Fedora 38 : openssh (2023-123647648e)

medium Nessus Plugin ID 174527

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Synopsis

The remote Fedora host is missing one or more security updates.

Description

The remote Fedora 38 host has a package installed that is affected by a vulnerability as referenced in the FEDORA-2023-123647648e advisory.

- OpenSSH server (sshd) 9.1 introduced a double-free vulnerability during options.kex_algorithms handling.
This is fixed in OpenSSH 9.2. The double free can be leveraged, by an unauthenticated remote attacker in the default configuration, to jump to any location in the sshd address space. One third-party report states remote code execution is theoretically possible. (CVE-2023-25136)

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 openssh package.

See Also

https://bodhi.fedoraproject.org/updates/FEDORA-2023-123647648e

Plugin Details

Severity: Medium

ID: 174527

File Name: fedora_2023-123647648e.nasl

Version: 1.0

Type: local

Agent: unix

Published: 4/20/2023

Updated: 4/20/2023

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

Risk Information

VPR

Risk Factor: Medium

Score: 5.0

CVSS v2

Risk Factor: Medium

Base Score: 6.1

Temporal Score: 4.8

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

CVSS Score Source: CVE-2023-25136

CVSS v3

Risk Factor: Medium

Base Score: 6.5

Temporal Score: 5.9

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

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

Vulnerability Information

CPE: cpe:/o:fedoraproject:fedora:38, p-cpe:/a:fedoraproject:fedora:openssh

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

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 4/14/2023

Vulnerability Publication Date: 2/3/2023

Reference Information

CVE: CVE-2023-25136

FEDORA: 2023-123647648e

IAVA: 2023-A-0073-S