Overview
Node.js is a JavaScript runtime built on Chrome's V8 JavaScript engine. It offers an event-driven, non-blocking I/O model that makes it lightweight and efficient, and is widely used in server-side applications.
An HTTP Request Smuggling vulnerability has been identified in Node.js. The issue stems from the llhttp parser not correctly handling header fields that are not terminated with CLRF. This weakness allows attackers to perform HTTP Request Smuggling.
This vulnerability affects specific versions of the package and can result in unauthorized access. Details on affected versions and reproduction steps are provided below.
Details
Module Info
Affected packages: Node
Affected versions: 4.0 < 14.20.1, 16 < 16.17.1, 18 < 18.9.1
GitHub repository: https://github.com/nodejs/node
Published packages: https://github.com/nodejs/node/releases
Package manager: npm
Fixed in: Node.js NES version 12
Vulnerability Info
The issue stems from improper handling of header fields in the llhttp parser.
For instance, in a scenario where header fields are not properly terminated, if an attacker sends a specially crafted request, the system may misinterpret the request leading to HTTP Request Smuggling. This behavior can be exploited by attackers to manipulate the request flow.
This vulnerability is a result of flawed logic, and may allow attackers to smuggle requests between servers.
- https://hackerone.com/reports/1675191
- https://www.cve.org/CVERecord?id=CVE-2022-35256
Credits
- VVX7
Mitigation
This vulnerability is not fixed upstream due to the release line being EOL. Herodevs has issued patched builds under the NES (Never Ending Support) line.
- Update to a patched LTS version of Node.js.
- Leverage a commercial support partner like HeroDevs for post-EOL security.
Refer to the NES documentation for upgrade instructions.
