Detections
Analytics

Debian dla-4057 : openssh-client - security update

medium Nessus Plugin ID 216406

Language:

Synopsis

The remote Debian host is missing a security-related update.

Description

The remote Debian 11 host has packages installed that are affected by a vulnerability as referenced in the dla-4057 advisory.

 ------------------------------------------------------------------------- Debian LTS Advisory DLA-4057-1 [email protected] https://www.debian.org/lts/security/ Colin Watson February 18, 2025 https://wiki.debian.org/LTS
 -------------------------------------------------------------------------

 Package : openssh Version : 1:8.4p1-5+deb11u4 CVE ID : CVE-2025-26465

 The Qualys Threat Research Unit (TRU) discovered that the OpenSSH client is vulnerable to a machine-in-the-middle attack if the VerifyHostKeyDNS option is enabled (disabled by default).

 Details can be found in the Qualys advisory at https://www.qualys.com/2025/02/18/openssh-mitm-dos.txt

 For Debian 11 bullseye, this problem has been fixed in version 1:8.4p1-5+deb11u4.

 We recommend that you upgrade your openssh packages.

 For the detailed security status of openssh please refer to its security tracker page at:
 https://security-tracker.debian.org/tracker/openssh

 Further information about Debian LTS security advisories, how to apply these updates to your system and frequently asked questions can be found at: https://wiki.debian.org/LTS Attachment:
 signature.asc Description: PGP signature

Tenable has extracted the preceding description block directly from the Debian 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

Upgrade the openssh-client packages.

See Also

https://security-tracker.debian.org/tracker/source-package/openssh

https://security-tracker.debian.org/tracker/CVE-2025-26465

https://packages.debian.org/source/bullseye/openssh

Plugin Details

Severity: Medium

ID: 216406

File Name: debian_DLA-4057.nasl

Version: 1.2

Type: local

Agent: unix

Published: 2/18/2025

Updated: 2/19/2025

Supported Sensors: Agentless Assessment, Continuous Assessment, Frictionless Assessment Agent, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 5.6

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: p-cpe:/a:debian:debian_linux:ssh-askpass-gnome, cpe:/o:debian:debian_linux:11.0, p-cpe:/a:debian:debian_linux:openssh-server-udeb, p-cpe:/a:debian:debian_linux:ssh, p-cpe:/a:debian:debian_linux:openssh-sftp-server, p-cpe:/a:debian:debian_linux:openssh-server, p-cpe:/a:debian:debian_linux:openssh-tests, p-cpe:/a:debian:debian_linux:openssh-client, p-cpe:/a:debian:debian_linux:openssh-client-udeb

Required KB Items: Host/local_checks_enabled, Host/Debian/release, Host/Debian/dpkg-l

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 2/18/2025

Vulnerability Publication Date: 2/18/2025

Reference Information

CVE: CVE-2025-26465