CVE-2017-20114 in Server
Summary
by MITRE • 06/29/2022
A vulnerability has been found in TrueConf Server 4.3.7 and classified as problematic. This vulnerability affects unknown code of the file /admin/conferences/get-all-status/. The manipulation of the argument keys[] leads to basic cross site scripting (Reflected). 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 exists in TrueConf Server version 4.3.7 and represents a reflected cross-site scripting flaw that could be exploited by remote attackers. The vulnerability is located within the administrative interface at the endpoint /admin/conferences/get-all-status/ where the application fails to properly sanitize user input. The specific flaw occurs when processing the keys[] parameter which is used to retrieve conference status information, allowing malicious actors to inject arbitrary JavaScript code that will execute in the context of authenticated administrators.
The technical implementation of this vulnerability falls under CWE-79 which defines improper neutralization of input during web page generation, specifically addressing reflected cross-site scripting conditions. Attackers can craft malicious URLs containing script payloads within the keys[] parameter that, when processed by the server, get reflected back to the victim's browser without proper sanitization or encoding. This creates a persistent vector for executing malicious code in the context of the victim's session, potentially allowing full administrative access to the conference management system.
The operational impact of this vulnerability is significant as it enables remote code execution capabilities against the administrative interface. An attacker who can successfully exploit this vulnerability gains the ability to manipulate conference data, potentially access sensitive user information, modify system configurations, or even establish persistent access to the server through the compromised administrative account. The reflected nature of the vulnerability means that the attack can be delivered through various vectors including phishing emails, malicious web pages, or social engineering campaigns that direct administrators to maliciously crafted URLs.
The vulnerability's disclosure to the public increases the risk profile significantly as it provides attackers with detailed information about the exploit mechanism and target system. This particular flaw affects the administrative functionality of TrueConf Server, making it particularly dangerous as it could be used to escalate privileges from regular user to system administrator level access. Organizations running this version of TrueConf Server should implement immediate mitigations including input validation, output encoding, and access controls to prevent unauthorized exploitation of this vulnerability.
Security controls should focus on implementing proper parameter validation and sanitization for all user-supplied inputs, particularly those used in administrative interfaces. The implementation of Content Security Policy headers can help mitigate the impact of successful XSS attempts by restricting script execution. Additionally, regular security updates and patches should be applied to ensure that known vulnerabilities are addressed. This vulnerability demonstrates the importance of secure coding practices and proper input validation in web applications, particularly those handling administrative functions that require elevated privileges. Organizations should also implement network segmentation and monitor for suspicious access patterns that could indicate exploitation attempts.