CVE-2020-8638 in TestLink
Summary
by MITRE
A SQL injection vulnerability in TestLink 1.9.20 allows attackers to execute arbitrary SQL commands in planUrgency.php via the urgency parameter.
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Analysis
by VulDB Data Team • 05/13/2024
The vulnerability identified as CVE-2020-8638 represents a critical SQL injection flaw within the TestLink test management platform version 1.9.20. This vulnerability specifically affects the planUrgency.php script which handles urgency parameter inputs, creating an exploitable entry point for malicious actors to manipulate the underlying database system. The flaw stems from insufficient input validation and sanitization mechanisms that fail to properly escape or filter user-supplied data before incorporating it into SQL query constructions. Attackers can leverage this vulnerability by crafting malicious payloads through the urgency parameter, enabling them to execute arbitrary SQL commands against the database backend. This type of vulnerability falls under the Common Weakness Enumeration category CWE-89, which specifically addresses SQL injection weaknesses in software applications. The attack vector operates through the web interface where the urgency parameter is processed, making it accessible to both authenticated and unauthenticated users depending on the application's access controls.
The operational impact of this vulnerability extends beyond simple data theft or modification, as it provides attackers with the capability to perform complete database compromise operations. Successful exploitation can result in unauthorized data access, data manipulation, privilege escalation, and potentially full system compromise if the database user has elevated permissions. The vulnerability's location within planUrgency.php suggests that it affects test planning and urgency management functionalities within the TestLink platform, potentially allowing attackers to alter test execution priorities, modify test case data, or access sensitive test information. From an adversarial perspective, this vulnerability aligns with ATT&CK technique T1071.005 for application layer protocol usage and T1213.002 for data from information repositories, as attackers can leverage this to extract and manipulate stored test data. The vulnerability's persistence is particularly concerning as it allows attackers to maintain access and continue executing malicious commands without requiring repeated exploitation attempts.
Mitigation strategies for CVE-2020-8638 should prioritize immediate patch application from the vendor, as TestLink 1.9.20 has received updates addressing this specific vulnerability. Organizations should implement proper input validation and parameterized query mechanisms to prevent similar issues in the future, ensuring that all user inputs undergo rigorous sanitization before database interaction. The implementation of web application firewalls and database activity monitoring systems can provide additional layers of protection and detection capabilities. Security teams should conduct comprehensive vulnerability assessments to identify other potential SQL injection points within the TestLink platform and related applications. Access controls should be reviewed and strengthened to limit the impact of potential exploitation, particularly by ensuring that database users have minimal required privileges. Regular security testing including penetration testing and automated vulnerability scanning should be implemented to identify and remediate similar vulnerabilities before they can be exploited by malicious actors. The remediation process should also include thorough code review practices to ensure that all database interactions follow secure coding standards and that input validation is consistently applied across all application components.