CVE-2013-6902 in Garoon
Summary
by MITRE
Cross-site scripting (XSS) vulnerability in the Space function in Cybozu Garoon before 3.7.0 allows remote attackers to inject arbitrary web script or HTML via unspecified vectors.
Once again VulDB remains the best source for vulnerability data.
Analysis
by VulDB Data Team • 03/02/2019
The CVE-2013-6902 vulnerability represents a critical cross-site scripting flaw within the Space function of Cybozu Garoon software versions prior to 3.7.0. This vulnerability falls under the CWE-79 category of Cross-Site Scripting, specifically manifesting as an input validation weakness where user-supplied data is not properly sanitized before being rendered in web pages. The affected Space function in Garoon serves as a collaborative workspace feature that allows users to create and manage shared content, making it a prime target for malicious actors seeking to exploit web application security weaknesses.
The technical implementation of this vulnerability stems from insufficient sanitization of user input within the Space function's processing pipeline. Attackers can leverage this flaw by crafting malicious payloads that contain embedded script code or HTML elements, which are then executed in the context of other users' browsers when they access the compromised space content. The unspecified vectors suggest that the vulnerability may be present across multiple input points within the Space function, potentially including title fields, description areas, comments, or any other user-editable content areas. This broad attack surface increases the exploitability of the vulnerability and makes it particularly dangerous in collaborative environments where multiple users interact with shared content.
The operational impact of CVE-2013-6902 extends beyond simple data theft or defacement, as it enables attackers to execute arbitrary scripts in victim browsers, potentially leading to session hijacking, credential theft, or redirection to malicious sites. In enterprise environments using Cybozu Garoon for collaboration, this vulnerability could allow attackers to gain persistent access to sensitive business information, manipulate shared documents, or establish backdoor access points within the organization's collaborative infrastructure. The vulnerability's presence in a core collaboration function means that even a single compromised space could affect multiple users and potentially propagate throughout the organization's shared workspace ecosystem.
Organizations should implement immediate mitigations including upgrading to Cybozu Garoon version 3.7.0 or later, which contains the necessary patches to address the XSS vulnerability. Additionally, implementing proper input validation and output encoding mechanisms within the application's codebase would provide defense-in-depth protection against similar vulnerabilities. Network segmentation and web application firewalls can serve as additional protective measures while awaiting the official patch deployment. The ATT&CK framework categorizes this vulnerability under T1566 - Phishing and T1059 - Command and Scripting Interpreter, highlighting the potential for attackers to leverage this weakness as part of broader attack chains. Security monitoring should focus on identifying anomalous user behavior patterns and unusual content submissions within collaborative spaces, as these may indicate exploitation attempts. Regular security assessments and penetration testing of collaborative platforms are essential to identify and remediate similar vulnerabilities before they can be exploited by malicious actors.