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.

Metrics

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploitation none

Automatable yes

Technical Impact partial

Affected Vendors & Products

No data.

No data.

No data.

References
Link Providers
https://nvd.nist.gov/vuln/detail/CVE-2025-24294 cve-icon
https://www.cve.org/CVERecord?id=CVE-2025-24294 cve-icon
https://www.ruby-lang.org/en/news/2025/07/08/dos-resolv-cve-2025-24294/ cve-icon cve-icon cve-icon cve-icon
History

Thu, 17 Jul 2025 00:15:00 +0000

Type Values Removed Values Added
Title resolv: Denial of Service in resolv gem
References
Metrics threat_severity

None

 threat_severity

Moderate

Wed, 16 Jul 2025 14:15:00 +0000

Type Values Removed Values Added
Metrics cvssV3_1

{'score': 5.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L'}

 cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}

Wed, 16 Jul 2025 13:45:00 +0000

Type Values Removed Values Added
Metrics epss

{'score': 0.00018}

 epss

{'score': 0.00011}

Tue, 15 Jul 2025 14:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-400
Metrics cvssV3_1

{'score': 5.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L'}

ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Sat, 12 Jul 2025 13:45:00 +0000

Type Values Removed Values Added
Metrics epss

{'score': 0.00018}

Sat, 12 Jul 2025 03:45:00 +0000

Type Values Removed Values Added
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.
References
cve-icon MITRE

Status: PUBLISHED

Assigner: hackerone

Published: 2025-07-12T03:30:40.226Z

Updated: 2025-07-16T13:37:43.395Z

Reserved: 2025-01-17T01:00:07.458Z

Link: CVE-2025-24294

cve-icon Vulnrichment

Updated: 2025-07-15T13:49:37.529Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2025-07-12T04:15:46.683

Modified: 2025-07-16T14:15:23.037

Link: CVE-2025-24294

cve-icon Redhat

Severity : Moderate

Publid Date: 2025-07-12T03:30:40Z

Links: CVE-2025-24294 - Bugzilla