CVE-2018-15684 in XBTIT
Summary
by MITRE
An issue was discovered in BTITeam XBTIT. PHP error logs are stored in an open directory (/include/logs) using predictable file names, which can lead to full path disclosure and leakage of sensitive data.
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Analysis
by VulDB Data Team • 03/20/2020
The vulnerability identified as CVE-2018-15684 resides within BTITeam XBTIT, a popular BitTorrent tracker software implementation. This security flaw represents a critical information disclosure weakness that stems from improper handling of PHP error logging mechanisms. The vulnerability manifests when error logs are generated and stored in a directory structure that lacks proper access controls and predictable naming conventions, creating a significant exposure surface for attackers seeking to exploit the system.
The technical implementation of this vulnerability involves the storage of PHP error logs in the /include/logs directory path, which is accessible to unauthorized users. This directory structure violates fundamental security principles by exposing sensitive system information through predictable file naming patterns. When PHP generates error logs, these files contain detailed information about the system environment, including absolute file paths, server configuration details, and potentially sensitive operational data that could be leveraged by malicious actors for further exploitation attempts.
The operational impact of this vulnerability extends beyond simple information disclosure, as it provides attackers with critical reconnaissance data that can be used to craft more sophisticated attacks. The leaked path information can facilitate directory traversal attacks, help identify system vulnerabilities, and enable attackers to bypass security controls by understanding the underlying file structure. This weakness directly aligns with CWE-200, which defines information exposure vulnerabilities, and can be categorized under ATT&CK technique T1212, which involves exploitation of information disclosure vulnerabilities for reconnaissance purposes.
Organizations utilizing BTITeam XBTIT software face significant risk from this vulnerability, as the predictable file names in the logs directory create a straightforward attack vector for information gathering. The exposure of full system paths in error logs can reveal the exact version of PHP being used, the operating system configuration, and the complete directory structure of the web application, all of which are valuable intelligence for attackers planning targeted attacks. This vulnerability particularly affects systems where proper input validation and secure logging practices have not been implemented, creating a persistent threat that can be exploited repeatedly.
Mitigation strategies for this vulnerability require immediate implementation of access control measures to restrict public access to the /include/logs directory. Security configurations should ensure that error logging directories are properly protected through web server configuration, file system permissions, and application-level access controls. The implementation of secure logging practices, including the use of non-predictable file naming conventions and the restriction of sensitive information in error logs, can significantly reduce the attack surface. Additionally, regular security audits and penetration testing should be conducted to identify and remediate similar information disclosure vulnerabilities across the entire application stack, ensuring compliance with security frameworks such as OWASP Top Ten and NIST cybersecurity guidelines.