CVE-2022-3844 in Webmin
Summary
by MITRE • 11/03/2022
A vulnerability, which was classified as problematic, was found in Webmin. Affected is an unknown function of the file xterm/index.cgi. The manipulation leads to basic cross site scripting. It is possible to launch the attack remotely. The name of the patch is d3d33af3c0c3fd3a889c84e287a038b7a457d811. It is recommended to apply a patch to fix this issue. VDB-212862 is the identifier assigned to this vulnerability.
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Analysis
by VulDB Data Team • 01/26/2023
The vulnerability identified as CVE-2022-3844 represents a critical cross-site scripting flaw within the Webmin administrative interface that has significant implications for system security and remote exploitation capabilities. This vulnerability specifically affects the xterm/index.cgi component of Webmin, a widely used web-based system administration tool that allows administrators to manage various server functions through a graphical interface. The issue resides in an unknown function within this particular file, making it particularly concerning as it may not be immediately apparent to administrators and security teams who are monitoring for known vulnerabilities. The vulnerability classification as "problematic" indicates that it poses substantial risk to systems running affected versions of Webmin, particularly given the nature of the flaw and its potential for remote exploitation.
The technical execution of this cross-site scripting vulnerability occurs through manipulation of input parameters within the xterm/index.cgi file, allowing attackers to inject malicious scripts that execute in the context of other users' browsers. This type of vulnerability falls under CWE-79 which specifically addresses Cross-Site Scripting flaws, where improper validation or sanitization of user input enables attackers to inject client-side scripts into web applications. The remote exploitation capability means that an attacker does not require physical access to the system or local network connectivity to launch the attack, significantly expanding the potential attack surface and making the vulnerability particularly dangerous for publicly accessible Webmin installations. The vulnerability can be leveraged to steal session cookies, perform unauthorized actions on behalf of users, or redirect victims to malicious websites, all of which can lead to complete system compromise.
The operational impact of CVE-2022-3844 extends beyond simple script execution as it represents a fundamental breach in the security model of Webmin's administrative interface. When exploited successfully, this vulnerability could allow attackers to gain unauthorized access to administrative functions, potentially leading to full system compromise, data exfiltration, or the installation of persistent backdoors. The xterm/index.cgi component typically provides terminal access functionality within Webmin's interface, making it a valuable target for attackers seeking to escalate privileges or establish persistent access to the underlying system. The remote nature of the attack means that organizations with publicly accessible Webmin installations face immediate risk, while those with internal deployments may still be vulnerable to attacks from compromised internal systems or through lateral movement techniques. This vulnerability directly impacts the principle of least privilege and can undermine the security posture of entire networks that rely on Webmin for system administration tasks.
The recommended mitigation strategy involves applying the provided patch identified by the commit hash d3d33af3c0c3fd3a889c84e287a038b7a457d811, which represents the official fix developed by Webmin developers to address the specific cross-site scripting flaw. Organizations should prioritize patching this vulnerability immediately, particularly those running Webmin versions that are susceptible to this attack vector. The patching process should be conducted as part of a comprehensive security maintenance routine, including testing in non-production environments to ensure compatibility with existing configurations and applications. System administrators should also consider implementing additional security controls such as web application firewalls, input validation mechanisms, and regular security audits of their Webmin installations. This vulnerability aligns with ATT&CK technique T1059.007 which covers the use of scripting languages for execution, and T1566 which addresses social engineering through malicious payloads, both of which can be facilitated by successful cross-site scripting attacks. Organizations should also monitor for any related vulnerabilities in Webmin's ecosystem and consider implementing network segmentation to limit the potential impact of successful exploitation attempts, as this vulnerability can serve as a stepping stone for more extensive attacks within compromised networks.