CVE-2018-1306 in Pluto
Summary
by MITRE
The PortletV3AnnotatedDemo Multipart Portlet war file code provided in Pluto version 3.0.0 could allow a remote attacker to obtain sensitive information, caused by the failure to restrict path information provided during a file upload. An attacker could exploit this vulnerability to obtain configuration data and other sensitive information.
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Analysis
by VulDB Data Team • 11/01/2025
The vulnerability identified as CVE-2018-1306 affects the PortletV3AnnotatedDemo Multipart Portlet within Apache Pluto version 3.0.0, representing a significant security flaw that enables remote attackers to extract sensitive configuration data through improper file upload handling. This vulnerability resides in the multipart portlet implementation that processes file uploads, where the system fails to adequately validate or restrict path information submitted during the upload process. The flaw allows malicious actors to manipulate file upload parameters and potentially access system configuration files, application settings, and other confidential data that should remain protected from unauthorized access.
The technical nature of this vulnerability stems from insufficient input validation and path traversal protection mechanisms within the file upload functionality. When users submit files through the multipart portlet, the system should enforce strict validation to prevent attackers from injecting malicious path information that could lead to directory traversal attacks. The failure to restrict path information during file uploads creates an opportunity for attackers to navigate the file system and access sensitive resources that are not intended to be publicly accessible. This weakness directly relates to CWE-22, which describes improper limitation of a pathname to a restricted directory, commonly known as directory traversal attacks. The vulnerability represents a critical security gap in the input sanitization process, where the application fails to properly validate user-supplied path data before processing file upload operations.
From an operational perspective, this vulnerability poses substantial risks to organizations utilizing Apache Pluto 3.0.0, as it provides attackers with potential access to configuration files that may contain database credentials, encryption keys, application settings, and other sensitive information. The impact extends beyond simple data exposure, as compromised configuration data could enable further exploitation attempts, including privilege escalation, authentication bypasses, or the discovery of additional system vulnerabilities. Attackers could leverage this information to understand the application architecture, identify weak points in the system, and plan more sophisticated attacks. The remote nature of this vulnerability means that attackers do not require physical access to the system or local network presence to exploit it, making it particularly dangerous for web-facing applications. This vulnerability aligns with ATT&CK technique T1083, which focuses on discovering system information, and T1078, which covers valid accounts, as compromised configuration data could provide attackers with credentials or system access patterns.
Organizations affected by this vulnerability should implement immediate mitigations including updating to a patched version of Apache Pluto, implementing strict input validation for all file upload operations, and configuring proper path restrictions during file processing. The recommended approach involves enforcing whitelist validation for file paths, implementing proper access controls for uploaded files, and ensuring that all user-supplied path information is sanitized before processing. Additionally, organizations should conduct comprehensive security assessments of their portal environments to identify any other potential vulnerabilities in similar components, as this flaw may indicate broader issues with input validation and path handling across the application stack. Security teams should also implement monitoring mechanisms to detect unusual file upload patterns and access attempts to sensitive configuration areas, providing early warning capabilities for potential exploitation attempts. The vulnerability demonstrates the critical importance of proper input validation and access control mechanisms in preventing unauthorized information disclosure, particularly in portal and web application environments where multiple users interact with shared resources.