CVE-2017-2092 in Garoon
Summary
by MITRE
Cross-site scripting vulnerability in Cybozu Garoon 3.0.0 to 4.2.3 allows remote authenticated attackers to inject arbitrary web script or HTML via unspecified vectors.
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Analysis
by VulDB Data Team • 12/21/2020
The vulnerability identified as CVE-2017-2092 represents a critical cross-site scripting flaw within Cybozu Garoon versions 3.0.0 through 4.2.3, demonstrating a fundamental weakness in web application security that enables malicious actors to execute unauthorized code within user browsers. This vulnerability specifically affects authenticated users who interact with the Garoon collaboration platform, creating a significant risk for organizations relying on this software for business communications and document management. The issue stems from inadequate input validation and output encoding mechanisms that fail to properly sanitize user-supplied data before rendering it within web pages, allowing attackers to inject malicious scripts that can persist and execute in the context of other users' sessions.
The technical nature of this vulnerability aligns with CWE-79, which categorizes cross-site scripting as a code injection flaw occurring when untrusted data is improperly incorporated into web pages without adequate validation, escaping, or encoding. Attackers can exploit this weakness by crafting malicious payloads that leverage the application's trust in authenticated users, potentially gaining access to sensitive information, modifying data, or performing actions on behalf of victims. The unspecified vectors suggest that multiple input points within the application may be susceptible to this type of injection, including but not limited to form fields, URL parameters, or API endpoints that process user-generated content. This broad attack surface increases the likelihood of successful exploitation and makes comprehensive remediation more challenging for system administrators.
The operational impact of CVE-2017-2092 extends beyond simple script execution, as it can enable attackers to perform session hijacking, steal authentication tokens, redirect users to malicious sites, or extract confidential information from the application's user base. Organizations using affected versions of Garoon face potential data breaches, service disruption, and compliance violations that could result in significant financial and reputational damage. The vulnerability's classification under the ATT&CK framework would likely map to techniques such as T1059.007 for scripting and T1566 for social engineering, as attackers could craft convincing phishing campaigns that leverage the XSS capability to establish persistent access. The authenticated nature of the attack means that attackers do not require privileged accounts to exploit the vulnerability, making it particularly dangerous in environments where users may have elevated permissions within the application.
Mitigation strategies for this vulnerability should prioritize immediate application of vendor patches and updates to versions that address the XSS flaws through proper input sanitization and output encoding mechanisms. Organizations must implement comprehensive security monitoring to detect potential exploitation attempts and establish robust content security policies that limit script execution within the application environment. The remediation process should include thorough code review of input handling routines, implementation of strict validation controls, and regular security testing to identify similar vulnerabilities in other components of the system. Additionally, security awareness training for users can help mitigate the risk of social engineering attacks that might leverage this vulnerability, while network segmentation and access controls can limit the potential damage from successful exploitation attempts.