Bug 2379684 (CVE-2025-24294)

Summary:	CVE-2025-24294 resolv: Denial of Service in resolv gem
Product:	[Other] Security Response	Reporter:	OSIDB Bzimport <bzimport>
Component:	vulnerability	Assignee:	Product Security DevOps Team <prodsec-dev>
Status:	NEW ---	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	jvasik, kaycoth, lchilton, rblanco, sfeifer, vmugicag, zdohnal
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	---
Doc Text:	A denial of service flaw was found in resolv ruby gem. This flaw allows an attacker to craft a malicious DNS packet containing a highly compressed domain name. When the resolv library parses this packet, the name decompression process consumes a large amount of CPU resources, as the library does not limit the resulting length of the name.	Story Points:	---
Clone Of:		Environment:
Last Closed:		Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description OSIDB Bzimport 2025-07-12 04:01:16 UTC

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.

Comment 2 errata-xmlrpc 2025-12-10 17:41:10 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2025:23063 https://access.redhat.com/errata/RHSA-2025:23063

Comment 3 errata-xmlrpc 2025-12-10 18:18:26 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2025:23062 https://access.redhat.com/errata/RHSA-2025:23062

Comment 4 errata-xmlrpc 2025-12-11 19:41:34 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10

Via RHSA-2025:23141 https://access.redhat.com/errata/RHSA-2025:23141

Comment 5 errata-xmlrpc 2025-12-18 12:27:49 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.6 Extended Update Support

Via RHSA-2025:23648 https://access.redhat.com/errata/RHSA-2025:23648

Comment 6 errata-xmlrpc 2025-12-22 16:42:38 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10.0 Extended Update Support

Via RHSA-2025:23927 https://access.redhat.com/errata/RHSA-2025:23927