CVE-2024-29025 – io.netty:netty-codec-http

Package

Manager: maven
Name: io.netty:netty-codec-http
Vulnerable Version: >=0 <4.1.108.final

Severity

Level: Medium

CVSS v3.1: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N

EPSS: 0.00048 pctl0.14258

Details

Netty's HttpPostRequestDecoder can OOM ### Summary The `HttpPostRequestDecoder` can be tricked to accumulate data. I have spotted currently two attack vectors ### Details 1. While the decoder can store items on the disk if configured so, there are no limits to the number of fields the form can have, an attacher can send a chunked post consisting of many small fields that will be accumulated in the `bodyListHttpData` list. 2. The decoder cumulates bytes in the `undecodedChunk` buffer until it can decode a field, this field can cumulate data without limits ### PoC Here is a Netty branch that provides a fix + tests : https://github.com/vietj/netty/tree/post-request-decoder Here is a reproducer with Vert.x (which uses this decoder) https://gist.github.com/vietj/f558b8ea81ec6505f1e9a6ca283c9ae3 ### Impact Any Netty based HTTP server that uses the `HttpPostRequestDecoder` to decode a form.

Metadata

Created: 2024-03-25T19:40:50Z
Modified: 2024-06-22T00:30:55Z
Source: https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2024/03/GHSA-5jpm-x58v-624v/GHSA-5jpm-x58v-624v.json
CWE IDs: ["CWE-770"]
Alternative ID: GHSA-5jpm-x58v-624v
Finding: F067
Auto approve: 1