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FreeBSD : rubygem-resolv -- Possible denial of service (eed1a411-699b-11f0-91fe-000c295725e4)

high Nessus Plugin ID 242862

Synopsis

The remote FreeBSD host is missing one or more security-related updates.

Description

The version of FreeBSD installed on the remote host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the eed1a411-699b-11f0-91fe-000c295725e4 advisory.

 Manu reports:

 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.


Tenable has extracted the preceding description block directly from the FreeBSD security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Update the affected packages.

See Also

http://www.nessus.org/u?276fe40a

http://www.nessus.org/u?947b005c

Plugin Details

Severity: High

ID: 242862

File Name: freebsd_pkg_eed1a411699b11f091fe000c295725e4.nasl

Version: 1.1

Type: local

Published: 7/26/2025

Updated: 7/26/2025

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.4

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.7

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P

CVSS Score Source: CVE-2025-24294

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

CVSS v4

Risk Factor: High

Base Score: 8.7

Threat Score: 6.6

Threat Vector: CVSS:4.0/E:U

Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

Vulnerability Information

CPE: cpe:/o:freebsd:freebsd, p-cpe:/a:freebsd:freebsd:ruby, p-cpe:/a:freebsd:freebsd:ruby32, p-cpe:/a:freebsd:freebsd:ruby33, p-cpe:/a:freebsd:freebsd:ruby34, p-cpe:/a:freebsd:freebsd:ruby35, p-cpe:/a:freebsd:freebsd:rubygem-resolv

Required KB Items: Host/local_checks_enabled, Host/FreeBSD/release, Host/FreeBSD/pkg_info

Exploit Ease: No known exploits are available

Patch Publication Date: 7/25/2025

Vulnerability Publication Date: 7/12/2025

Reference Information

CVE: CVE-2025-24294