CVE-2017-1000063 in kitto
Summary
by MITRE
kittoframework kitto version 0.5.1 is vulnerable to an XSS in the 404 page resulting in information disclosure
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Analysis
by VulDB Data Team • 10/26/2019
The vulnerability identified as CVE-2017-1000063 affects the kittoframework kitto version 0.5.1 and represents a cross-site scripting flaw within the application's error handling mechanism. This particular vulnerability manifests in the 404 page implementation where user-supplied input is not properly sanitized or escaped before being rendered back to the browser. The flaw allows malicious actors to inject arbitrary JavaScript code through crafted requests that trigger the error page, potentially enabling unauthorized access to sensitive information and session data.
The technical exploitation of this vulnerability falls under CWE-79 which specifically addresses cross-site scripting vulnerabilities in software applications. When a user navigates to a non-existent resource within the kittoframework application, the system generates a 404 error page that incorporates the requested path or parameters without adequate input validation and output encoding. This creates an environment where an attacker can craft a malicious URL containing script tags or other malicious payloads that execute in the context of a victim's browser session. The vulnerability is particularly concerning because it leverages the application's legitimate error handling functionality to deliver malicious content, making it difficult for security monitoring systems to distinguish between benign errors and malicious attempts.
The operational impact of this vulnerability extends beyond simple information disclosure to potentially enable more sophisticated attacks such as session hijacking, credential theft, and data exfiltration. When users encounter the 404 page with improperly handled input, their browsers execute the injected scripts, which can capture cookies, redirect to malicious sites, or perform actions on behalf of the authenticated user. This represents a significant risk to user privacy and application security, particularly in environments where the kittoframework handles sensitive data or user authentication. The vulnerability demonstrates poor input sanitization practices and inadequate output encoding in web applications, creating a persistent security weakness that can be exploited across multiple user sessions.
Mitigation strategies for CVE-2017-1000063 should focus on implementing proper input validation and output encoding mechanisms throughout the application's error handling pathways. Organizations should ensure that all user-supplied data is properly escaped before being rendered in any HTML context, particularly in error pages and other non-functional responses. The recommended approach involves implementing Content Security Policy headers to limit script execution, utilizing proper HTML escaping libraries, and conducting thorough input validation to prevent malicious payloads from reaching the rendering layer. Additionally, upgrading to a patched version of kittoframework that addresses this specific vulnerability is essential, as the vulnerability resides in the application's core framework implementation. Security teams should also consider implementing web application firewalls and monitoring for suspicious patterns in error page requests that may indicate exploitation attempts, aligning with ATT&CK technique T1071.004 for application layer protocol manipulation and T1566 for credential access through social engineering attacks that could leverage this vulnerability.