CVE-2018-18427 in S-Cms
Summary
by MITRE
s-cms 3.0 allows SQL Injection via the member/post.php 0_id parameter or the POST data to member/member_login.php.
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Analysis
by VulDB Data Team • 04/04/2020
The vulnerability identified as CVE-2018-18427 affects s-cms version 3.0, a content management system that is susceptible to SQL injection attacks through multiple entry points. This critical security flaw exists in the member/post.php script where the 0_id parameter can be manipulated to execute arbitrary SQL commands, as well as in the member/member_login.php endpoint where POST data handling creates opportunities for malicious input processing. The vulnerability represents a significant risk to systems running this CMS version, as it allows attackers to directly interact with the underlying database infrastructure.
The technical implementation of this vulnerability stems from inadequate input validation and sanitization within the application's database query construction processes. When the 0_id parameter is passed to member/post.php, the application fails to properly escape or parameterize user-supplied input before incorporating it into SQL statements. Similarly, the POST data handling in member/member_login.php lacks proper validation mechanisms, allowing malicious actors to inject SQL fragments that can be executed within the database context. This flaw directly maps to CWE-89 which defines SQL injection as the insertion of malicious SQL code into input fields, and is classified under CWE-770 as it involves improper resource management through uncontrolled input processing.
The operational impact of this vulnerability extends beyond simple data theft or modification. Attackers can leverage this weakness to perform complete database compromise, including unauthorized access to user credentials, personal information, and potentially escalate privileges within the system. The vulnerability affects the confidentiality, integrity, and availability of the CMS infrastructure, as unauthorized parties can manipulate database content, extract sensitive information, or even delete critical data. The attack surface is particularly concerning given that these endpoints are likely used for user authentication and content management operations, making them prime targets for exploitation.
Mitigation strategies for CVE-2018-18427 should focus on immediate implementation of parameterized queries and input validation across all affected endpoints. The recommended approach includes implementing proper input sanitization routines that filter or escape special characters before database processing, utilizing prepared statements with parameter binding to prevent SQL injection, and applying the principle of least privilege for database accounts used by the CMS. Organizations should also implement web application firewalls to detect and block suspicious SQL injection patterns, conduct comprehensive code reviews to identify similar vulnerabilities in other application components, and ensure that all CMS installations are updated to patched versions. This vulnerability aligns with ATT&CK technique T1071.004 which covers application layer protocol manipulation, and T1190 which addresses exploitation of remote services through injection attacks, emphasizing the need for comprehensive defensive measures including network segmentation and regular security assessments.