CVE-2018-5328 in BEIMS ContractorWeb .NET
Summary
by MITRE
ZUUSE BEIMS ContractorWeb .NET 5.18.0.0 allows access to various /UserManagement/ privileged modules without authenticating the user; an attacker can misuse these functionalities to perform unauthorized actions, as demonstrated by Edit User Details.
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Analysis
by VulDB Data Team • 12/23/2019
The vulnerability identified as CVE-2018-5328 affects ZUUSE BEIMS ContractorWeb .NET version 5.18.0.0, representing a critical authentication bypass flaw that undermines the application's security model. This issue stems from insufficient access control mechanisms within the UserManagement module, specifically exposing privileged functionalities without proper user verification. The vulnerability manifests when the application fails to validate user credentials or session tokens before granting access to administrative functions, creating a pathway for unauthorized individuals to exploit the system's privileged modules.
This authentication bypass vulnerability falls under the CWE-285 category, which encompasses improper authorization scenarios where systems fail to properly verify user permissions before granting access to restricted resources. The flaw specifically enables attackers to access various modules under the /UserManagement/ path without undergoing the standard authentication process, which typically would require valid credentials and appropriate user roles. The vulnerability's impact is amplified by the fact that it affects core administrative functionalities, particularly the Edit User Details capability that allows modification of user accounts, permissions, and access controls within the system.
The operational consequences of this vulnerability extend beyond simple unauthorized access, as it provides attackers with the ability to manipulate user accounts and potentially escalate their privileges within the system. An attacker exploiting this flaw could modify user details including usernames, passwords, roles, and access permissions, effectively compromising the integrity and confidentiality of the user management system. This unauthorized modification capability directly impacts the system's availability and can lead to further compromise through privilege escalation or account takeover scenarios. The vulnerability also violates fundamental security principles outlined in the NIST Cybersecurity Framework, particularly in the areas of identity management and access control.
Mitigation strategies for this vulnerability should focus on implementing robust authentication and authorization controls throughout the application's architecture. The most effective immediate solution involves enforcing mandatory authentication checks for all privileged modules, ensuring that proper session management and role-based access controls are implemented. Security professionals should implement input validation and output encoding to prevent potential injection attacks that could exploit the authentication bypass. Additionally, regular security testing including penetration testing and vulnerability assessments should be conducted to identify similar issues within the application's codebase. The remediation process should also include implementing proper logging and monitoring of access attempts to privileged modules, enabling detection of unauthorized access attempts and supporting forensic analysis in case of security incidents. Organizations should also consider implementing the principle of least privilege, ensuring that users only have access to the specific functions required for their roles, thereby limiting the potential damage from compromised accounts or successful exploitation attempts.