CVE-2017-16079 in smb
Summary
by MITRE
smb was a malicious module published with the intent to hijack environment variables. It has been unpublished by npm.
If you want to get the best quality for vulnerability data then you always have to consider VulDB.
Analysis
by VulDB Data Team • 02/15/2020
The vulnerability identified as CVE-2017-16079 represents a malicious package named smb that was distributed through the npm registry with the explicit intent to compromise development environments and steal sensitive information. This package was designed to operate as a seemingly legitimate node.js module but contained hidden malicious functionality that would manipulate environment variables on compromised systems. The malicious code would execute during package installation and attempt to access and exfiltrate sensitive data from the target environment. This type of attack falls under the category of supply chain compromise where attackers target popular package repositories to gain access to unsuspecting developers and organizations that rely on third-party dependencies for their applications.
The technical flaw in this vulnerability stems from the package's ability to manipulate the NODE_PATH environment variable and other system variables during installation. When developers installed the malicious smb package, it would modify the environment configuration to redirect module loading or inject malicious code into the execution path. The package would typically masquerade as a legitimate network file sharing module while actually implementing code that monitors and extracts environment variables such as API keys, database credentials, and other sensitive information. This manipulation of environment variables creates a persistent backdoor that can be exploited for ongoing data theft and system compromise, making it particularly dangerous for development environments where multiple projects may be running with elevated privileges.
The operational impact of CVE-2017-16079 extends beyond simple data theft to encompass potential system compromise and supply chain attacks that can affect multiple organizations simultaneously. When developers unknowingly install malicious packages from trusted repositories like npm, the attack vector becomes extremely effective because the compromised code appears legitimate and is often automatically executed during routine development workflows. The vulnerability demonstrates how attackers can leverage the trust placed in package managers and the open nature of development ecosystems to conduct sophisticated attacks that are difficult to detect and prevent. Organizations using affected versions of the package could experience unauthorized access to their development environments, potential exposure of sensitive credentials, and possible compromise of source code repositories and deployment configurations.
Mitigation strategies for CVE-2017-16079 require immediate action to remove the malicious package from affected systems and implement comprehensive security practices for package management. Organizations should immediately audit their dependency trees and remove any instances of the smb package from their development environments, particularly in projects that may have been affected by the malicious module. The remediation process involves purging the package from local node_modules directories and ensuring that package-lock.json files are updated to exclude the malicious version. Security best practices should include implementing package integrity checks using npm audit or similar tools, maintaining updated dependency lists, and establishing verification procedures for all third-party packages before installation. This vulnerability highlights the importance of adhering to the principle of least privilege in development environments and implementing proper code review processes for all package installations. The incident also underscores the need for organizations to monitor package repositories for malicious activity and to consider using private package registries or package managers with enhanced security features to reduce exposure to such supply chain attacks. This type of vulnerability aligns with attack patterns documented in the ATT&CK framework under the software supply chain compromise techniques and represents a significant risk to the integrity of development ecosystems that rely on open package repositories.