CVE-2021-4046 in GIM
Summary
by MITRE • 02/11/2022
The m_txtNom y m_txtCognoms parameters in TCMAN GIM v8.01 allow an attacker to perform persistent XSS attacks. This vulnerability could be used to carry out a number of browser-based attacks including browser hijacking or theft of sensitive data.
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Analysis
by VulDB Data Team • 02/17/2022
The vulnerability identified as CVE-2021-4046 affects TCMAN GIM version 8.01 and represents a critical cross-site scripting flaw within the application's parameter handling mechanisms. This issue specifically targets the m_txtNom and m_txtCognoms parameters, which are likely used for processing user input related to name and surname fields within the system's interface. The vulnerability classifies under CWE-79 as a failure to sanitize or validate user-provided input, creating an environment where malicious scripts can be injected and executed within the context of legitimate user sessions.
The technical exploitation of this vulnerability occurs through the manipulation of the m_txtNom and m_txtCognoms parameters, which are processed without adequate sanitization or encoding measures. When these parameters contain malicious script code, the application fails to properly escape or validate the input before rendering it in web responses. This allows attackers to inject persistent cross-site scripting payloads that can be stored within the application's database or session management system. The persistent nature of this vulnerability means that once injected, the malicious scripts will execute automatically whenever the affected page is loaded, making it particularly dangerous for long-term exploitation.
From an operational perspective, this vulnerability creates significant risk for both the application and its users. Attackers can leverage this flaw to perform browser hijacking by redirecting users to malicious websites or installing unwanted browser extensions. The vulnerability also enables sensitive data theft, as attackers can capture session cookies, authentication tokens, or other confidential information transmitted by users. The impact extends beyond individual user compromise to potentially affect the entire application ecosystem, as successful exploitation could lead to privilege escalation, data exfiltration, or further lateral movement within the network. This vulnerability directly maps to several ATT&CK techniques including T1566 for credential access through social engineering and T1059 for command and scripting interpreter execution.
The mitigation strategies for CVE-2021-4046 must address both immediate remediation and long-term security improvements. Organizations should implement comprehensive input validation and output encoding mechanisms for all user-provided parameters, particularly those used in form fields and query strings. The application should employ proper HTML escaping and context-appropriate encoding before rendering any user input in web responses. Additionally, implementing a content security policy can provide an additional layer of protection against script execution. Security patches should be applied immediately to update TCMAN GIM to versions that address this vulnerability, while also conducting thorough code reviews to identify similar input handling issues throughout the application. Regular security testing including automated scanning and manual penetration testing should be implemented to detect and remediate similar vulnerabilities before they can be exploited in production environments.