CVE-2017-16059 in mssql-node
Summary
by MITRE
mssql-node 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 It has been unpublished by npm.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-2017-16059 represents a sophisticated supply chain attack targeting the node.js ecosystem through the npm package registry. This malicious module named mssql-node was designed to exploit the trust model inherent in package managers by masquerading as a legitimate database driver for microsoft sql server. The module's primary objective was to capture and exfiltrate environment variables from systems where it was installed, effectively creating a persistent backdoor for attackers to gain unauthorized access to sensitive configuration data and credentials stored in environment variables. The attack vector leveraged the common practice of developers installing third-party packages without sufficient verification of their authenticity or integrity.
The technical flaw within the mssql-node module exploited the npm package installation process by implementing malicious code that executed during the package's initialization phase. When developers installed this package as part of their application dependencies, the malicious code would automatically scan the system for environment variables and transmit them to attacker-controlled servers. The module's design incorporated techniques to avoid detection by security tools and package verification systems, making it particularly dangerous as it could bypass standard security measures that developers typically rely on for package validation. This vulnerability falls under the category of malicious package distribution and represents a significant threat to the integrity of software supply chains in the node.js ecosystem.
The operational impact of this vulnerability extended far beyond simple data exfiltration, as it compromised the foundational security of applications that relied on environment variables for storing sensitive information such as database credentials, API keys, and cryptographic secrets. Organizations using vulnerable versions of this package faced potential unauthorized access to their production systems and sensitive data repositories. The attack could have cascading effects across multiple applications and services that shared common environment variables, potentially leading to widespread compromise of organizational infrastructure. System administrators and security teams had to conduct extensive audits of their package dependencies to identify and remove the malicious module from their environments.
The remediation strategy for CVE-2017-16059 required immediate action from the npm community and affected organizations to remove the malicious package from their systems. The npm registry team worked swiftly to unpublish the malicious module, but the damage could have been done before detection. Organizations needed to implement comprehensive package verification processes and maintain updated inventories of their installed dependencies to prevent similar attacks. This incident highlighted the critical importance of package integrity verification and the need for more robust supply chain security measures in the npm ecosystem. The vulnerability demonstrates the necessity of implementing security controls such as npm audit, package signature verification, and regular dependency scanning to protect against malicious packages that exploit trust relationships within software ecosystems. This attack pattern aligns with techniques described in the attack tree model for supply chain compromises and represents a significant concern for the broader software development community. The incident underscored the importance of maintaining vigilance in package management practices and the potential for attackers to exploit the trust placed in package repositories.