CVE-2020-8637 in TestLink
Summary
by MITRE
A SQL injection vulnerability in TestLink 1.9.20 allows attackers to execute arbitrary SQL commands in dragdroptreenodes.php via the node_id parameter.
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Analysis
by VulDB Data Team • 05/13/2024
The vulnerability identified as CVE-2020-8637 represents a critical SQL injection flaw within the TestLink test management platform version 1.9.20. This vulnerability specifically affects the dragdroptreenodes.php component which handles tree node operations in the application's user interface. The flaw stems from insufficient input validation and sanitization of the node_id parameter, creating an exploitable condition that allows remote attackers to inject malicious SQL commands into the backend database. The vulnerability is classified under CWE-89 which specifically addresses SQL injection weaknesses where untrusted data is incorporated into SQL queries without proper escaping or parameterization.
The technical implementation of this vulnerability occurs when the dragdroptreenodes.php script processes user-supplied node_id values without adequate sanitization measures. Attackers can manipulate the node_id parameter to inject malicious SQL payloads that bypass authentication mechanisms and gain unauthorized access to the underlying database. This type of injection can potentially lead to complete database compromise including data exfiltration, modification of test results, user account manipulation, and privilege escalation. The vulnerability exists because the application directly incorporates user input into SQL query construction without proper parameterized queries or input validation techniques.
From an operational impact perspective, this vulnerability poses significant risks to organizations using TestLink for test management and quality assurance processes. The potential for unauthorized access to test data, including sensitive test cases, execution results, and user credentials, creates a substantial security risk. Attackers could exploit this vulnerability to alter test outcomes, manipulate test execution data, or even escalate privileges to gain administrative access to the TestLink application. The attack surface is particularly concerning as TestLink is often used in enterprise environments where test data may contain sensitive information about application functionality and security testing results. This vulnerability aligns with ATT&CK technique T1071.005 for application layer protocol manipulation and T1190 for exploitation of remote services.
Organizations should implement immediate mitigations including applying the vendor-provided patches or updates that address this vulnerability, implementing input validation controls for all user-supplied parameters, and configuring web application firewalls to detect and block SQL injection attempts. The recommended approach involves enforcing proper parameterized queries throughout the application codebase, implementing input sanitization routines, and conducting regular security testing to identify similar vulnerabilities. Additionally, network segmentation and least privilege access controls should be enforced to limit the potential impact of successful exploitation. The vulnerability demonstrates the critical importance of input validation and proper database query construction practices as outlined in OWASP Top 10 A03:2021 and the CWE hierarchy for SQL injection vulnerabilities.