CVE-2017-16075 in http-proxy.js
Summary
by MITRE
http-proxy.js was a malicious module published with the intent to hijack environment variables. It has been unpublished by npm.
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Analysis
by VulDB Data Team • 02/15/2020
The vulnerability identified as CVE-2017-16075 represents a sophisticated supply chain attack targeting the node.js package ecosystem through the npm registry. This malicious module named http-proxy.js was designed to exploit the trust model inherent in package managers by masquerading as a legitimate networking utility. The module's creators intended to leverage the widespread adoption of http-proxy as a dependency in numerous applications, creating a vector for unauthorized access to sensitive environment variables. The attack demonstrates the critical security implications of trusting third-party packages without proper verification mechanisms, particularly within the open source software supply chain where developers often assume that published modules are benign.
The technical flaw embedded within this malicious module operates through a carefully crafted deception mechanism that exploits the npm package installation process. When developers installed the http-proxy.js package, it would execute code that specifically targeted and exfiltrated environment variables from the system where it was installed. The module was designed to bypass typical security checks by appearing legitimate in its package metadata and documentation, while containing hidden malicious payloads. This approach aligns with common attack patterns documented in the attack tactics and techniques framework, particularly those related to credential access and privilege escalation through compromised software dependencies. The vulnerability essentially represents a form of package tampering that leverages the trust relationships within package management systems.
The operational impact of this vulnerability extends far beyond individual package installations, as it could potentially compromise entire development environments and production systems where applications rely on the http-proxy.js module. The stolen environment variables might contain sensitive configuration data, API keys, database credentials, or other authentication tokens that could be used for further attacks within the compromised infrastructure. Organizations using vulnerable versions of this module could experience unauthorized access to their systems, data breaches, and potential lateral movement within their network environments. This attack vector is particularly dangerous because it can silently operate in the background without obvious signs of compromise, making detection and incident response significantly more challenging.
The remediation strategy for this vulnerability required immediate action from the npm registry administrators who promptly unpublished the malicious package to prevent further installations. Developers needed to audit their dependency trees and remove any instances of the compromised module from their projects. Organizations should implement comprehensive package verification processes including checksum validation, code review of critical dependencies, and regular security scanning of their software supply chain. This incident highlighted the importance of adhering to security best practices such as maintaining updated dependency lists, implementing package signature verification where available, and establishing secure development practices that minimize trust assumptions in external packages. The vulnerability serves as a critical reminder of the need for continuous monitoring and validation of software dependencies in modern application development environments.