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Add CVE-2024-43398: DoS vulnerability in REXML #3348

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Aug 22, 2024
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Add CVE-2024-43398: DoS vulnerability in REXML #3348

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31 changes: 31 additions & 0 deletions en/news/_posts/2024-08-22-dos-rexml-cve-2024-43398.md
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---
layout: news_post
title: "CVE-2024-43398: DoS vulnerability in REXML"
author: "kou"
translator:
date: 2024-08-22 03:00:00 +0000
tags: security
lang: en
---

There is a DoS vulnerability in REXML gem. This vulnerability has been assigned the CVE identifier [CVE-2024-43398](https://www.cve.org/CVERecord?id=CVE-2024-43398). We strongly recommend upgrading the REXML gem.

## Details

When parsing an XML that has many deep elements that have same local name attributes.
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Seeing several previous articles, I think this would be appropriate. How do you think?

Suggested change
When parsing an XML that has many deep elements that have same local name attributes.
When parsing an XML that has many deep elements that have same local name attributes, REXML gem may take long time.

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👍

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Thanks. Could you open a PR for this?

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#3354


It's only affected with the tree parser API. If you're using `REXML::Document.new` to parse an XML, you may be affected.

Please update REXML gem to version 3.3.6 or later.

## Affected versions

* REXML gem 3.3.5 or prior

## Credits

Thanks to [l33thaxor](https://hackerone.com/l33thaxor) for discovering this issue.

## History

* Originally published at 2024-08-22 03:00:00 (UTC)