MooTools is a collection of JavaScript utilities for JavaScript developers. All known versions include a CSS selector parser that is vulnerable to Regular Expression Denial of Service (ReDoS). An attack requires that an attacker can inject a string into a CSS selector at runtime, which is quite common with e.g. jQuery CSS selectors. No patches are available for this issue.
The product uses a regular expression with an inefficient, possibly exponential worst-case computational complexity that consumes excessive CPU cycles.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Mootools | Mootools | * | 1.6.0 (including) |
| Mootools | Ubuntu | bionic | * |
| Mootools | Ubuntu | kinetic | * |
| Mootools | Ubuntu | lunar | * |
| Mootools | Ubuntu | mantic | * |
| Mootools | Ubuntu | trusty | * |
| Mootools | Ubuntu | xenial | * |
Attackers can create crafted inputs that
intentionally cause the regular expression to use
excessive backtracking in a way that causes the CPU
consumption to spike.