CVE-2017-20120 in Server
Summary
by MITRE • 06/29/2022
A vulnerability classified as problematic was found in TrueConf Server 4.3.7. This vulnerability affects unknown code of the file /admin/service/stop/. The manipulation leads to cross-site request forgery. The attack can be initiated remotely. The exploit has been disclosed to the public and may be used.
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Analysis
by VulDB Data Team • 03/24/2023
This vulnerability resides within TrueConf Server version 4.3.7 and represents a cross-site request forgery flaw that manifests in the administrative service endpoint at /admin/service/stop/. The issue stems from insufficient validation of incoming requests to this critical administrative function, allowing malicious actors to craft forged requests that could execute unauthorized operations within the server's administrative context. The vulnerability's classification as problematic indicates a significant security risk that could compromise the integrity and availability of the conferencing system's administrative functions.
The technical implementation of this CSRF vulnerability occurs when the server fails to properly verify the origin of requests targeting the service stop functionality. Attackers can exploit this weakness by tricking authenticated users into visiting malicious web pages that automatically submit requests to the vulnerable endpoint. The attack vector is remote, meaning no physical access or local network presence is required for exploitation. This allows threat actors to potentially disrupt service availability, terminate legitimate conference sessions, or execute unauthorized administrative commands through carefully crafted cross-site requests that appear to originate from legitimate administrative sessions.
The operational impact of this vulnerability extends beyond simple service disruption as it could enable attackers to gain unauthorized control over critical conferencing infrastructure. When an authenticated administrator visits a malicious site, their browser automatically submits a request to stop the service, potentially causing service interruptions that affect multiple users and conference participants. The public disclosure of this exploit increases the likelihood of real-world attacks, particularly targeting organizations that rely on TrueConf Server for their communication infrastructure, making it a particularly dangerous vulnerability for enterprise environments.
Organizations using TrueConf Server 4.3.7 should immediately implement mitigations including input validation controls, CSRF token implementation, and proper request origin verification mechanisms. The implementation of anti-CSRF tokens within the administrative interface would prevent unauthorized requests from being processed successfully. Network segmentation and access controls should be enhanced to limit exposure of administrative endpoints to untrusted networks. Additionally, organizations should consider implementing web application firewalls to detect and block suspicious requests targeting the vulnerable endpoint. This vulnerability aligns with CWE-352, which specifically addresses Cross-Site Request Forgery issues, and represents a clear violation of the principle of least privilege in web application security. The attack pattern follows typical CSRF exploitation techniques documented in the MITRE ATT&CK framework under the privilege escalation and defense evasion categories, making it a significant concern for security operations centers monitoring for such threats.