CVE-2019-8929 in Netflow Analyzer Professional
Summary
by MITRE
An issue was discovered in Zoho ManageEngine Netflow Analyzer Professional 7.0.0.2. XSS exists in the Administration zone /netflow/jspui/selectDevice.jsp file in these GET parameters: param and rtype.
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Analysis
by VulDB Data Team • 06/23/2024
The vulnerability identified as CVE-2019-8929 represents a cross-site scripting flaw within Zoho ManageEngine Netflow Analyzer Professional version 7.0.0.2. This security weakness resides in the administration zone of the web application, specifically within the selectDevice.jsp file that processes user input through GET parameters. The affected parameters include 'param' and 'rtype' which are directly incorporated into the application's response without adequate sanitization or output encoding. This particular implementation exposes the application to malicious script injection attacks that could be exploited by remote attackers to execute arbitrary code within the context of a victim's browser session.
The technical nature of this vulnerability aligns with CWE-79 Cross-Site Scripting, which occurs when an application includes untrusted data in a web page without proper validation or encoding. The flaw exists because the application fails to implement proper input validation and output encoding mechanisms for the GET parameters in question. When user-supplied data flows directly into HTML output without appropriate sanitization, attackers can inject malicious scripts that will execute in the browsers of unsuspecting users who access the vulnerable page. This type of vulnerability is particularly dangerous in administrative interfaces where privileged users may be exposed to malicious payloads that could lead to complete system compromise.
The operational impact of this vulnerability extends beyond simple script execution as it provides attackers with a potential foothold for more sophisticated attacks within the network monitoring environment. Since this affects the administration zone of Netflow Analyzer, successful exploitation could allow attackers to access sensitive network flow data, manipulate monitoring configurations, or potentially escalate privileges within the system. The vulnerability affects the professional edition of the software, which typically serves organizations requiring comprehensive network traffic analysis and monitoring capabilities. Attackers could leverage this weakness to gain unauthorized access to network flow information, potentially compromising network security monitoring and analysis activities. The vulnerability is particularly concerning as it allows for persistent XSS attacks that could remain undetected for extended periods, providing attackers with ongoing access to the compromised system.
Mitigation strategies for CVE-2019-8929 should focus on immediate input validation and output encoding implementations. Organizations should implement proper parameter sanitization for all user-supplied input, particularly within administrative interfaces where such vulnerabilities pose the greatest risk. The recommended approach includes implementing strict input validation that rejects or encodes potentially dangerous characters and ensuring all output is properly encoded according to the context in which it is rendered. Additionally, implementing a Content Security Policy (CSP) header can provide an additional layer of protection against XSS attacks by restricting the sources from which scripts can be executed. Regular security assessments and penetration testing should be conducted to identify similar vulnerabilities in web applications, particularly in administrative interfaces where privilege escalation risks are higher. Organizations should also ensure that all software components are kept up to date with the latest security patches and updates provided by the vendor, as this vulnerability was likely addressed in subsequent releases of the Netflow Analyzer product. The vulnerability demonstrates the importance of following secure coding practices and adhering to the principle of least privilege in administrative interfaces to minimize the potential impact of such flaws.