CVE-2013-6900 in Garoon
Summary
by MITRE
Cross-site scripting (XSS) vulnerability in the system-administration component in Cybozu Garoon 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-2013-6900 represents a critical cross-site scripting flaw within the system-administration component of Cybozu Garoon versions prior to 3.7.0. This vulnerability classifies under CWE-79 as a failure to sanitize user input, specifically in the context of administrative interfaces where privileged access is typically required. The flaw enables remote attackers to execute arbitrary web scripts or HTML code within the browser of authenticated users who interact with the affected administrative components.
The technical nature of this vulnerability stems from insufficient input validation and output sanitization mechanisms within the system administration interface of Cybozu Garoon. Attackers can exploit this weakness through unspecified vectors that likely involve manipulation of parameters or data fields within the administrative web forms or API endpoints. The vulnerability's remote exploitability means that attackers do not require physical access to the system or local network privileges to leverage the flaw, making it particularly dangerous in environments where administrative interfaces are accessible over the internet.
The operational impact of this vulnerability extends beyond simple data theft or defacement, as it provides attackers with the capability to escalate privileges and potentially gain unauthorized access to sensitive administrative functions. When users with elevated privileges interact with the compromised administrative interface, attackers can execute malicious scripts that may steal session cookies, redirect users to phishing sites, or even modify system configurations. This represents a significant risk to organizational security posture, particularly in enterprise environments where Cybozu Garoon serves as a collaboration platform for business-critical applications.
From a threat modeling perspective, this vulnerability aligns with ATT&CK technique T1059.007 for command and scripting interpreter, specifically targeting the web application layer where attackers can establish persistent access through malicious script injection. Organizations utilizing vulnerable versions of Cybozu Garoon face increased risk of credential theft, data exfiltration, and potential lateral movement within their network infrastructure. The vulnerability particularly affects environments where administrative users regularly access the system through web browsers, creating multiple attack vectors for exploitation.
Mitigation strategies should prioritize immediate patching of affected systems to version 3.7.0 or later, which contains the necessary input validation and sanitization fixes. Organizations should implement comprehensive web application firewall rules to detect and block suspicious script injection attempts, while also conducting thorough security assessments of all administrative interfaces. Regular security training for administrators on recognizing social engineering attempts that might precede exploitation of such vulnerabilities remains crucial. Additionally, implementing proper input validation frameworks and output encoding mechanisms within the application codebase can provide defense-in-depth against similar future vulnerabilities. The remediation process should include comprehensive testing of the patched environment to ensure that the XSS vulnerability has been effectively addressed without introducing regressions in functionality.