CVE-2017-16045 in jquery.js
Summary
by MITRE
`jquery.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 It has been unpublished by npm.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 • 02/14/2020
The vulnerability identified as CVE-2017-16045 represents a sophisticated supply chain attack targeting the npm package ecosystem through a malicious module named jquery.js. This attack demonstrates how attackers can exploit the trust placed in popular software packages to gain unauthorized access to development environments and potentially compromise entire systems. The malicious module was designed to masquerade as the legitimate jQuery library, a widely used JavaScript framework that developers rely on for web application development. The attack specifically targeted environment variable manipulation, which serves as a critical vector for privilege escalation and system compromise.
The technical flaw in this vulnerability resides in the package management ecosystem's trust model where developers automatically install packages without sufficient verification of package integrity or author authenticity. The malicious jquery.js module was crafted to appear legitimate by using a well-known package name and versioning scheme that would pass cursory inspection by developers. When developers installed this package, it would execute malicious code that could read, modify, or exfiltrate environment variables from the system. This approach aligns with attack patterns described in the MITRE ATT&CK framework under the T1059.001 technique for command and scripting interpreter, where attackers leverage legitimate system tools and packages to execute malicious code. The vulnerability also maps to CWE-494 as it involves the download and execution of partially trusted code that can result in unauthorized access and privilege escalation.
The operational impact of this vulnerability extends beyond individual developer machines to potentially affect entire development pipelines and deployment environments. When developers unknowingly install malicious packages, they expose their systems to various attack vectors including credential theft, privilege escalation, and data exfiltration. The environment variable hijacking capability allows attackers to access sensitive information such as API keys, database credentials, and other authentication tokens that are commonly stored in environment variables. This type of attack can lead to significant security breaches when developers use compromised environments for continuous integration and deployment processes, potentially allowing attackers to gain access to production systems. The vulnerability demonstrates how attackers can leverage the trust relationship between package managers and developers to establish persistent access to development environments.
Mitigation strategies for this vulnerability require a multi-layered approach to supply chain security. Organizations should implement package integrity verification mechanisms such as npm audit and package-lock.json files to ensure package authenticity and prevent unauthorized modifications. Developers should be trained to verify package authors and maintain updated security practices including regular package audits and dependency scanning. The use of private package registries with strict access controls can help prevent unauthorized package publishing and reduce exposure to malicious modules. Security teams should establish monitoring procedures to detect anomalous package installations and implement automated security scanning in development environments. Additionally, organizations should consider implementing software composition analysis tools that can identify and flag potentially malicious packages before they are installed, thereby reducing the risk of supply chain attacks that exploit the trust model inherent in package management systems. The vulnerability highlights the critical importance of supply chain security practices and the need for organizations to treat package management as a security-critical component of their overall security posture.