CVE-2017-11398 in Smart Protection Server
Summary
by MITRE
A session hijacking via log disclosure vulnerability in Trend Micro Smart Protection Server (Standalone) versions 3.2 and below could allow an unauthenticated attacker to hijack active user sessions to perform authenticated requests on a vulnerable system.
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Analysis
by VulDB Data Team • 06/29/2025
The vulnerability identified as CVE-2017-11398 represents a critical session hijacking flaw within Trend Micro Smart Protection Server Standalone versions 3.2 and earlier. This vulnerability stems from improper handling of session management and log disclosure mechanisms that create exploitable conditions for unauthorized access. The flaw allows unauthenticated attackers to obtain session identifiers through log file exposure, subsequently enabling them to impersonate legitimate users and execute authenticated operations within the targeted system environment.
The technical root cause of this vulnerability lies in the inadequate protection of session tokens and authentication state information within the logging subsystem of the Smart Protection Server. When the system generates log entries containing session identifiers or authentication tokens, these sensitive elements are not properly sanitized or restricted in their accessibility. This creates a scenario where attackers can directly access log files that contain session data, effectively obtaining valid session tokens that can be used to establish unauthorized authenticated sessions. The vulnerability aligns with CWE-200, which addresses information exposure, and CWE-306, which covers missing authentication checks, both of which are fundamental security principles that should be enforced throughout the application lifecycle.
The operational impact of this vulnerability extends beyond simple unauthorized access to encompass full system compromise capabilities. An attacker who successfully exploits this flaw can perform any action that a legitimate authenticated user could execute, including accessing restricted administrative functions, modifying system configurations, or exfiltrating sensitive data. The vulnerability's severity is amplified by its unauthenticated nature, meaning that attackers do not require prior credentials or privileged access to begin exploitation. This characteristic makes the vulnerability particularly dangerous in environments where the Smart Protection Server serves as a critical security component, as it could enable attackers to bypass security controls and gain deeper access to network infrastructure.
The attack vector for this vulnerability typically involves reconnaissance activities to identify accessible log files, followed by extraction and reuse of session tokens. Attackers may leverage automated tools to scan for exposed log files or exploit misconfigurations in file permissions that allow public access to sensitive logging data. The exploitation process follows established patterns documented in the MITRE ATT&CK framework under the technique T1563.002 for credential access through session hijacking. Organizations should implement comprehensive monitoring solutions to detect unusual access patterns and log file access attempts that may indicate exploitation attempts. The vulnerability demonstrates the critical importance of proper input validation and output encoding in security-critical applications, as well as the necessity of implementing robust access controls for all system components including logging infrastructure.
Mitigation strategies for this vulnerability should include immediate patching of affected systems to versions that address the session management flaws. Organizations must also implement strict file permission controls on log directories to prevent unauthorized access to session data, while ensuring that sensitive information is not included in log entries or is properly obfuscated. Network segmentation and monitoring solutions should be deployed to detect and alert on suspicious access patterns targeting log files. Additionally, implementing secure session management practices including regular session token rotation and proper session invalidation mechanisms will help reduce the window of opportunity for exploitation. The vulnerability serves as a reminder of the critical need for security controls throughout the entire application lifecycle, particularly in systems handling authentication and session management functions.