CVE-2018-18476 in mysql-binuuid-rails
Summary
by MITRE
mysql-binuuid-rails 1.1.0 and earlier allows SQL Injection because it removes default string escaping for affected database columns.
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Analysis
by VulDB Data Team • 05/30/2023
The vulnerability identified as CVE-2018-18476 affects the mysql-binuuid-rails gem version 1.1.0 and earlier, presenting a significant security risk through SQL injection exploitation. This issue stems from the gem's approach to handling database column escaping, specifically when dealing with binary uuid columns in mysql databases. The flaw occurs because the gem removes the default string escaping mechanisms that are typically enforced by the rails framework, creating an avenue for malicious input to bypass security controls and directly manipulate database queries.
The technical implementation of this vulnerability involves the mysql-binuuid-rails gem's handling of binary uuid data types within mysql databases. When the gem processes binary uuid columns, it intentionally disables the standard escaping mechanisms that would normally protect against injection attacks. This removal of default protections creates a dangerous gap where user input can be directly incorporated into sql queries without proper sanitization. The flaw specifically impacts applications using the mysql adapter with binary uuid columns, making it particularly relevant for web applications that store and retrieve binary uuid data.
From an operational perspective, this vulnerability enables attackers to execute arbitrary sql commands against affected mysql databases, potentially leading to complete database compromise. The impact extends beyond simple data theft to include data manipulation, unauthorized access to sensitive information, and potential system escalation. Attackers can leverage this vulnerability to extract confidential data, modify database contents, or even gain administrative control over the database system. The vulnerability is particularly dangerous because it operates silently, allowing attackers to perform malicious activities without immediate detection.
The security implications of CVE-2018-18476 align with CWE-89 which categorizes SQL injection vulnerabilities, and the attack surface maps to several ATT&CK techniques including command and control through database manipulation and credential access via data extraction. Organizations using affected versions of the mysql-binuuid-rails gem should immediately implement mitigations including updating to patched versions, implementing additional input validation layers, and reviewing database access controls. The vulnerability demonstrates the critical importance of understanding how third-party gems interact with core security mechanisms and highlights the need for comprehensive security testing of all dependencies in web applications. Organizations should also consider implementing database activity monitoring and intrusion detection systems to identify potential exploitation attempts.