CVE-2024-32371 in HC Mailinspector
Summary
by MITRE • 05/07/2024
An issue in HSC Cybersecurity HC Mailinspector 5.2.17-3 through 5.2.18 allows a regular user account to escalate their privileges and gain administrative access by changing the type parameter from 1 to 0.
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Analysis
by VulDB Data Team • 05/07/2024
The vulnerability identified as CVE-2024-32371 affects HSC Cybersecurity HC Mailinspector versions 5.2.17-3 through 5.2.18, representing a critical privilege escalation flaw that undermines the application's access control mechanisms. This issue stems from improper input validation within the application's user management subsystem where the type parameter is not adequately sanitized or validated before being processed. The vulnerability specifically manifests when a regular user account attempts to manipulate the type parameter value from 1, which typically represents a standard user role, to 0, which corresponds to an administrative role within the application's internal access control framework.
The technical exploitation of this vulnerability occurs through parameter manipulation within the application's user account modification functionality. When a user attempts to change their account type through the application interface, the system fails to validate whether the requesting user possesses sufficient privileges to make such a change. This lack of proper authorization checking creates a path for privilege escalation where any authenticated user can modify their account type parameter to gain administrative privileges. The vulnerability is classified under CWE-285 which addresses improper authorization in software systems, specifically focusing on insufficient access control mechanisms that allow unauthorized users to perform privileged operations.
From an operational perspective, this vulnerability presents a severe risk to the security posture of organizations relying on HC Mailinspector for email security management. The ability to escalate privileges without proper authentication creates a pathway for attackers to gain complete administrative control over the email security infrastructure. This could enable malicious actors to modify security policies, bypass email filtering rules, access sensitive email communications, and potentially use the compromised system as a staging point for further attacks within the network. The vulnerability impacts the confidentiality, integrity, and availability of the email security services provided by the application.
The attack vector for this vulnerability aligns with ATT&CK technique T1078 which covers legitimate credentials and valid accounts, as the exploitation requires only a regular user account to perform the privilege escalation. The vulnerability also relates to T1548.001 which covers abuse of privileges through legitimate account access, where an attacker leverages existing user credentials to gain elevated permissions. Organizations should consider implementing network segmentation and monitoring for unusual parameter changes within administrative interfaces as part of their defensive strategies.
Mitigation strategies for CVE-2024-32371 should include immediate deployment of vendor patches or updates to versions that address the privilege escalation flaw. Organizations should also implement additional access controls such as role-based access control mechanisms that enforce strict validation of user privileges before allowing parameter modifications. Network monitoring should be enhanced to detect suspicious parameter changes in administrative interfaces, and regular security audits should verify that access control mechanisms are properly enforced. The vulnerability underscores the importance of input validation and proper authorization checks as fundamental security controls that must be implemented throughout all application components. System administrators should also consider implementing multi-factor authentication and principle of least privilege access controls to limit the potential impact of such vulnerabilities.