CVE-2019-20107 in TestLink
Summary
by MITRE
Multiple SQL injection vulnerabilities in TestLink through 1.9.19 allows remote authenticated users to execute arbitrary SQL commands via the (1) tproject_id parameter to keywordsView.php; the (2) req_spec_id parameter to reqSpecCompareRevisions.php; the (3) requirement_id parameter to reqCompareVersions.php; the (4) build_id parameter to planUpdateTC.php; the (5) tplan_id parameter to newest_tcversions.php; the (6) tplan_id parameter to tcCreatedPerUserGUI.php; the (7) tcase_id parameter to tcAssign2Tplan.php; or the (8) testcase_id parameter to tcCompareVersions.php. Authentication is often easy to achieve: a guest account, that can execute this attack, can be created by anyone in the default configuration.
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Analysis
by VulDB Data Team • 04/09/2024
This vulnerability represents a critical SQL injection flaw in TestLink version 1.9.19 and earlier, affecting multiple endpoints within the application's web interface. The vulnerability stems from inadequate input validation and sanitization of user-supplied parameters passed through various PHP scripts, creating multiple attack vectors that allow authenticated users to execute arbitrary SQL commands. The affected parameters include tproject_id, req_spec_id, requirement_id, build_id, tplan_id, and testcase_id across different functionality modules such as keywords management, requirement comparison, test case planning, and build tracking. These vulnerabilities fall under CWE-89 which specifically addresses SQL injection weaknesses in software applications where untrusted data is directly incorporated into SQL queries without proper sanitization or parameterization.
The operational impact of this vulnerability is severe as it enables authenticated attackers to gain unauthorized access to the underlying database system. Attackers can leverage these injection points to extract sensitive information, modify database records, delete critical data, or even escalate privileges within the database environment. The vulnerability is particularly dangerous because the default configuration allows anyone to create guest accounts, meaning that unauthorized individuals can easily authenticate and exploit these flaws without requiring special credentials. This creates a significant risk for organizations that rely on TestLink for test management and quality assurance processes, as the database could be compromised through relatively simple attacks that require minimal technical expertise.
The attack vectors are particularly concerning due to their widespread presence across different modules of the TestLink application. The keywordsView.php endpoint allows attackers to manipulate project-level data through the tproject_id parameter, while reqSpecCompareRevisions.php provides access to requirement specifications via req_spec_id. The reqCompareVersions.php script exposes requirement-level data through requirement_id, and multiple build-related functions including planUpdateTC.php with build_id parameter create additional attack surfaces. The tplan_id parameters in newest_tcversions.php and tcCreatedPerUserGUI.php, along with tcase_id in tcAssign2Tplan.php and testcase_id in tcCompareVersions.php, all present opportunities for attackers to manipulate test plan and test case data. These vulnerabilities align with ATT&CK technique T1071.005 for application layer protocol manipulation and T1046 for network service discovery, as attackers can systematically probe these endpoints to identify and exploit the various injection points.
Organizations should immediately implement comprehensive mitigations including input validation, parameterized queries, and proper authentication controls. The most effective immediate solution involves implementing proper input sanitization and parameterized SQL queries across all affected endpoints, ensuring that user-supplied data cannot be interpreted as SQL commands. Additionally, organizations should enforce strict access controls and disable guest account creation if not required for legitimate business operations. Regular security audits and code reviews should be conducted to identify similar vulnerabilities in other components of the TestLink application. The implementation of web application firewalls and database activity monitoring can provide additional layers of protection. Organizations should also consider upgrading to the latest stable version of TestLink where these vulnerabilities have been addressed through proper input validation and secure coding practices.