CVE-2021-30133 in CloverDX
Summary
by MITRE • 06/09/2021
A cross-site scripting (XSS) vulnerability in CloverDX Server 5.9.0, CloverDX 5.8.1, CloverDX 5.7.0, and earlier allows remote attackers to inject arbitrary web script or HTML via the sessionToken parameter of multiple methods in Simple HTTP API. This is resolved in 5.9.1 and 5.10.
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Analysis
by VulDB Data Team • 06/12/2021
The vulnerability CVE-2021-30133 represents a critical cross-site scripting flaw affecting multiple versions of CloverDX Server and CloverDX platform. This security weakness resides within the Simple HTTP API implementation where the sessionToken parameter fails to properly sanitize user input before processing. The vulnerability impacts versions 5.9.0, 5.8.1, 5.7.0, and earlier releases, making a significant portion of the product ecosystem susceptible to malicious exploitation. The flaw specifically manifests when the system processes sessionToken parameters through various API methods, creating an avenue for attackers to inject arbitrary web scripts or HTML content directly into the application's response handling mechanisms.
The technical exploitation of this vulnerability follows a classic XSS attack pattern where malicious input is not adequately validated or escaped before being rendered in web responses. When the sessionToken parameter contains crafted malicious code, the server processes this input without proper sanitization, allowing the injected script to execute within the context of other users' browsers. This type of vulnerability falls under CWE-79 which specifically addresses Cross-site Scripting vulnerabilities in software systems. The attack vector is particularly dangerous because it leverages the sessionToken parameter, which is typically used for legitimate authentication and authorization purposes, making the attack more convincing and harder to detect. The vulnerability affects the server's API endpoints that handle session management, potentially allowing attackers to hijack user sessions, steal sensitive information, or perform unauthorized actions on behalf of authenticated users.
From an operational impact perspective, this vulnerability poses significant risks to organizations using affected CloverDX versions. Attackers could exploit this weakness to execute malicious scripts in the browsers of other users who interact with the vulnerable system, potentially leading to session hijacking, data theft, or further lateral movement within the network. The vulnerability's presence in multiple versions including 5.9.0, 5.8.1, and 5.7.0 means that organizations may have been exposed for extended periods without awareness of the risk. The resolution provided in versions 5.9.1 and 5.10 addresses the core sanitization issue by implementing proper input validation and output encoding mechanisms. This vulnerability aligns with ATT&CK technique T1566 which covers social engineering tactics including the use of malicious links and scripts to compromise user systems. Organizations should prioritize immediate patching of affected systems and implement additional monitoring to detect potential exploitation attempts.
The remediation strategy should focus on upgrading to patched versions 5.9.1 or 5.10, while organizations without immediate access to these updates should consider implementing web application firewalls or input validation rules to mitigate the risk. Security teams should also conduct comprehensive vulnerability assessments to identify any potential exploitation attempts and ensure that all affected systems are properly patched. The vulnerability demonstrates the importance of proper input validation and output encoding in API development, particularly for parameters that handle session management information. Organizations should review their API security practices and implement comprehensive security testing including dynamic and static analysis to prevent similar vulnerabilities from being introduced in future releases.