CVE-2018-18084 in DuomiCMS
Summary
by MITRE
An issue was discovered in DuomiCMS 3.0. SQL injection exists in the ajax.php file, as demonstrated by the uid parameter.
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Analysis
by VulDB Data Team • 04/01/2020
The vulnerability identified as CVE-2018-18084 represents a critical sql injection flaw within DuomiCMS version 3.0 that exposes the application to unauthorized data access and potential system compromise. This vulnerability specifically affects the ajax.php file where user input is improperly sanitized before being incorporated into database queries. The uid parameter serves as the primary attack vector, allowing malicious actors to inject arbitrary sql commands that can manipulate the underlying database structure and extract sensitive information from the system.
From a technical perspective this vulnerability maps directly to CWE-89 which defines improper neutralization of special elements used in sql commands. The flaw occurs when the application fails to properly validate or escape user-supplied input before executing database operations. The ajax.php endpoint likely processes the uid parameter without adequate input filtering, enabling attackers to construct malicious sql payloads that bypass normal authentication and authorization mechanisms. This type of injection vulnerability allows for complete database compromise including data exfiltration, modification of critical records, and potential privilege escalation within the application's database layer.
The operational impact of this vulnerability extends beyond simple data theft to encompass full system compromise and persistent access to sensitive information. Attackers can exploit this flaw to extract user credentials, personal information, and other confidential data stored within the DuomiCMS database. The vulnerability's accessibility through the ajax.php interface means that even unauthenticated users can potentially exploit the flaw, making it particularly dangerous in environments where the application serves public-facing functionality. Additionally, the sql injection could enable attackers to execute destructive operations such as data deletion or database corruption, leading to complete service disruption.
Mitigation strategies for CVE-2018-18084 should prioritize immediate patching of the DuomiCMS application to the latest version that addresses this specific sql injection vulnerability. Organizations should implement proper input validation and parameterized queries throughout the application codebase to prevent similar issues from occurring in other components. Network segmentation and database access controls should be enforced to limit the potential impact of successful exploitation attempts. The implementation of web application firewalls and intrusion detection systems can provide additional layers of protection against sql injection attacks targeting this vulnerability. Security monitoring should include detection of unusual database access patterns and sql command execution that may indicate exploitation attempts. This vulnerability aligns with ATT&CK technique T1071.004 which covers application layer protocol usage and represents a common attack pattern that security teams must defend against through proper input sanitization and access control measures.