CVE-2018-7405 in EventLog Analyzer
Summary
by MITRE
Cross-site scripting (XSS) in Zoho ManageEngine EventLog Analyzer before 11.12 Build 11120 allows remote attackers to inject arbitrary web script or HTML via unspecified vectors.
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Analysis
by VulDB Data Team • 03/26/2020
The vulnerability identified as CVE-2018-7405 represents a critical cross-site scripting flaw within Zoho ManageEngine EventLog Analyzer version 11.12 Build 11120 and earlier. This security weakness falls under the broader category of input validation failures that enable malicious actors to execute unauthorized code within the context of a victim's browser session. The vulnerability is classified as a CWE-79: Improper Neutralization of Input During Web Page Generation, which specifically addresses the failure to properly sanitize user-supplied data before incorporating it into web pages. The affected system processes user inputs without adequate sanitization mechanisms, creating an attack surface where malicious scripts can be injected and subsequently executed by other users who view the compromised content.
The technical exploitation of this vulnerability occurs through unspecified attack vectors that likely involve the manipulation of input fields or parameters within the EventLog Analyzer web interface. Attackers can craft malicious payloads that are then stored or processed by the application and subsequently delivered to unsuspecting users. The vulnerability's impact extends beyond simple script execution as it can enable session hijacking, credential theft, and the potential for privilege escalation within the affected environment. This type of vulnerability aligns with the ATT&CK technique T1059.001 - Command and Scripting Interpreter: PowerShell, where attackers leverage web-based scripting capabilities to extend their attack surface and maintain persistence. The flaw allows for the injection of arbitrary web script or HTML content, which can include malicious JavaScript, iframe tags, or other HTML elements that can manipulate the victim's browser behavior.
From an operational perspective, the exploitation of this vulnerability can have severe consequences for organizations relying on Zoho ManageEngine EventLog Analyzer for security monitoring and log management. The compromised system can serve as a stepping stone for more sophisticated attacks, including data exfiltration, lateral movement within the network, and establishment of persistent backdoors. The vulnerability affects the integrity and confidentiality of the security monitoring infrastructure, potentially allowing attackers to manipulate log data or hide their activities from detection systems. Organizations may experience service disruption, data loss, and regulatory compliance violations if attackers successfully exploit this vulnerability. The attack vector typically involves social engineering elements where users are tricked into clicking malicious links or visiting compromised web pages that contain the malicious scripts.
Organizations should immediately implement mitigations including patching to the latest version of Zoho ManageEngine EventLog Analyzer that addresses this vulnerability, as well as implementing comprehensive input validation and output encoding mechanisms. The recommended approach involves deploying web application firewalls that can detect and block malicious script injection attempts, implementing content security policies to restrict script execution, and conducting regular security assessments to identify potential input validation gaps. Additional defensive measures include user education programs to recognize suspicious links and content, network segmentation to limit the attack surface, and monitoring for unusual script execution patterns. The vulnerability demonstrates the importance of maintaining up-to-date security patches and implementing defense-in-depth strategies that combine multiple security controls to protect against various attack vectors. Regular vulnerability assessments and penetration testing should be conducted to identify similar weaknesses in the application's input handling mechanisms, ensuring that the security posture remains robust against evolving threats.