RHEL 9 : openssh (RHSA-2026:0693)

low Nessus Plugin ID 286363

Synopsis

The remote Red Hat host is missing one or more security updates for openssh.

Description

The remote Redhat Enterprise Linux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2026:0693 advisory.

OpenSSH is an SSH protocol implementation supported by a number of Linux, UNIX, and similar operating systems. It includes the core files necessary for both the OpenSSH client and server.

Security Fix(es):

* openssh: OpenSSH: Control characters in usernames can lead to code execution via ProxyCommand (CVE-2025-61984)

* openssh: OpenSSH: Null character in ssh:// URI can lead to code execution via ProxyCommand (CVE-2025-61985)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

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

Solution

Update the RHEL openssh package based on the guidance in RHSA-2026:0693.

Plugin Details

Severity: Low

ID: 286363

File Name: redhat-RHSA-2026-0693.nasl

Version: 1.1

Type: local

Agent: unix

Family: Red Hat Local Security Checks

Published: 1/15/2026

Updated: 1/15/2026

Supported Sensors: Continuous Assessment, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.0

Vendor

Vendor Severity: Moderate

CVSS v2

Risk Factor: Medium

Base Score: 4.3

Temporal Score: 3.4

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

CVSS Score Source: CVE-2025-61985

CVSS v3

Risk Factor: Low

Base Score: 3.6

Temporal Score: 3.3

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

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

Vulnerability Information

CPE: p-cpe:/a:redhat:enterprise_linux:openssh-askpass, cpe:/o:redhat:rhel_eus:9.6, p-cpe:/a:redhat:enterprise_linux:openssh, p-cpe:/a:redhat:enterprise_linux:openssh-server, p-cpe:/a:redhat:enterprise_linux:openssh-keycat, p-cpe:/a:redhat:enterprise_linux:pam_ssh_agent_auth, p-cpe:/a:redhat:enterprise_linux:openssh-clients

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

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 1/15/2026

Vulnerability Publication Date: 10/6/2025

Reference Information

CVE: CVE-2025-61984, CVE-2025-61985

CWE: 158, 159

RHSA: 2026:0693

Detections

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