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FreeBSD : redis,valkey -- DoS Vulnerability due to unlimited growth of output buffers abused by unauthenticated client (af8d043f-20df-11f0-b9c5-000c295725e4)

high Nessus Plugin ID 234819

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 af8d043f-20df-11f0-b9c5-000c295725e4 advisory.

 Axel Mierczuk reports:

 By default, the Redis configuration does not limit the output buffer of normal clients (see client-output-buffer-limit). Therefore, the output buffer can grow unlimitedly over time. As a result, the service is exhausted and the memory is unavailable.


 When password authentication is enabled on the Redis server, but no password is provided, the client can still cause the output buffer to grow from NOAUTH responses until the system will run out of memory.


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

https://github.com/redis/redis/security/advisories/GHSA-r67f-p999-2gff

http://www.nessus.org/u?cc6f7f39

Plugin Details

Severity: High

ID: 234819

File Name: freebsd_pkg_af8d043f20df11f0b9c5000c295725e4.nasl

Version: 1.1

Type: local

Published: 4/24/2025

Updated: 4/24/2025

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.4

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 5.8

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

CVSS Score Source: CVE-2025-21605

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

Vulnerability Information

CPE: p-cpe:/a:freebsd:freebsd:redis, p-cpe:/a:freebsd:freebsd:redis72, cpe:/o:freebsd:freebsd, p-cpe:/a:freebsd:freebsd:valkey, p-cpe:/a:freebsd:freebsd:redis62

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

Exploit Ease: No known exploits are available

Patch Publication Date: 4/24/2025

Vulnerability Publication Date: 4/23/2025

Reference Information

CVE: CVE-2025-21605