Node.js 8.5.0 gater than equal and less than 8.6.0 Directory Traversal

Node.js 8.5.0 before 8.6.0 allows remote attackers to access unintended files. The reason is that Node.js 8.5.0 has a logic error when performing the normalize operation on the directory, which leads to the jump to the upper level(such as ../../../foo/../../../../etc/passwd).

Impact:

This logic error causes the normalize function to return an error result, bypassing the check, and causing arbitrary file reading vulnerabilities.

Mitigation / Precaution

In order to patch this vulnerability, we suggest you to upgrade Node js to the latest version.

Written by

Rejah Rehim

Co-founder, Director

Rejah brings more than 12 years of industry experience in Information Technology. He is a fervent security enthusiast and serves as a Project Leader at OWASP Foundation, and Commander (Hon.) at Kerala Police. He has authored two books titled “Effective Python Penetration Testing” and “Python Penetration Testing Cookbook” and is the creator of 9 Mozilla add-ons.