CVE-2016-4907 in Garoon
Summary
by MITRE
Cybozu Garoon 3.0.0 to 4.2.2 allow remote attackers to obtain CSRF tokens via unspecified vectors.
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Analysis
by VulDB Data Team • 12/26/2020
The vulnerability identified as CVE-2016-4907 affects Cybozu Garoon versions 3.0.0 through 4.2.2, representing a critical security flaw that exposes the application to cross-site request forgery attacks. This issue stems from insufficient protection mechanisms around CSRF token handling, allowing malicious actors to potentially extract these security tokens through unspecified attack vectors. The vulnerability directly impacts the integrity of the application's authentication and authorization processes, as CSRF tokens serve as essential protective measures against unauthorized actions performed on behalf of authenticated users. Organizations utilizing these versions of Garoon face significant risks including unauthorized administrative actions, data manipulation, and potential system compromise through exploitation of this weakness.
The technical nature of this vulnerability falls under CWE-352, which specifically addresses Cross-Site Request Forgery weaknesses in software applications. This classification indicates that the flaw resides in the application's failure to properly validate the origin of requests, particularly those involving state-changing operations. The unspecified vectors mentioned in the description suggest that attackers could potentially exploit multiple pathways to obtain CSRF tokens, including through manipulated web forms, crafted HTTP requests, or by leveraging other application vulnerabilities that might expose token values. The vulnerability's impact extends beyond simple data theft, as CSRF tokens are typically used to prevent unauthorized modifications to user accounts, system configurations, or sensitive data within the application environment.
From an operational perspective, this vulnerability presents substantial risk to organizations relying on Cybozu Garoon for collaboration and workflow management. Attackers who successfully obtain CSRF tokens could perform unauthorized actions such as creating new user accounts, modifying existing user permissions, accessing restricted data, or executing administrative functions without proper authorization. The remote nature of the attack vector means that exploitation can occur from anywhere on the internet, requiring no physical access to the target network or application infrastructure. This vulnerability particularly affects environments where users interact with the application through web browsers, making it especially dangerous in corporate settings where the application handles sensitive business data and user management functions.
The mitigation strategies for CVE-2016-4907 primarily focus on immediate remediation through software updates to versions that address the CSRF token handling flaw. Organizations should prioritize upgrading to patched versions of Cybozu Garoon as soon as possible, as this represents the most effective solution to eliminate the vulnerability. Additionally, implementing proper input validation and request origin verification mechanisms can provide temporary protection while awaiting official patches. Security teams should conduct thorough assessments of their current deployment to identify any potential exploitation attempts and monitor network traffic for suspicious patterns related to CSRF token extraction. The implementation of additional security controls such as web application firewalls and enhanced session management practices can further reduce the risk surface. Organizations should also review their security policies and user training programs to ensure that staff understand the importance of CSRF protection and recognize potential indicators of such attacks. The vulnerability demonstrates the critical importance of maintaining up-to-date security patches and implementing robust application security controls, particularly for collaboration platforms that handle sensitive organizational data and user access management functions.