CVE-2015-2066 in DLGuard
Summary
by MITRE
SQL injection vulnerability in DLGuard 4.5 allows remote attackers to execute arbitrary SQL commands via the c parameter to index.php.
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Analysis
by VulDB Data Team • 04/13/2018
The vulnerability identified as CVE-2015-2066 represents a critical SQL injection flaw within DLGuard version 4.5, a web application designed for digital rights management and content protection. This vulnerability specifically affects the application's handling of user input through the c parameter in the index.php file, creating a pathway for remote attackers to manipulate the underlying database infrastructure. The flaw stems from inadequate input validation and sanitization mechanisms that fail to properly escape or filter user-supplied data before incorporating it into SQL query constructions.
The technical implementation of this vulnerability follows a classic SQL injection pattern where the c parameter serves as the attack vector. When an attacker submits malicious input through this parameter, the application processes the data without proper sanitization, allowing SQL commands to be executed within the database context. This occurs because the application directly concatenates user input into SQL queries without employing parameterized queries or adequate input filtering techniques. The vulnerability is classified under CWE-89 which specifically addresses SQL injection flaws, and aligns with ATT&CK technique T1190 which describes exploiting vulnerabilities in web applications to execute arbitrary code.
The operational impact of this vulnerability extends beyond simple data theft, as it enables attackers to perform a wide range of malicious activities including unauthorized data access, modification, or deletion. Remote attackers can leverage this vulnerability to escalate privileges within the application, potentially gaining administrative control over the entire DLGuard system. The consequences include data breaches, service disruption, and potential compromise of the entire digital rights management infrastructure. Attackers may also use this vulnerability to establish persistent access points or to conduct further reconnaissance against connected systems, making the impact significantly broader than the initial SQL injection.
Mitigation strategies for CVE-2015-2066 require immediate implementation of input validation and parameterized queries to prevent user input from being interpreted as SQL commands. Organizations should deploy web application firewalls to monitor and filter suspicious traffic patterns targeting the vulnerable parameter. Regular security assessments and code reviews should be conducted to identify similar vulnerabilities in other application components. The patching process should involve updating DLGuard to a version that properly sanitizes input parameters and implements secure coding practices. Additionally, database access controls should be reviewed to ensure that application accounts have minimal required privileges, reducing the potential damage from successful exploitation attempts. Security teams should also implement monitoring mechanisms to detect unusual database access patterns that may indicate exploitation attempts.