CVE-2013-6916 in Garoon
Summary
by MITRE
Cross-site scripting (XSS) vulnerability in the Yahoo! User Interface Library in Cybozu Garoon before 3.7.2, when Internet Explorer 9 or 10 or Chrome is used, allows remote attackers to inject arbitrary web script or HTML via unspecified vectors.
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Analysis
by VulDB Data Team • 03/02/2019
The CVE-2013-6916 vulnerability represents a critical cross-site scripting flaw within the Yahoo! User Interface Library component of Cybozu Garoon software versions prior to 3.7.2. This vulnerability specifically impacts web browsers including Internet Explorer 9 and 10 as well as Chrome browsers, creating a significant security risk for organizations utilizing this collaboration platform. The flaw enables remote attackers to execute malicious scripts within the context of legitimate user sessions, potentially compromising user data and system integrity. The vulnerability stems from insufficient input validation and output encoding mechanisms within the UI library, which fails to properly sanitize user-supplied data before rendering it in web pages.
The technical exploitation of this XSS vulnerability occurs through unspecified attack vectors that leverage browser-specific rendering behaviors in the targeted web browsers. When users interact with vulnerable Garoon applications, malicious input can be injected into web pages without proper sanitization, allowing attackers to execute arbitrary JavaScript code in the victim's browser context. This type of vulnerability falls under CWE-79, which specifically addresses Cross-Site Scripting flaws in software applications. The vulnerability's impact is amplified by the widespread use of Internet Explorer 9 and 10, which were prevalent browser versions at the time of the vulnerability disclosure, and the fact that Chrome browsers also remain susceptible to the same attack vectors.
The operational impact of CVE-2013-6916 extends beyond simple script injection, as successful exploitation can lead to session hijacking, data theft, privilege escalation, and potential full system compromise. Attackers can leverage this vulnerability to steal user authentication tokens, access sensitive corporate data, redirect users to malicious sites, or inject malware into user browsers. The vulnerability particularly affects collaborative environments where users frequently interact with web-based applications, making it a significant concern for enterprise security. Organizations using Cybozu Garoon without the patched version 3.7.2 face substantial risk of credential theft and unauthorized data access through this XSS vector.
Mitigation strategies for this vulnerability primarily involve immediate application of the vendor-provided patch to upgrade to Cybozu Garoon version 3.7.2 or later, which addresses the input validation and output encoding deficiencies. Organizations should also implement comprehensive input sanitization measures, including the deployment of web application firewalls and content security policies to prevent malicious script execution. Network-level protections such as browser security headers and strict content security policies can provide additional defense-in-depth measures. Security teams should conduct thorough vulnerability assessments of their web applications and implement proper output encoding practices to prevent similar issues in custom applications. This vulnerability demonstrates the importance of maintaining up-to-date software components and implementing robust security controls as outlined in the ATT&CK framework's application security categories, particularly focusing on preventing code injection attacks and maintaining secure coding practices throughout the software development lifecycle.