A vulnerability was found in markdown-it up to 2.x. It has been classified as problematic. Affected is an unknown function of the file lib/common/html_re.js. The manipulation leads to inefficient regular expression complexity. Upgrading to version 3.0.0 is able to address this issue. The name of the patch is 89c8620157d6e38f9872811620d25138fc9d1b0d. It is recommended to upgrade the affected component. The identifier of this vulnerability is VDB-216852.
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 |
|---|---|---|---|
| Markdown-it | Markdown-it_project | * | 3.0.0 (excluding) |
| Node-markdown-it | Ubuntu | kinetic | * |
| Node-markdown-it | Ubuntu | lunar | * |
| Node-markdown-it | Ubuntu | mantic | * |
| Node-markdown-it | Ubuntu | trusty | * |
| Node-markdown-it | 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.