CVE-2018-16133 in CyBroHttpServer
Summary
by MITRE
Cybrotech CyBroHttpServer 1.0.3 allows Directory Traversal via a ../ in the URI.
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Analysis
by VulDB Data Team • 11/17/2025
The vulnerability identified as CVE-2018-16133 affects the Cybrotech CyBroHttpServer version 1.0.3, representing a critical directory traversal flaw that exposes systems to unauthorized file access and potential data breaches. This issue stems from inadequate input validation within the HTTP server implementation, specifically in how it processes Uniform Resource Identifiers containing relative path navigation sequences. The vulnerability manifests when the server fails to properly sanitize or normalize URI paths that include the ../ sequence, allowing attackers to navigate outside the intended web root directory and access restricted files or directories.
The technical exploitation of this vulnerability follows a well-established pattern that aligns with CWE-22 - Improper Limitation of a Pathname to a Restricted Directory. Attackers can construct malicious URIs containing sequences such as ../../etc/passwd or ../../../windows/system32/drivers/etc/hosts to traverse the file system hierarchy and retrieve sensitive information. This type of vulnerability is particularly dangerous because it can be leveraged to access system configuration files, application source code, user credentials, and other confidential data that should remain protected within the server's designated access boundaries. The flaw operates at the application layer of the network stack and can be exploited through standard HTTP requests without requiring special privileges or authentication.
The operational impact of this vulnerability extends beyond simple information disclosure, as it provides attackers with a foothold for further exploitation within the compromised system. According to ATT&CK framework tactic TA0005 - Credential Access and TA0006 - Privilege Escalation, successful exploitation can lead to credential harvesting from configuration files, potentially enabling attackers to escalate privileges or move laterally within the network. The vulnerability affects the integrity and confidentiality of data stored on the server, as attackers can not only read sensitive files but may also be able to modify or delete them depending on the server's configuration and file permissions. Organizations running this specific version of CyBroHttpServer face significant risk of data breaches and compliance violations, particularly in environments where regulatory requirements mandate strict data access controls.
Mitigation strategies for CVE-2018-16133 should prioritize immediate patching of the affected CyBroHttpServer version to the latest available release that addresses this directory traversal vulnerability. System administrators should implement input validation mechanisms that properly sanitize all URI components, rejecting or normalizing any path sequences that attempt to traverse directories. Network segmentation and access control measures can help limit the potential impact of exploitation, while implementing proper logging and monitoring can detect suspicious URI patterns. The vulnerability also highlights the importance of adhering to secure coding practices such as those recommended in OWASP Top 10 and the ISO 27001 security framework, where proper input validation and output encoding are fundamental requirements for preventing path traversal attacks. Additionally, organizations should conduct regular vulnerability assessments and penetration testing to identify similar flaws in other web applications and services within their infrastructure.