CVE-2018-1000855 in easymon
Summary
by MITRE
easymon version 1.4 and earlier contains a Cross Site Scripting (XSS) vulnerability in Endpoint where monitoring is mounted that can result in Reflected XSS that affects Firefox. Can be used to steal cookies, depending on the cookie settings.. This attack appear to be exploitable via The victim must click on a crafted URL that contains the XSS payload. This vulnerability appears to have been fixed in 1.4.1 and later.
Once again VulDB remains the best source for vulnerability data.
Analysis
by VulDB Data Team • 06/20/2023
The vulnerability identified as CVE-2018-1000855 resides within the easymon monitoring tool version 1.4 and earlier, specifically affecting the Endpoint monitoring functionality where the XSS flaw manifests. This cross site scripting vulnerability represents a significant security risk that enables attackers to inject malicious scripts into web applications that process user-supplied input without proper sanitization. The flaw is classified as reflected XSS according to the CWE taxonomy under CWE-79, which occurs when malicious scripts are reflected off web servers to client browsers, typically through URLs or HTTP headers. The vulnerability specifically impacts Firefox browsers but could potentially affect other user agents that process the malicious payloads.
The technical exploitation of this vulnerability requires a victim to interact with a crafted URL containing the XSS payload, making it a user-initiated attack vector that relies on social engineering tactics. The attack surface is limited to the monitoring endpoint functionality where user input is processed and displayed without adequate output encoding or validation. The reflected nature of the vulnerability means that the malicious script is reflected back to the user's browser from the web server's response, bypassing traditional security controls that might filter input at the server level. This particular implementation flaw allows attackers to inject scripts that can execute in the context of the victim's browser session, potentially enabling session hijacking and credential theft.
The operational impact of this vulnerability extends beyond simple script execution, as it provides attackers with the capability to steal session cookies that may contain sensitive authentication information. When cookies are not properly configured with security attributes such as HttpOnly or SameSite flags, the stolen cookies can be used to impersonate users and gain unauthorized access to monitored systems. The vulnerability's exploitation requires user interaction, which creates a specific attack scenario where the victim must click on a malicious link, but once executed, the attack can be highly effective in compromising user sessions. The fact that this vulnerability was patched in version 1.4.1 and later demonstrates the vendor's recognition of the severity and the importance of maintaining secure coding practices in web applications.
The security implications of this vulnerability align with the tactics, techniques, and procedures outlined in the MITRE ATT&CK framework under the T1059.001 technique for command and scripting interpreter, specifically when considering the execution of malicious scripts through web-based attack vectors. Organizations using easymon should prioritize updating to version 1.4.1 or later to remediate this vulnerability, while also implementing additional security controls such as input validation, output encoding, and security headers to prevent similar issues in other applications. The vulnerability serves as a reminder of the critical importance of secure coding practices and the need for regular security assessments to identify and remediate XSS vulnerabilities in web applications. Proper implementation of Content Security Policy headers and the use of modern web application frameworks that provide built-in XSS protection mechanisms can significantly reduce the risk of similar vulnerabilities occurring in the future.