CVE-2018-0705 in Dezie
Summary
by MITRE
Directory traversal vulnerability in Cybozu Dezie 8.0.2 to 8.1.2 allows remote attackers to read arbitrary files via HTTP requests.
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Analysis
by VulDB Data Team • 04/27/2020
The vulnerability identified as CVE-2018-0705 represents a critical directory traversal flaw within the Cybozu Dezie software ecosystem, specifically affecting versions 8.0.2 through 8.1.2. This security weakness resides in the application's handling of HTTP requests and demonstrates a fundamental failure in input validation and path resolution mechanisms. The vulnerability enables malicious actors to exploit improper sanitization of user-supplied data, allowing unauthorized access to sensitive files within the server's file system through crafted HTTP requests that manipulate directory paths.
The technical exploitation of this vulnerability occurs when the application fails to properly validate or sanitize file path parameters received through HTTP requests. Attackers can construct malicious URLs containing directory traversal sequences such as ../ or ..\ that bypass normal access controls and navigate to arbitrary locations within the file system. This flaw falls under the Common Weakness Enumeration category CWE-22, which specifically addresses Improper Limitation of a Pathname to a Restricted Directory, commonly known as Path Traversal. The vulnerability demonstrates how insufficient input validation can lead to complete compromise of file system access controls and potentially expose sensitive data including configuration files, source code, and user information.
From an operational perspective, this vulnerability presents significant risks to organizations utilizing affected Cybozu Dezie versions, as it allows remote attackers to access files that should remain protected within the application's secure boundaries. The impact extends beyond simple information disclosure, potentially enabling attackers to retrieve database credentials, application configuration files, and other sensitive materials that could facilitate further exploitation. The remote nature of the attack means that adversaries do not require physical access to the system or local network privileges to exploit this vulnerability, making it particularly dangerous in environments where network exposure is extensive. This weakness aligns with the ATT&CK technique T1083, File and Directory Discovery, as it enables attackers to enumerate and access files that would normally be restricted.
Organizations affected by CVE-2018-0705 should immediately implement mitigation strategies focusing on input validation and access control enforcement. The primary remediation involves upgrading to patched versions of Cybozu Dezie that address the directory traversal vulnerability through proper path validation and sanitization mechanisms. Additionally, network administrators should implement web application firewalls and input filtering rules that can detect and block suspicious directory traversal patterns in HTTP requests. Security configurations should enforce strict file system access controls and implement proper authentication mechanisms to limit access to sensitive resources. The vulnerability underscores the importance of regular security updates and comprehensive input validation practices as outlined in security frameworks such as the OWASP Top Ten and NIST cybersecurity guidelines, which emphasize the critical need for proper input sanitization to prevent path traversal attacks and maintain system integrity.