CVE-2017-2093 in Garoon
Summary
by MITRE
Cybozu Garoon 3.0.0 to 4.2.3 allow remote attackers to obtain tokens used for CSRF protection via unspecified vectors.
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Analysis
by VulDB Data Team • 12/21/2020
The vulnerability identified as CVE-2017-2093 affects Cybozu Garoon versions 3.0.0 through 4.2.3, representing a critical security flaw that undermines the application's cross-site request forgery protection mechanisms. This issue exposes the system to remote attack vectors where malicious actors can extract authentication tokens that are typically used to prevent unauthorized actions from being executed on behalf of authenticated users. The unspecified nature of the attack vectors suggests that the vulnerability may manifest through multiple exploitation techniques, making it particularly concerning for security professionals tasked with defending against such threats.
The technical flaw lies within the insufficient protection of CSRF tokens within the Garoon application framework, which operates as a collaboration platform for business communications and document management. These tokens are designed to ensure that requests originate from legitimate users and not from malicious third parties attempting to hijack sessions or perform unauthorized operations. The vulnerability allows attackers to obtain these tokens through unspecified methods that bypass the intended security controls, effectively neutralizing the CSRF protection that should prevent unauthorized actions from being executed within the context of authenticated sessions. This weakness creates a pathway for attackers to potentially execute unauthorized commands or access sensitive data without proper authentication.
The operational impact of this vulnerability extends beyond simple information disclosure, as it fundamentally compromises the integrity of the authentication system within the Garoon platform. Attackers who successfully obtain these CSRF tokens can potentially impersonate legitimate users and perform actions such as creating new user accounts, modifying existing records, deleting documents, or accessing confidential business information. The severity is amplified by the fact that the vulnerability affects multiple versions of the software, indicating a persistent flaw in the application's security architecture that could have been exploited for extended periods. Organizations relying on Garoon for business collaboration and document management face significant risks including data breaches, unauthorized access to sensitive corporate information, and potential regulatory compliance violations.
Mitigation strategies for CVE-2017-2093 should prioritize immediate software updates to versions that address the CSRF token exposure issue, as this represents the most direct solution to the vulnerability. Organizations should implement additional security controls including enhanced monitoring of authentication token usage, implementation of more robust session management practices, and deployment of web application firewalls to detect and prevent exploitation attempts. Security teams should conduct comprehensive assessments of their Garoon deployments to identify any potential exploitation that may have already occurred, and establish incident response procedures specifically tailored to address CSRF token compromise scenarios. The vulnerability aligns with CWE-352, which specifically addresses cross-site request forgery, and represents a critical threat that maps to ATT&CK technique T1566.001 for credential access through social engineering, though the specific exploitation vector in this case involves direct token extraction rather than social engineering approaches. Organizations should also consider implementing multi-factor authentication as an additional protective layer and establish regular security audits to identify similar vulnerabilities in other applications within their infrastructure.