CVE-2023-33668 in DigiExam
Summary
by MITRE • 07/12/2023
DigiExam up to v14.0.2 lacks integrity checks for native modules, allowing attackers to access PII and takeover accounts on shared computers.
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Analysis
by VulDB Data Team • 01/06/2026
The vulnerability identified as CVE-2023-33668 affects DigiExam versions up to v14.0.2 and represents a critical security flaw in the application's handling of native modules. This weakness stems from the absence of proper integrity verification mechanisms that should validate the authenticity and integrity of native code components. The flaw is particularly concerning in shared computing environments where multiple users access the same system, creating an elevated risk profile for unauthorized access and data compromise.
The technical implementation of this vulnerability lies in the application's failure to perform cryptographic checksum validation or digital signature verification of native modules before execution. This omission creates an attack surface where malicious actors can substitute legitimate native components with modified versions that contain backdoors or data exfiltration capabilities. When users access the application on shared computers, the compromised modules can execute with elevated privileges, potentially bypassing standard authentication mechanisms and access controls.
The operational impact of this vulnerability extends beyond simple unauthorized access to encompass comprehensive account takeover capabilities and sensitive data exposure. Attackers can exploit this flaw to gain persistent access to user accounts, potentially accessing personal identifiable information including but not limited to names, email addresses, identification numbers, and other personally sensitive data. The shared computer environment amplifies the risk significantly, as a single compromised module can affect multiple users simultaneously, creating a cascading security failure that undermines the entire authentication and authorization framework.
This vulnerability maps directly to CWE-494 in the Common Weakness Enumeration catalog, which specifically addresses the lack of integrity checks for downloaded code. The flaw also aligns with ATT&CK technique T1078 which covers valid accounts usage and privilege escalation through legitimate credentials. The attack vector typically involves placing malicious native modules in the application's execution path, which then get loaded and executed without proper verification, creating a persistent threat that can operate undetected within the system.
Mitigation strategies should prioritize immediate implementation of code integrity verification mechanisms including digital signature validation and cryptographic checksum verification for all native modules. Organizations should deploy application whitelisting solutions to restrict execution of unauthorized code components and implement comprehensive monitoring for suspicious module loading activities. Regular security audits of native module integrity and mandatory updates to the latest DigiExam version should be enforced. Additionally, users accessing shared computers should be educated about the risks and encouraged to log out completely after use, while system administrators should implement least privilege principles and monitor for unauthorized code modifications to prevent exploitation of this vulnerability.