CVE-2015-2986 in hitSuji
Summary
by MITRE
Cross-site scripting (XSS) vulnerability in rakuto.net hitSuji (rktSNS2) 0.2.2b allows remote attackers to inject arbitrary web script or HTML via unspecified vectors.
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Analysis
by VulDB Data Team • 11/28/2017
The vulnerability identified as CVE-2015-2986 represents a critical cross-site scripting flaw within the rakuto.net hitSuji (rktSNS2) version 0.2.2b web application. This vulnerability falls under the broader category of CWE-79 - Improper Neutralization of Input During Web Page Generation, which specifically addresses the failure to properly sanitize user input before incorporating it into web page content. The flaw enables remote attackers to execute malicious scripts within the context of other users' browsers, potentially leading to session hijacking, data theft, or unauthorized actions performed on behalf of victims.
The technical nature of this vulnerability stems from inadequate input validation and output encoding mechanisms within the rktSNS2 application. When users submit content through various interface elements, the application fails to properly sanitize or encode the input data before rendering it in web pages. This allows attackers to inject malicious payloads that are then executed by unsuspecting users who view the affected content. The unspecified vectors suggest that the vulnerability could potentially exist across multiple input points within the application, including forms, URL parameters, or user-generated content fields, making the attack surface more extensive than initially apparent.
The operational impact of this vulnerability extends beyond simple script execution, as it creates a persistent threat vector that can be exploited across different user sessions and contexts. Attackers could craft malicious payloads that redirect users to phishing sites, steal authentication cookies, or manipulate application functionality to perform unauthorized actions. The remote nature of the attack means that threat actors do not require physical access to the system or direct network access to the target environment, significantly increasing the exploitability and potential damage. This vulnerability particularly affects web applications that rely on user-generated content, as it undermines the trust model between users and the application, potentially compromising the integrity of the entire platform.
Mitigation strategies for CVE-2015-2986 should focus on implementing robust input validation and output encoding practices throughout the application. The most effective approaches include implementing proper HTML escaping for all user-supplied content, utilizing Content Security Policy (CSP) headers to limit script execution, and deploying input sanitization libraries that can identify and neutralize potentially malicious content. Organizations should also consider implementing Web Application Firewalls (WAF) rules specifically designed to detect and block XSS attack patterns, while conducting regular security assessments to identify additional injection points that may be susceptible to similar vulnerabilities. The remediation process must include comprehensive code reviews to ensure that all input handling mechanisms properly validate and sanitize data before processing, aligning with security best practices outlined in the OWASP Top Ten and NIST Cybersecurity Framework guidelines.