CVE-2020-36830 nescalante urlregex Backtracking index.js redos
Remote attackers can cause denial of service via inefficient regular expression complexity in the urlregex library.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2020-36830?
CVE-2020-36830 is a medium-severity denial of service vulnerability in nescalante urlregex, published on 2 Sep 2024. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A vulnerability was found in nescalante urlregex up to 0.5.0 and classified as problematic. This issue affects some unknown processing of the file index.js of the component Backtracking. The manipulation leads to inefficient regular expression complexity. The attack may be initiated remotely. The exploit has been disclosed to the public and may be used. Upgrading to version 0.5.1 is able to address this issue. The identifier of the patch is e5a085afe6abfaea1d1a78f54c45af9ef43ca1f9. It is recommended to upgrade the affected component.
Weakness: CWE-1333
Which versions are affected by CVE-2020-36830?
2 open source packages ship an affected version, including urlregex. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
urlregex npm | All versions | 0.5.1 |
urlregex npm | All versions | 0.5.1 |
Products include Nescalante Urlregex.
How do I fix CVE-2020-36830?
Upgrade urlregex to 0.5.1 or later.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2020-36830 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2020-36830 exists.
Sources
Also known as GHSA-rw72-v6c7-hf9r.