CVE-2017-16021

Description

uri-js is a module that tries to fully implement RFC 3986. One of these features is validating whether or not a supplied URL is valid or not. To do this, uri-js uses a regular expression, This regular expression is vulnerable to redos. This causes the program to hang and the CPU to idle at 100% usage while uri-js is trying to validate if the supplied URL is valid or not. To check if you're vulnerable, look for a call to `require("uri-js").parse()` where a user is able to send their own input. This affects uri-js 2.1.1 and earlier.

Weakness classification

• CWE-400: Uncontrolled Resource Consumption
• CWE-1333: Inefficient Regular Expression Complexity

Primary references

• support@hackerone.com — Exploit, Issue Tracking, Third Party Advisory
• support@hackerone.com — Broken Link, Third Party Advisory
• af854a3a-2127-422b-91ae-364da2661108 — Exploit, Issue Tracking, Third Party Advisory
• af854a3a-2127-422b-91ae-364da2661108 — Broken Link, Third Party Advisory