CVE-2016-7817 in Keitai Chat
Summary
by MITRE
Cross-site scripting vulnerability in Simple keitai chat 2.0 and earlier allows remote attackers to inject arbitrary web script or HTML via unspecified vectors.
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Analysis
by VulDB Data Team • 10/15/2019
The CVE-2016-7817 vulnerability represents a critical cross-site scripting flaw identified in Simple keitai chat version 2.0 and earlier implementations. This vulnerability falls under the category of web application security weaknesses that enable malicious actors to execute unauthorized scripts within the context of a victim's browser session. The vulnerability stems from insufficient input validation and output encoding mechanisms within the application's data processing pipeline, creating an attack surface where user-supplied data can be manipulated to inject malicious content.
The technical exploitation of this vulnerability occurs through unspecified vectors that likely involve user input fields or parameters that are not properly sanitized before being rendered in web pages. Attackers can craft malicious payloads that, when processed by the vulnerable application, get executed in the browsers of other users who view the affected content. This type of vulnerability is particularly dangerous because it allows for persistent or reflected XSS attacks, where the malicious script can be stored on the server or injected into web pages that are subsequently viewed by other users.
From an operational impact perspective, this vulnerability compromises the integrity and confidentiality of user data within the Simple keitai chat environment. An attacker could potentially steal session cookies, redirect users to malicious websites, deface web pages, or execute arbitrary commands on behalf of authenticated users. The vulnerability affects the application's ability to maintain secure communication channels and can lead to unauthorized access to sensitive information, particularly in environments where users might be accessing the chat system from corporate networks or personal devices with valuable data.
The vulnerability aligns with CWE-79, which specifically addresses Cross-Site Scripting flaws in software applications, and can be mapped to ATT&CK technique T1059.007 for scripting languages and T1566 for phishing attacks that leverage XSS vulnerabilities. Organizations utilizing Simple keitai chat systems would be exposed to potential data breaches, service disruption, and reputational damage if this vulnerability remains unpatched. The attack surface extends beyond simple script injection to include potential privilege escalation and lateral movement within network environments where the application is deployed.
Mitigation strategies for CVE-2016-7817 should focus on implementing comprehensive input validation and output encoding mechanisms throughout the application's data flow. Developers should employ proper sanitization techniques for all user inputs and ensure that any data rendered in web contexts is properly escaped to prevent script execution. The most effective solution involves upgrading to a patched version of Simple keitai chat that addresses the XSS vulnerability, while also implementing additional security measures such as Content Security Policy headers, regular security code reviews, and input validation frameworks. Organizations should also consider implementing web application firewalls and monitoring systems to detect and prevent exploitation attempts. Regular vulnerability assessments and security training for development teams are essential to prevent similar issues in future implementations and maintain overall application security posture.