CVE-2015-0867 in Download Log CGI
Summary
by MITRE
Directory traversal vulnerability in SYNCK GRAPHICA Download Log CGI 3.0 and earlier allows remote attackers to read arbitrary files via a crafted filename.
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Analysis
by VulDB Data Team • 04/03/2018
The vulnerability identified as CVE-2015-0867 represents a critical directory traversal flaw affecting SYNCK GRAPHICA Download Log CGI version 3.0 and earlier. This vulnerability resides in the web application's handling of user-supplied filename parameters within the download log functionality, creating an avenue for remote attackers to access arbitrary files on the underlying file system. The flaw stems from insufficient input validation and sanitization mechanisms that fail to properly restrict file path access, allowing malicious actors to manipulate directory traversal sequences such as ../ or ..\ to navigate beyond intended directories.
This directory traversal vulnerability maps directly to CWE-22, which classifies improper limitation of a pathname to a restricted directory, commonly known as path traversal or directory traversal. The attack vector leverages the web application's failure to properly validate and sanitize user inputs before processing file operations, enabling attackers to craft malicious requests that bypass normal access controls. The vulnerability is particularly concerning as it allows remote code execution capabilities through file read operations, potentially exposing sensitive system files, configuration data, and user information. Attackers can exploit this weakness to access critical files including system configuration files, database files, application source code, and potentially credentials stored in accessible locations.
The operational impact of this vulnerability extends beyond simple information disclosure, as it can facilitate further attacks within the compromised environment. Remote attackers can leverage the directory traversal capability to access system logs, application configuration files, and potentially sensitive data stored in accessible directories. The vulnerability affects the integrity and confidentiality of the affected system, as unauthorized file access can lead to privilege escalation opportunities and complete system compromise. This weakness particularly impacts organizations relying on SYNCK GRAPHICA Download Log CGI for file management and logging operations, potentially exposing critical business data and infrastructure information. The vulnerability's remote exploitability means that attackers do not require physical access or local network presence to leverage the flaw.
Mitigation strategies for CVE-2015-0867 should focus on implementing robust input validation and sanitization mechanisms to prevent directory traversal attacks. Organizations should immediately upgrade to SYNCK GRAPHICA Download Log CGI versions 3.1 or later, where the vulnerability has been addressed through proper input validation and path restriction implementations. The implementation of proper access controls and least privilege principles can limit the damage from successful exploitation attempts. Security measures should include validating all user-supplied input against a strict whitelist of acceptable characters and patterns, implementing proper directory path validation, and using secure coding practices that prevent arbitrary file access. Additionally, network segmentation and web application firewalls can provide additional layers of protection against exploitation attempts. The vulnerability aligns with ATT&CK technique T1059, which covers command and scripting interpreter usage, as exploitation may involve executing commands through the compromised file access capabilities. Regular security assessments and vulnerability scanning should be conducted to identify similar weaknesses in other applications and systems within the organization's infrastructure.