CVE-2020-5567 in Garoon
Summary
by MITRE
Improper authentication vulnerability in Cybozu Garoon 4.0.0 to 4.10.3 allows remote attackers to obtain data in Application Menu.
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Analysis
by VulDB Data Team • 06/03/2024
The vulnerability identified as CVE-2020-5567 represents a critical improper authentication flaw within Cybozu Garoon versions 4.0.0 through 4.10.3. This weakness resides in the application menu functionality where remote attackers can exploit insufficient access controls to obtain sensitive data without proper authorization. The vulnerability stems from inadequate validation of user credentials and session management within the web application interface, creating a pathway for unauthorized information disclosure.
This authentication bypass vulnerability operates through the application menu component that fails to properly verify user permissions before granting access to protected resources. The flaw allows attackers to manipulate the application's access control mechanisms by crafting specific requests that circumvent the normal authentication flow. According to CWE-287, this represents an improper authentication issue where the system does not adequately validate user identities or roles before granting access to restricted functionality. The vulnerability is particularly concerning because it affects the core application menu system which typically contains sensitive operational data, user information, and administrative controls.
The operational impact of this vulnerability extends beyond simple data exposure to encompass potential system compromise and unauthorized administrative access. Remote attackers can leverage this weakness to access confidential information stored within the application menu, potentially including user credentials, system configurations, and business-critical data. The attack surface is significant as the vulnerability affects a wide range of versions within the Garoon 4.x release cycle, making it a persistent threat across multiple deployments. This type of vulnerability aligns with ATT&CK technique T1078 which describes valid accounts usage for persistence and privilege escalation, as unauthorized access could enable attackers to maintain long-term system presence.
Security practitioners should prioritize immediate remediation through official patches provided by Cybozu, as this vulnerability could be exploited by threat actors to gain unauthorized access to sensitive organizational data. The vulnerability's remote exploitability means that attackers do not require physical access to the system or network to leverage the flaw, making it particularly dangerous in enterprise environments where network exposure is common. Organizations should implement network segmentation and access controls to limit exposure while awaiting patch deployment, and conduct thorough security assessments to identify any potential exploitation attempts that may have already occurred. The vulnerability highlights the critical importance of proper authentication mechanisms and access control validation in web applications, particularly those handling sensitive business information and user data.