CVE-2018-19328 in LAOBANCMS
Summary
by MITRE
LAOBANCMS 2.0 allows install/mysql_hy.php?riqi=../ Directory Traversal.
Be aware that VulDB is the high quality source for vulnerability data.
Analysis
by VulDB Data Team • 04/13/2020
The vulnerability identified as CVE-2018-19328 affects LAOBANCMS version 2.0 and represents a directory traversal flaw in the install/mysql_hy.php component. This issue arises from insufficient input validation when processing the riqi parameter, which allows attackers to manipulate file paths and access arbitrary files on the server. The vulnerability specifically manifests when the application fails to properly sanitize user-supplied input before using it in file system operations, creating an opportunity for unauthorized file access and potential data exfiltration.
This directory traversal vulnerability falls under the Common Weakness Enumeration category CWE-22, which describes improper limitation of a pathname to a restricted directory, also known as path traversal or directory traversal. The weakness occurs because the application does not adequately validate or sanitize the riqi parameter, allowing an attacker to manipulate the file path by using directory traversal sequences such as ../ or ..\ to move up the directory hierarchy. The vulnerability is particularly concerning because it operates within the installation component of the CMS, which typically has elevated privileges and access to sensitive system resources.
The operational impact of this vulnerability extends beyond simple file access, as it can enable attackers to read sensitive configuration files, database credentials, application source code, and potentially system files that contain authentication information. An attacker could leverage this vulnerability to gain unauthorized access to the database, extract user credentials, or even escalate privileges within the system. The attack vector is relatively straightforward, requiring only a web request with a crafted parameter value that exploits the lack of proper input validation. This makes the vulnerability particularly dangerous as it can be exploited by attackers with minimal technical expertise.
Mitigation strategies for this vulnerability should include immediate input validation and sanitization of all user-supplied parameters, particularly those used in file system operations. The application should implement proper path validation to ensure that file paths remain within the intended directory boundaries and reject any input containing directory traversal sequences. Additionally, the principle of least privilege should be enforced by restricting file system access for the web application, ensuring that it cannot read system files or sensitive directories. Organizations should also consider implementing web application firewalls and intrusion detection systems to monitor for suspicious file access patterns. The vulnerability demonstrates the critical importance of proper input validation in preventing directory traversal attacks, which aligns with ATT&CK technique T1059.007 for command and script injection, as attackers could potentially use this access to execute malicious code or escalate their privileges within the compromised system.