CVE-2022-28090 in Jspxcms
Summary
by MITRE • 05/04/2022
Jspxcms v10.2.0 allows attackers to execute a Server-Side Request Forgery (SSRF) via /cmscp/ext/collect/fetch_url.do?url=.
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Analysis
by VulDB Data Team • 05/07/2022
The vulnerability identified as CVE-2022-28090 affects Jspxcms version 10.2.0 and represents a critical server-side request forgery flaw that enables remote attackers to manipulate the application's behavior through crafted requests. This vulnerability specifically targets the /cmscp/ext/collect/fetch_url.do endpoint, which processes URL parameters without adequate validation or sanitization. The flaw resides in the application's handling of external resource fetching functionality, where user-supplied URLs are directly processed without proper input validation mechanisms. Attackers can exploit this weakness by crafting malicious URLs that point to internal network resources or external malicious servers, potentially leading to unauthorized data access, internal network reconnaissance, or further exploitation of vulnerable internal systems. The vulnerability falls under CWE-918, which specifically addresses server-side request forgery conditions where applications fail to properly validate and sanitize URLs used for fetching external resources. From an operational perspective, this vulnerability presents a significant risk to organizations using Jspxcms v10.2.0 as it allows attackers to bypass network security controls and potentially access sensitive internal resources that would normally be protected by firewalls or network segmentation. The attack vector leverages the application's legitimate functionality for fetching external content while abusing it to make unauthorized requests to internal systems or external malicious servers. This represents a classic example of how seemingly benign features can become attack vectors when proper input validation and access controls are not implemented. The vulnerability aligns with ATT&CK technique T1071.004, which describes application layer protocol manipulation, and specifically targets the server-side request forgery category within the broader attack framework. Organizations utilizing this CMS version face potential exposure to reconnaissance activities, data exfiltration attempts, and lateral movement within their network infrastructure. The impact extends beyond simple information disclosure as attackers could potentially use this vulnerability to establish persistent access points or leverage the compromised system to launch further attacks against other network components.
The technical implementation of this vulnerability demonstrates a clear failure in input validation and access control mechanisms within the Jspxcms application. The fetch_url.do endpoint appears to accept arbitrary URLs without performing proper sanitization or validation checks that would normally prevent access to internal network resources or malicious external domains. This flaw indicates a lack of proper parameter filtering and validation, allowing attackers to inject specially crafted URLs that can trigger unintended behavior in the application's underlying HTTP client or network request handling components. The vulnerability's exploitation requires minimal technical skill and can be automated, making it particularly dangerous for organizations with inadequate network monitoring or intrusion detection capabilities. The attack surface is expanded by the fact that the vulnerability exists in a content management system's administrative interface, potentially providing attackers with additional privileges or access to sensitive administrative functions. Security controls such as web application firewalls or network-based filtering may not effectively prevent this attack since the requests appear legitimate to external systems. The vulnerability's classification as server-side request forgery also suggests potential integration with other attack techniques, including potential credential theft or session hijacking if the application maintains authentication state or if internal systems are not properly secured. Organizations should consider the broader implications of this vulnerability within their security architecture, as it represents a fundamental breakdown in the application's trust boundaries and access control mechanisms. The exploitation of this vulnerability can lead to cascading security issues where a single compromised endpoint becomes a gateway for more extensive network infiltration.
Mitigation strategies for CVE-2022-28090 should prioritize immediate patching of the Jspxcms application to the latest version that addresses this vulnerability. Organizations should implement network-level restrictions that prevent the application from making outbound requests to internal network resources or to known malicious domains. The implementation of proper input validation and URL sanitization mechanisms within the application's codebase is essential to prevent similar issues from occurring in other components. Security teams should deploy network monitoring solutions that can detect unusual outbound requests from the application server, particularly those targeting internal IP ranges or suspicious external domains. The application should be configured to operate in a restricted network environment with minimal outbound connectivity requirements, reducing the potential impact of successful exploitation. Organizations should also consider implementing web application firewalls or security proxies that can filter and validate URL parameters before they reach the vulnerable endpoint. Access controls should be strengthened to limit which users can access the vulnerable administrative interface, reducing the attack surface for potential exploitation. Regular security assessments and penetration testing should be conducted to identify similar vulnerabilities in other application components or third-party libraries. The vulnerability highlights the importance of secure coding practices and input validation, particularly for applications that handle external resource fetching. Organizations should also implement proper logging and alerting mechanisms to detect exploitation attempts and investigate any unusual activity related to the fetch_url.do endpoint. Additionally, network segmentation and privilege separation should be implemented to ensure that even if exploitation occurs, the attacker's access is limited to prevent further lateral movement within the network infrastructure. The remediation process should include thorough testing to ensure that the applied patches or mitigations do not introduce new functionality issues or break existing application capabilities while maintaining the security posture against this specific threat.