CVE-2020-8205 in uppy Package
Summary
by MITRE
The uppy npm package < 1.13.2 and < 2.0.0-alpha.5 is vulnerable to a Server-Side Request Forgery (SSRF) vulnerability, which allows an attacker to scan local or external networks or otherwise interact with internal systems.
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Analysis
by VulDB Data Team • 07/20/2020
The uppy npm package version 1.13.1 and earlier, as well as versions before 2.0.0-alpha.5, contains a critical server-side request forgery vulnerability that exposes applications using this library to significant security risks. This vulnerability stems from inadequate input validation and sanitization within the package's network request handling mechanisms, allowing malicious actors to manipulate the application's behavior by injecting arbitrary URLs or network endpoints into requests that should be restricted to legitimate external services. The flaw exists in how the package processes user-supplied data when making HTTP requests to external resources, creating a pathway for attackers to bypass intended security boundaries and access internal network resources that should remain isolated from external access.
The technical implementation of this vulnerability allows attackers to exploit the package's request handling by manipulating parameters that control where network requests are directed. When applications using vulnerable versions of uppy process user uploads or file operations, they may inadvertently forward requests to attacker-controlled endpoints or internal network services that are normally protected from external access. This occurs because the package fails to properly validate or sanitize URLs and network endpoints specified by users or external inputs, enabling attackers to construct requests that traverse internal network boundaries. The vulnerability operates at the application layer and can be leveraged to perform network reconnaissance, access internal services, or even exfiltrate sensitive data from behind firewalls and network security controls. This type of vulnerability is classified under CWE-918 as Server-Side Request Forgery, which specifically addresses the risk of attackers manipulating server-side requests to access unauthorized resources.
The operational impact of this vulnerability extends beyond simple network scanning capabilities to encompass broader security implications for organizations deploying applications that utilize vulnerable versions of the uppy package. Attackers can potentially map internal network topologies, discover sensitive services running on internal ports, or even gain access to internal systems that are not exposed to the internet. The vulnerability is particularly dangerous in environments where applications are deployed in cloud or containerized environments where internal network boundaries may be less strictly enforced, or where applications have elevated privileges that could allow attackers to escalate their access once they gain initial foothold through the SSRF attack. Organizations using this package in production environments face potential data breaches, unauthorized system access, and network reconnaissance activities that could lead to more sophisticated attacks.
Mitigation strategies for this vulnerability require immediate action to upgrade to patched versions of the uppy package, specifically versions 1.13.2 or 2.0.0-alpha.5 and later, which contain proper input validation and sanitization mechanisms to prevent malicious URL manipulation. Security teams should conduct comprehensive inventory assessments to identify all applications and services using vulnerable versions of the package, implementing automated scanning tools to detect affected deployments. Network-level protections should include implementing strict egress controls and firewall rules to limit outbound network requests from applications, while also deploying web application firewalls that can detect and block suspicious request patterns. Organizations should also consider implementing runtime monitoring and anomaly detection systems that can identify unusual network behavior indicative of SSRF attacks. The remediation process must include thorough code reviews to ensure no hardcoded or improperly validated URLs exist in applications that use the uppy package, and security testing should be integrated into CI/CD pipelines to prevent reintroduction of vulnerable code. This vulnerability aligns with ATT&CK technique T1071.004 for application layer protocol manipulation and T1046 for network service scanning, making it a significant concern for organizations following established threat modeling frameworks.