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Add CVE-2025-25186: DoS vulnerability in net-imap #3489

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29 changes: 29 additions & 0 deletions en/news/_posts/2025-02-11-dos-net-imap-cve-2025-25186.md
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---
layout: news_post
title: "CVE-2025-25186: DoS vulnerability in net-imap"
author: "nevans"
translator:
date: 2025-02-11 03:00:00 +0000
tags: security
lang: en
---

There is a possibility for DoS by in the net-imap gem. This vulnerability has been assigned the CVE identifier [CVE-2025-25186](https://www.cve.org/CVERecord?id=CVE-2025-25186). We recommend upgrading the net-imap gem.

## Details

A malicious server can send highly compressed uid-set data which is automatically read by the client's receiver thread. The response parser uses Range#to_a to convert the uid-set data into arrays of integers, with no limitation on the expanded size of the ranges.

Please update net-imap gem to version 0.3.8, 0.4.19, 0.5.6, or later.

## Affected versions

* net-imap gem between 0.3.2 and 0.3.8, 0.4.0 and 0.4.19, or 0.5.0 and 0.5.6

## Credits

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

## History

* Originally published at 2025-02-11 03:00:00 (UTC)