CVE-2019-14765 in YellowBox CRM
Summary
by MITRE
Incorrect Access Control in AfficheExplorateurParam() in DIMO YellowBox CRM before 6.3.4 allows a standard authenticated user to use administrative controllers.
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Analysis
by VulDB Data Team • 03/25/2024
The vulnerability identified as CVE-2019-14765 represents a critical access control flaw within the DIMO YellowBox CRM system prior to version 6.3.4. This issue manifests in the AfficheExplorateurParam() function where proper authorization checks fail to validate user privileges before granting access to administrative controller functionalities. The flaw enables standard authenticated users to escalate their privileges and access administrative interfaces that should be restricted to authorized administrators only.
This access control bypass vulnerability falls under the CWE-285 category of Improper Authorization, specifically addressing insufficient access control mechanisms within the application's security framework. The technical implementation flaw occurs when the AfficheExplorateurParam() function does not properly verify whether the authenticated user possesses the necessary administrative privileges before allowing access to controller methods. The vulnerability exists in the application's permission model where user roles are not adequately enforced during controller access requests.
The operational impact of this vulnerability is significant as it allows any authenticated user within the system to gain administrative capabilities without proper authorization. This creates a substantial risk for data integrity and system security, as unauthorized users can potentially modify system configurations, access sensitive information, manipulate user accounts, and perform administrative functions that could compromise the entire CRM environment. The vulnerability essentially undermines the principle of least privilege by allowing standard users to access administrative interfaces.
The attack vector for this vulnerability is relatively straightforward as it requires only standard authentication credentials to exploit. An attacker who has obtained valid user credentials can leverage this flaw to escalate privileges and gain administrative access to the DIMO YellowBox CRM system. This makes the vulnerability particularly dangerous as it can be exploited by both internal malicious users and external attackers who have gained access to legitimate user accounts through various means such as credential theft or social engineering attacks.
Security mitigations for this vulnerability involve implementing proper access control checks within the AfficheExplorateurParam() function to validate user privileges before granting access to administrative controllers. The recommended approach includes enforcing role-based access control mechanisms where user permissions are verified against predefined administrative roles before allowing access to sensitive controller functionalities. Organizations should also implement proper session management, regular privilege audits, and ensure that all user access controls are validated at the application level rather than relying solely on client-side security measures. Additionally, upgrading to DIMO YellowBox CRM version 6.3.4 or later resolves this vulnerability through proper access control implementation and privilege validation mechanisms. This vulnerability aligns with ATT&CK technique T1078 for Valid Accounts and T1484 for Domain Controller Privilege Abuse, highlighting the importance of proper access control enforcement in preventing unauthorized privilege escalation within enterprise systems.