CVE-2025-24294

Publication date 12 July 2025

Last updated 24 July 2025

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

7.5 · High

Score breakdown

Description

The attack vector is a potential Denial of Service (DoS). The vulnerability is caused by an insufficient check on the length of a decompressed domain name within a DNS packet. An attacker can craft a malicious DNS packet containing a highly compressed domain name. When the resolv library parses such a packet, the name decompression process consumes a large amount of CPU resources, as the library does not limit the resulting length of the name. This resource consumption can cause the application thread to become unresponsive, resulting in a Denial of Service condition.

Read the notes from the security team

Status

Package Ubuntu Release Status
ruby2.3 25.04 plucky Not in release
24.04 LTS noble Not in release
22.04 LTS jammy Not in release
16.04 LTS xenial
Needs evaluation
ruby2.5 25.04 plucky Not in release
24.04 LTS noble Not in release
22.04 LTS jammy Not in release
18.04 LTS bionic
Needs evaluation
ruby2.7 25.04 plucky Not in release
24.04 LTS noble Not in release
22.04 LTS jammy Not in release
20.04 LTS focal
Needs evaluation
ruby3.0 25.04 plucky Not in release
24.04 LTS noble Not in release
22.04 LTS jammy
Needs evaluation
ruby3.2 25.04 plucky Not in release
24.04 LTS noble
Needs evaluation
22.04 LTS jammy Not in release
ruby3.3 25.04 plucky
Needs evaluation
24.04 LTS noble Not in release
22.04 LTS jammy Not in release
jruby 25.04 plucky
Needs evaluation
24.04 LTS noble
Needs evaluation
22.04 LTS jammy Not in release
20.04 LTS focal
Needs evaluation
18.04 LTS bionic
Needs evaluation
16.04 LTS xenial
Needs evaluation
14.04 LTS trusty
Needs evaluation
rubygems 25.04 plucky
Vulnerable
24.04 LTS noble
Not affected
22.04 LTS jammy
Not affected

Notes

rodrigo-zaiden

CVE affects 'resolv' gem, which is bundled with ruby.

mdeslaur

versions are: Ruby 3.2 series: resolv version 0.2.2 and earlier Ruby 3.3 series: resolv version 0.3.0 Ruby 3.4 series: resolv version 0.6.1 and earlier

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package Patch details
ruby3.0
ruby3.2
ruby3.3
rubygems

Severity score breakdown

Parameter Value
Base score 7.5 · High
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Scope Unchanged
Confidentiality None
Integrity impact None
Availability impact High
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References

Other references