CVE-2017-16047 in mysqljs
Summary
by MITRE
mysqljs 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 It has been unpublished by npm.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 • 02/09/2020
The vulnerability identified as CVE-2017-16047 represents a sophisticated supply chain attack targeting the npm package ecosystem through the malicious mysqljs module. This incident demonstrates how attackers can exploit the trust model of package managers to compromise developer environments and potentially gain unauthorized access to sensitive data. The module was designed to appear legitimate by mimicking the popular mysql package name, creating a deceptive environment where unsuspecting developers would install the malicious version alongside or instead of the legitimate package. The attack vector relied on the inherent trust developers place in npm package names and the automated installation processes that occur during development workflows.
The technical flaw in this vulnerability resides in the package name collision attack pattern where the malicious module specifically targeted the mysqljs namespace to deceive users into installing compromised code. The module was crafted to read and exfiltrate environment variables from the victim's system, effectively creating a backdoor that could access sensitive configuration data, database credentials, and other critical information stored in environment variables. This type of attack aligns with CWE-494, which addresses the vulnerability of accepting or executing untrusted code, and specifically targets the trust model of package managers. The malicious code would typically execute during normal package installation or runtime, making detection challenging since it appeared to be a legitimate part of the development environment.
The operational impact of this vulnerability extends beyond simple credential theft, as it represents a fundamental breach of trust in the npm ecosystem that affected countless developers and organizations. When developers installed what they believed to be the legitimate mysql package, they inadvertently executed code that could monitor their environment variables and potentially forward this information to attackers. The attack could have led to unauthorized access to production databases, exposure of API keys, and compromise of entire development environments. Organizations relying on npm-based workflows would have been vulnerable to this attack even if they implemented standard security controls, as the compromise occurred at the package installation level rather than through traditional application vulnerabilities. This incident highlighted the critical need for package verification mechanisms and underscored how supply chain attacks can affect the broader software development lifecycle.
Mitigation strategies for this vulnerability required immediate action from the npm community including the complete removal of the malicious package from the registry and notification of affected users. Organizations should have implemented package verification procedures, including checksum validation, dependency monitoring, and regular security audits of their npm dependencies. The incident reinforced the importance of using private package registries, implementing package signing, and maintaining comprehensive inventory of all installed packages. From an ATT&CK framework perspective, this attack maps to T1133 - External Remote Services and T1059 - Command and Scripting Interpreter, demonstrating how attackers can leverage package managers as initial access vectors. Additionally, organizations should have established security monitoring for unusual package installation patterns and implemented automated tools to detect and prevent installation of suspicious packages. The vulnerability also highlighted the necessity of developer security training to recognize deceptive package names and understand the risks associated with automated package installation processes.