medium
5.3
CWE
770
EPSS
0.045%
Advisory Published
CVE Published
Updated

CVE-2024-29025: Netty HttpPostRequestDecoder can OOM

First published: Mon Mar 25 2024(Updated: )

### 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.

Credit: security-advisories@github.com security-advisories@github.com

Affected SoftwareAffected VersionHow to fix
maven/io.netty:netty-codec-http<4.1.108.Final
4.1.108.Final
redhat/io.netty.netty-codec-http<4.1.108.
4.1.108.
IBM Cognos Analytics<=12.0.0-12.0.3
IBM Cognos Analytics<=11.2.0-11.2.4 FP4

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Parent vulnerabilities

(Appears in the following advisories)

Frequently Asked Questions

  • What is the severity of CVE-2024-29025?

    CVE-2024-29025 has a moderate severity rating due to its potential for denial of service through excessive data accumulation.

  • How do I fix CVE-2024-29025?

    To address CVE-2024-29025, upgrade to version 4.1.108.Final of the io.netty:netty-codec-http package.

  • What are the affected software versions for CVE-2024-29025?

    CVE-2024-29025 affects versions prior to 4.1.108.Final of io.netty:netty-codec-http as well as specific versions of IBM Cognos Analytics.

  • What types of attacks are associated with CVE-2024-29025?

    CVE-2024-29025 can be exploited through denial of service attacks that leverage unlimited form field accumulations.

  • Is there a patch available for CVE-2024-29025?

    Yes, patches are available for affected versions of IBM Cognos Analytics and recommended upgrades for io.netty:netty-codec-http.

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