CVE-2017-16080 in nodesass
Summary
by MITRE
nodesass 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 It has been unpublished by npm.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-2017-16080 represents a sophisticated supply chain attack targeting the npm package ecosystem through a malicious module named nodesass. This module was designed to exploit the trust model inherent in package managers by masquerading as a legitimate dependency while executing unauthorized behavior. The attack leveraged the common practice of developers installing packages without thorough security verification, creating an opportunity for malicious actors to compromise systems through seemingly benign software dependencies. The module's publication on the npm registry demonstrates how attackers can bypass traditional security measures by utilizing the platform's open nature and developer trust in published packages.
The technical flaw embedded within nodesass involved the module's ability to hijack and manipulate environment variables during the installation and execution process. This capability allowed the malicious code to access sensitive system information, potentially including authentication tokens, API keys, and other credential data stored in environment variables. The module exploited the fact that many applications rely on environment variables for configuration and security purposes, making it a prime target for attackers seeking to extract valuable information. The implementation likely involved intercepting or modifying environment variable access routines within the node.js runtime environment, creating a persistent backdoor for data exfiltration.
The operational impact of this vulnerability extended beyond simple credential theft, as it represented a fundamental breach of trust within the software development ecosystem. Organizations using npm packages were at risk of having their development environments compromised, potentially leading to unauthorized access to cloud resources, database connections, and other sensitive infrastructure components. The attack could have cascaded through development teams, affecting multiple projects and systems if the malicious module was installed as a dependency of other legitimate packages. The widespread use of npm packages meant that a single compromised module could potentially impact thousands of systems across different organizations.
The remediation approach for this vulnerability required immediate action from the npm registry to unpublish the malicious module and notify affected users. Organizations needed to audit their dependency trees and remove any instances of the nodesass module, while implementing more rigorous package verification processes. Security practitioners recommended establishing package integrity checks and using tools like npm audit or third-party dependency scanners to detect similar malicious modules. The incident highlighted the importance of maintaining updated security practices and the need for organizations to implement comprehensive software supply chain security measures. This vulnerability aligns with CWE-494, which addresses the improper handling of downloadable code, and represents a variant of the ATT&CK technique T1133, focusing on external remote services for credential access. The attack pattern demonstrates how attackers can leverage the trust relationships within software ecosystems to achieve unauthorized access, emphasizing the critical need for robust package verification and supply chain security protocols.