CVE-2024-31403 in Garoon
Summary
by MITRE • 06/11/2024
Incorrect authorization vulnerability in Cybozu Garoon 5.0.0 to 6.0.0 allows a remote authenticated attacker to alter and/or obtain the data of Memo.
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Analysis
by VulDB Data Team • 05/29/2025
The vulnerability identified as CVE-2024-31403 represents a critical authorization flaw within Cybozu Garoon versions 5.0.0 through 6.0.0 that exposes sensitive memo data to unauthorized manipulation. This issue stems from insufficient access control mechanisms that fail to properly validate user permissions when processing memo-related operations. The vulnerability allows authenticated attackers who have already established credentials within the system to bypass intended authorization checks and gain unauthorized access to memo data, potentially enabling both data modification and unauthorized retrieval of confidential information. The flaw exists in the application's permission validation logic where the system does not adequately verify whether the authenticated user possesses the necessary privileges to perform specific memo operations, creating a path for privilege escalation and data compromise.
This authorization bypass vulnerability operates at the application layer and can be exploited by attackers who have already obtained valid user credentials through various means such as credential theft, social engineering, or other initial compromise techniques. The technical implementation flaw manifests in how the system handles memo access requests, where the authorization checks are either missing, improperly configured, or fail to properly enforce role-based access controls. The vulnerability directly relates to CWE-285, which describes improper authorization conditions in software systems, and aligns with ATT&CK technique T1078.004 for valid accounts and T1566.001 for credential harvesting, demonstrating how this weakness can be leveraged in broader attack chains. The flaw affects the integrity and confidentiality of memo data by allowing unauthorized modifications and unauthorized data access, potentially compromising sensitive business information, personal data, or proprietary communications stored within the Garoon platform.
The operational impact of this vulnerability extends beyond simple data exposure, as it enables attackers to manipulate memo records which could contain critical business information, personal communications, or confidential project details. An attacker could modify existing memos to inject false information, delete important records, or create new memo entries with malicious content, potentially disrupting business operations or misleading other users. The vulnerability affects organizations using Cybozu Garoon within their enterprise environments, particularly those relying on the platform for internal communications, project management, or document sharing. Organizations with sensitive data stored in memos may face significant compliance risks, especially in regulated industries where unauthorized data access or modification could violate data protection regulations such as GDPR, HIPAA, or SOX requirements. The impact is particularly severe because the vulnerability requires only authentication, not privileged accounts, making it accessible to any user with valid credentials within the system.
Organizations should immediately implement mitigations including applying the latest security patches provided by Cybozu, reviewing and strengthening access control policies, and implementing additional monitoring for unauthorized memo access attempts. System administrators should conduct comprehensive access control reviews to ensure proper role-based permissions are enforced, particularly for memo functionality. Network segmentation and privilege separation should be implemented to limit the scope of potential exploitation, while enhanced logging and audit trails should be enabled to detect unauthorized activities. Additional security controls such as multi-factor authentication, regular security assessments, and user behavior analytics should be deployed to identify and prevent exploitation attempts. Organizations should also consider implementing automated vulnerability scanning tools to detect similar authorization flaws in other applications and systems within their environment. The remediation process should include thorough testing of access controls to ensure that the patch or workaround effectively addresses the authorization bypass without introducing new functionality issues, and security teams should monitor for any related attack patterns or indicators of compromise in their network traffic and system logs.