CVE-2018-12432 in JavaMelody
Summary
by MITRE
JavaMelody through 1.60.0 has XSS via the counter parameter in a clear_counter action to the /monitoring URI.
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Analysis
by VulDB Data Team • 02/19/2020
The vulnerability CVE-2018-12432 represents a cross-site scripting flaw in JavaMelody version 1.60.0 and earlier, specifically affecting the monitoring component of the application. This issue arises from insufficient input validation and output encoding within the counter parameter handling mechanism when processing clear_counter actions through the /monitoring URI endpoint. The vulnerability allows attackers to inject malicious scripts into the application's response, potentially compromising user sessions and enabling unauthorized access to monitoring data.
The technical exploitation of this vulnerability occurs when an attacker crafts a malicious request containing specially formatted counter parameters that are not properly sanitized before being rendered in the web interface. The flaw stems from the application's failure to implement proper input validation and output encoding mechanisms, which are fundamental security controls recommended by the CWE (Common Weakness Enumeration) catalog under CWE-79 - Improper Neutralization of Input During Web Page Generation. The vulnerability specifically manifests when the application processes user-supplied counter values without adequate sanitization, allowing malicious payloads to be executed in the context of the victim's browser.
The operational impact of this vulnerability extends beyond simple script execution, as it can enable attackers to perform session hijacking, steal sensitive monitoring information, and potentially escalate privileges within the application's monitoring environment. Attackers can leverage this weakness to execute arbitrary JavaScript code in the victim's browser, potentially leading to complete compromise of user sessions and unauthorized access to system monitoring data. The vulnerability affects the monitoring functionality of JavaMelody, which is commonly used for application performance monitoring, making it particularly dangerous as it can expose critical system metrics and performance data to unauthorized parties.
Security professionals should implement immediate mitigations including input validation and output encoding for all user-supplied parameters, particularly those used in monitoring and administrative functions. The recommended approach involves implementing proper parameter sanitization and HTML escaping mechanisms before rendering any user-provided content in web responses. Organizations should also consider implementing web application firewalls and content security policies to provide additional layers of protection. This vulnerability aligns with ATT&CK techniques related to credential access and command and control operations, as it can enable attackers to establish persistent access to monitoring systems and potentially use the compromised monitoring data for further attacks. The remediation process should include upgrading to JavaMelody version 1.61.0 or later, where the XSS vulnerability has been addressed through proper input validation and output encoding implementations.