CVE-2019-5976 in Garoon
Summary
by MITRE
Cybozu Garoon 4.0.0 to 4.10.2 allows an attacker with administrative rights to cause a denial of service condition via unspecified vectors.
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Analysis
by VulDB Data Team • 12/19/2023
Cybozu Garoon is a collaboration platform that provides enterprise-level services including calendar management, document sharing, and workflow automation. The vulnerability identified as CVE-2019-5976 affects versions 4.0.0 through 4.10.2 of this software, representing a significant security concern for organizations relying on this platform for business operations. This vulnerability specifically targets the administrative functionality of the system, creating a potential pathway for malicious actors to disrupt service availability.
The technical flaw manifests through unspecified vectors that allow an authenticated attacker with administrative privileges to trigger a denial of service condition. While the exact technical mechanism remains unspecified in the CVE description, such vulnerabilities typically exploit weaknesses in input validation, resource management, or error handling within administrative interfaces. The fact that administrative rights are required suggests the vulnerability exists within the privileged management functions of the application, potentially involving improper handling of administrative commands or configuration changes that could lead to system instability or resource exhaustion.
The operational impact of this vulnerability extends beyond simple service disruption, as it represents a critical weakness in an enterprise collaboration platform where uptime and reliability are paramount. Organizations using Garoon 4.0.0 to 4.10.2 face potential business interruption if an attacker with administrative access exploits this vulnerability. The denial of service condition could prevent legitimate users from accessing critical collaboration features, including calendar scheduling, document management, and workflow processes. This vulnerability particularly concerns organizations that have centralized administrative access or where administrative credentials are compromised, as it provides a direct pathway for service disruption without requiring additional attack vectors.
Organizations should immediately implement mitigation strategies including applying available patches from Cybozu, which would address the underlying vulnerability in the administrative handling mechanisms. Network segmentation and access controls should be reinforced to limit administrative privileges to only essential personnel, following principle of least privilege practices. Monitoring for unusual administrative activity and implementing intrusion detection systems can help identify potential exploitation attempts. The vulnerability aligns with CWE-400 which addresses improper handling of resource exhaustion conditions, and may also relate to ATT&CK technique T1499 which covers network disruption attacks. Regular security assessments and privileged access monitoring should be enhanced to detect potential exploitation attempts. Organizations should also consider implementing redundant systems or backup collaboration platforms to maintain business continuity during remediation periods.