CVE-2024-31397 in Garoon
Summary
by MITRE • 06/11/2024
Improper handling of extra values issue exists in Cybozu Garoon 5.0.0 to 5.15.2. If this vulnerability is exploited, a user who can log in to the product with the administrative privilege may be able to cause a denial-of-service (DoS) condition.
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Analysis
by VulDB Data Team • 02/13/2026
The vulnerability identified as CVE-2024-31397 represents a critical improper handling of extra values flaw within Cybozu Garoon versions 5.0.0 through 5.15.2. This issue stems from inadequate input validation mechanisms that fail to properly process extraneous or unexpected data values within the application's processing pipeline. The vulnerability exists at the application logic level where the system does not adequately sanitize or validate additional parameters that may be passed during administrative operations, creating a potential attack surface for malicious actors with administrative access privileges.
Cybozu Garoon serves as a comprehensive collaboration platform that includes calendar management, document sharing, and workflow automation features. The improper handling of extra values occurs when the system processes administrative requests that contain unexpected data elements, potentially leading to memory corruption, resource exhaustion, or abnormal termination of critical system processes. This flaw specifically affects the administrative functionality of the platform, where privileged users can manipulate input parameters to trigger unexpected behavior in the underlying software architecture.
The operational impact of this vulnerability is significant as it enables authenticated administrative users to potentially cause denial-of-service conditions that can severely disrupt business operations. When exploited, the vulnerability can result in complete service unavailability, requiring system restarts and administrative intervention to restore normal functionality. The DoS condition may affect critical collaboration services including calendar synchronization, document management, and workflow processing, which are essential for organizational productivity. This vulnerability directly impacts the availability aspect of the CIA triad and can be classified under CWE-20 as "Improper Input Validation" with potential implications for system stability and business continuity.
Attackers with administrative privileges can leverage this vulnerability to systematically destabilize the Garoon platform by injecting malformed data values that cause the application to crash or become unresponsive. The exploitation process typically involves crafting specific input sequences that bypass normal validation checks and trigger the underlying flaw in the data processing logic. This vulnerability aligns with ATT&CK technique T1499.004 for "Endpoint Denial of Service" and represents a privilege escalation vector that can be used to disrupt services without requiring additional authentication. The attack surface is limited to authenticated administrative users, but the impact can be severe as administrative accounts typically have broad system access and control capabilities.
Mitigation strategies should focus on implementing comprehensive input validation mechanisms that properly sanitize all administrative inputs and reject any extraneous data values that do not conform to expected parameter formats. System administrators should immediately apply the vendor-provided security patches and updates that address this specific vulnerability. Additional protective measures include implementing strict access controls, monitoring administrative activities for anomalous input patterns, and establishing robust logging mechanisms to detect potential exploitation attempts. Network segmentation and privilege separation can help limit the potential impact if exploitation occurs, while regular security assessments should verify that input validation mechanisms are functioning correctly. The vulnerability demonstrates the critical importance of proper data validation in enterprise collaboration platforms where administrative functions can have cascading effects on overall system stability and availability.