Detections
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AlmaLinux 8 : openssh (ALSA-2025:16823)

medium Nessus Plugin ID 266343

Synopsis

The remote AlmaLinux host is missing a security update.

Description

The remote AlmaLinux 8 host has packages installed that are affected by a vulnerability as referenced in the ALSA-2025:16823 advisory.

 * openssh: Machine-in-the-middle attack if VerifyHostKeyDNS is enabled (CVE-2025-26465)

Tenable has extracted the preceding description block directly from the AlmaLinux 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://errata.almalinux.org/8/ALSA-2025-16823.html

https://access.redhat.com/errata/RHSA-2025:16823

Plugin Details

Severity: Medium

ID: 266343

File Name: alma_linux_ALSA-2025-16823.nasl

Version: 1.1

Type: local

Published: 10/1/2025

Updated: 10/1/2025

Supported Sensors: Nessus Agent, Continuous Assessment, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: High

Base Score: 7.1

Temporal Score: 5.6

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

CVSS Score Source: CVE-2025-26465

CVSS v3

Risk Factor: Medium

Base Score: 6.8

Temporal Score: 6.1

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

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

Vulnerability Information

CPE: cpe:/o:alma:linux:8::nfv, cpe:/o:alma:linux:8::sap_hana, cpe:/o:alma:linux:8::resilientstorage, p-cpe:/a:alma:linux:openssh-keycat, p-cpe:/a:alma:linux:openssh, p-cpe:/a:alma:linux:openssh-clients, cpe:/o:alma:linux:8::appstream, cpe:/o:alma:linux:8, p-cpe:/a:alma:linux:openssh-server, p-cpe:/a:alma:linux:openssh-askpass, p-cpe:/a:alma:linux:pam_ssh_agent_auth, cpe:/o:alma:linux:8::baseos, cpe:/o:alma:linux:8::realtime, cpe:/o:alma:linux:8::sap, cpe:/o:alma:linux:8::supplementary, p-cpe:/a:alma:linux:openssh-ldap, cpe:/o:alma:linux:8::highavailability, p-cpe:/a:alma:linux:openssh-cavs, cpe:/o:alma:linux:8::powertools

Required KB Items: Host/local_checks_enabled, Host/cpu, Host/AlmaLinux/release, Host/AlmaLinux/rpm-list

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 9/25/2025

Vulnerability Publication Date: 2/11/2025

Reference Information

CVE: CVE-2025-26465

CWE: 390

RHSA: 2025:16823