Vulnerability · Published Sep 2, 2024 · Assigned by VulDB
CVE-2020-36830nescalante urlregex Backtracking index.js redos
Medium 4.3
In plain English
A medium-severity regular-expression denial of service in urlregex from nescalante. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.8% (higher than 57% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| npm | urlregex | 0.5.1 | GHSA-rw72-v6c7-hf9r |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| nescalante | urlregex | 0.10.20.30.40.5 |
Weakness: CWE-1333 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
References
- VDB-276269 | nescalante urlregex Backtracking index.js redos vdb-entry
- VDB-276269 | CTI Indicators (IOB, IOC, TTP, IOA) signature, permissions-required
- https://github.com/nescalante/urlregex/pull/8 exploit, issue-tracking
- https://github.com/nescalante/urlregex/commit/e5a085afe6abfaea1d1a78f54c45af9ef43ca1f9 patch
- https://github.com/nescalante/urlregex/releases/tag/v0.5.1 patch