CVE-2002-1869 in Eventsave
Summary
by MITRE
Heysoft EventSave 5.1 and 5.2 and Heysoft EventSave+ 5.1 and 5.2 does not check whether the log file can be written to, which allows attackers to prevent events from being recorded by opening the log file using an application such as Microsoft s Event Viewer.
Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.
Analysis
by VulDB Data Team • 07/05/2024
CVE-2002-1869 represents a significant privilege escalation vulnerability affecting Heysoft EventSave 5.1 and 5.2 versions along with Heysoft EventSave+ 5.1 and 5.2 products. This vulnerability stems from inadequate input validation and file access control mechanisms within the event logging subsystem. The flaw manifests when the application fails to verify write permissions before attempting to record system events, creating a dangerous condition where malicious actors can exploit this oversight to disrupt critical logging operations.
The technical implementation of this vulnerability aligns with CWE-276, which describes improper file permissions and inadequate access control checks. When an attacker opens the target log file using legitimate tools such as Microsoft Event Viewer or similar applications, they effectively lock the file in a read-only or exclusive access mode. This prevents the EventSave application from performing necessary write operations to the log file, resulting in a complete denial of service for event logging functionality. The vulnerability operates at the operating system level where file locking mechanisms are bypassed due to insufficient permission checks within the application's logging code.
From an operational perspective, this vulnerability presents a severe threat to system monitoring and security auditing capabilities. Organizations relying on EventSave for Windows event logging would experience complete loss of event recording functionality, potentially masking malicious activities or system failures. The impact extends beyond simple service disruption as it compromises the integrity of security incident response procedures and forensic analysis capabilities. Attackers could leverage this vulnerability to create persistent monitoring blind spots while maintaining their presence within the system undetected.
The attack vector for this vulnerability is straightforward yet effective, requiring only basic file access permissions and knowledge of the target logging file location. The technique aligns with ATT&CK tactic TA0003 (Persistence) and technique T1562.006 (Impair Defenses) as it enables attackers to disable critical security controls while remaining covert. The vulnerability demonstrates poor defensive programming practices where the application assumes all necessary resources are available without verification, violating fundamental security principles of least privilege and proper resource management. Organizations should implement immediate mitigations including file permission restrictions, monitoring for unauthorized file access attempts, and deployment of alternative logging solutions that properly validate file access before operation execution.
This vulnerability serves as a classic example of how simple oversight in file access control can create significant security implications. The remediation approach should include updating to patched versions of the EventSave software, implementing proper file permission controls, and establishing monitoring procedures for file access anomalies. Additionally, system administrators should conduct comprehensive audits of all logging applications to identify similar permission checking deficiencies that could expose the organization to comparable risks.