CVE-2019-9622 in eBrigade
Summary
by MITRE
eBrigade through 4.5 allows Arbitrary File Download via ../ directory traversal in the showfile.php file parameter, as demonstrated by reading the user-data/save/backup.sql file.
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Analysis
by VulDB Data Team • 08/18/2025
The vulnerability identified as CVE-2019-9622 represents a critical directory traversal flaw within the eBrigade web application version 4.5 and earlier. This security weakness exists in the showfile.php component where user input is inadequately validated and sanitized before being used to construct file paths. The flaw specifically manifests when the application fails to properly filter or escape directory traversal sequences such as ../ which allows attackers to navigate outside the intended directory structure and access arbitrary files on the server filesystem. The vulnerability is particularly concerning because it enables remote attackers to retrieve sensitive data from the application's file system without authentication or authorization, potentially exposing critical database backups and user information.
The technical implementation of this vulnerability stems from improper input validation and path construction within the application's file handling logic. When the showfile.php script receives a file parameter, it directly incorporates user-supplied input into the file path resolution process without adequate sanitization. This creates an environment where malicious actors can manipulate the file parameter to include directory traversal sequences that bypass normal access controls. The vulnerability specifically targets the user-data/save/backup.sql file which contains database backup information, making it particularly valuable to attackers seeking to compromise the application's data integrity and confidentiality. The flaw aligns with CWE-22 - Improper Limitation of a Pathname to a Restricted Directory and is categorized under the ATT&CK technique T1074 - Data Staged, as it enables attackers to access and exfiltrate sensitive data from the compromised system.
The operational impact of this vulnerability extends beyond simple information disclosure, as it provides attackers with potential access to database backup files that may contain sensitive user credentials, personal information, or application configuration data. The ability to download backup.sql files through directory traversal attacks can result in complete database compromise, leading to data breaches, identity theft, and potential system compromise. Attackers can leverage this vulnerability to gain unauthorized access to multiple files beyond just the backup.sql file, potentially accessing configuration files, source code, or other sensitive system components. This vulnerability particularly affects web applications that store sensitive data in predictable file locations and lack proper input validation mechanisms. Organizations running affected versions of eBrigade face significant risk of data exposure and potential regulatory compliance violations.
Mitigation strategies for CVE-2019-9622 should focus on implementing robust input validation and sanitization measures within the application's file handling components. The most effective approach involves implementing a whitelist-based file access control mechanism that only permits access to predefined, legitimate files and directories. Developers should implement proper path normalization and validation to prevent directory traversal sequences from being processed as part of file paths. Additionally, the application should enforce strict access controls and ensure that file operations occur within designated, secure directories without allowing path traversal. System administrators should also consider implementing web application firewalls and input filtering mechanisms to detect and block malicious directory traversal attempts. Regular security updates and patch management procedures should be implemented to address similar vulnerabilities in third-party components and ensure that the application remains protected against known attack vectors. The remediation efforts should align with security best practices outlined in OWASP Top Ten and NIST cybersecurity guidelines for preventing path traversal vulnerabilities in web applications.