SB2019121217 - Multiple vulnerabilities in npm package for Node.js

Description

This security bulletin contains information about 2 secuirty vulnerabilities.

1) Path traversal (CVE-ID: N/A)

The vulnerability allows a remote attacker to perform directory traversal attacks.

The vulnerability exists due to input validation error when processing directory traversal sequences within package.json files. A remote attacker can overwrite arbitrary files on the system outside of the intended node_modules folder through the bin field.

2) Symlink following (CVE-ID: CVE-2019-16775)

The vulnerability allows a remote attacker to perform directory traversal attacks.

Versions of the npm CLI prior to 6.13.3 are vulnerable to a symlink reference outside of node_modules. It is possible for packages to create symlinks to files outside of the node_modules folder through the bin field upon installation. A properly constructed entry in the package.json bin field would allow a package publisher to create a symlink pointing to arbitrary files on a user’s system when the package is installed. Only files accessible by the user running the npm install are affected.

Remediation

Install update from vendor's website.

References

• https://www.npmjs.com/advisories/1434
• https://www.npmjs.com/advisories/1436