CVE-2013-6907 in Garoon
Summary
by MITRE
Cross-site scripting (XSS) vulnerability in a mail component in Cybozu Garoon 2.x and 3.x before 3.7.0 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 vulnerability identified as CVE-2013-6907 represents a critical cross-site scripting flaw within the mail component of Cybozu Garoon versions 2.x and 3.x prior to 3.7.0. This vulnerability falls under the CWE-79 category of Cross-Site Scripting, which is classified as a fundamental web application security weakness that allows attackers to inject malicious scripts into web pages viewed by other users. The affected mail component in Garoon serves as a communication hub for enterprise users, making this vulnerability particularly dangerous as it could compromise the entire user base within an organization. The unspecified vectors suggest that the attack surface is broad, potentially encompassing various input fields, message headers, or content processing pathways within the mail handling system.
The technical nature of this vulnerability stems from inadequate input validation and output encoding mechanisms within the mail component's processing logic. When users receive or compose emails through the affected Garoon versions, the system fails to properly sanitize user-supplied data before rendering it in web interfaces. This allows attackers to craft malicious email messages containing script tags or other HTML elements that execute in the context of other users' browsers. The vulnerability's impact extends beyond simple script execution as it can enable session hijacking, credential theft, or redirection to malicious websites. Attackers could exploit this weakness by sending specially crafted emails that, when opened by victims, would execute malicious code in their browsers and potentially compromise their access to corporate email systems and associated resources.
The operational impact of CVE-2013-6907 is significant for organizations relying on Cybozu Garoon for their email and collaboration services. Enterprises using affected versions face potential data breaches, unauthorized access to sensitive communications, and possible escalation to broader network compromises. The vulnerability's remote exploitability means that attackers do not require physical access to the network or system to carry out attacks, making it particularly concerning for organizations with limited security monitoring capabilities. Organizations may experience disruption to their communication services, potential compliance violations due to data exposure, and reputational damage from successful attacks. The widespread use of Cybozu Garoon in enterprise environments increases the likelihood of coordinated attacks targeting multiple organizations simultaneously, creating cascading security risks across industries.
Mitigation strategies for this vulnerability primarily focus on immediate remediation through the installation of the vendor-provided patch version 3.7.0 or later. Organizations should implement comprehensive input validation measures and ensure all user-supplied data is properly encoded before being rendered in web interfaces. Network segmentation and web application firewalls can provide additional layers of protection while awaiting patch deployment. Security teams should conduct thorough vulnerability assessments of their email infrastructure and monitor for potential exploitation attempts. The ATT&CK framework categorizes this vulnerability under the T1059.007 technique for Scripting, specifically targeting web-based execution through browser-based attacks. Organizations should also consider implementing user education programs to recognize suspicious email content and establish incident response procedures for potential exploitation of XSS vulnerabilities in their email systems.