CVE-2017-2094 in Garoon
Summary
by MITRE
Cybozu Garoon 3.0.0 to 4.2.3 allows remote authenticated attackers to bypass access restriction in Workflow and the "MultiReport" function to alter or delete information via unspecified vectors.
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Analysis
by VulDB Data Team • 12/21/2020
The vulnerability identified as CVE-2017-2094 affects Cybozu Garoon versions 3.0.0 through 4.2.3, representing a critical access control flaw that enables authenticated attackers to circumvent security restrictions within the workflow and multi-report functionalities. This issue stems from insufficient input validation and authorization checks that allow malicious users with legitimate credentials to perform unauthorized operations. The vulnerability operates at the application layer and specifically targets the workflow processing mechanisms and multi-report features that are integral components of the collaboration platform. Attackers exploiting this weakness can manipulate or remove data without proper authorization, potentially compromising the integrity and availability of business processes managed through the system.
The technical implementation of this vulnerability demonstrates a classic privilege escalation scenario where authenticated users can leverage insufficient access controls to perform administrative functions. The unspecified vectors suggest that the flaw exists within the request handling mechanisms that process workflow and multi-report operations, likely involving improper session validation or insufficient permission checks during function execution. This type of vulnerability aligns with CWE-285, which addresses improper authorization issues in software systems, and represents a significant weakness in the authorization framework of the Garoon platform. The flaw essentially allows attackers to bypass the normal security boundaries that should prevent users from accessing or modifying data they do not have explicit permissions for, particularly within workflow processes and multi-report functionalities.
The operational impact of this vulnerability extends beyond simple data manipulation to potentially disrupt business operations and compromise sensitive information. Organizations relying on Garoon for workflow automation and multi-report generation face significant risks including unauthorized modification of business processes, deletion of critical workflow data, and potential exposure of confidential information through compromised multi-report functions. The vulnerability affects the core collaborative features of the platform, potentially leading to process disruptions, data loss, and unauthorized access to business-critical information. Attackers could exploit this to alter workflow approvals, modify report data, or delete essential business process information, creating both operational and compliance risks for affected organizations.
Mitigation strategies for CVE-2017-2094 should prioritize immediate patching of affected systems to address the authorization bypass vulnerability. Organizations must ensure that all instances of Cybozu Garoon 3.0.0 through 4.2.3 are updated to versions that contain proper access control mechanisms and input validation. Network segmentation and monitoring should be implemented to detect unauthorized access attempts and anomalous behavior within workflow and multi-report functions. Additionally, implementing principle of least privilege access controls and regular security audits of workflow configurations can help minimize the impact of potential exploitation. The vulnerability also highlights the importance of proper code review processes and security testing for collaboration platforms, particularly focusing on authorization checks and input validation mechanisms that should be aligned with ATT&CK framework techniques related to privilege escalation and credential access. Organizations should also consider implementing additional logging and monitoring specifically for workflow and multi-report operations to detect potential exploitation attempts and maintain audit trails for forensic analysis.