malicious scripts within the Webadmin import group wizard, facilitating privilege escalation.

Mitigation and Prevention

Here are the necessary steps to mitigate the risk associated with CVE-2022-3709.

Immediate Steps to Take

Upgrade Sophos Firewall to version 19.5 GA or newer to address the vulnerability.
Monitor system logs for any suspicious activity or unauthorized access attempts.

Long-Term Security Practices

Implement the principle of least privilege within the organization, limiting admin and super-admin access to necessary personnel only.
Regularly update and patch Sophos Firewall systems to protect against known vulnerabilities.

Patching and Updates

Stay informed about security advisories from Sophos and promptly apply patches and updates to ensure the mitigation of known vulnerabilities.