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FreeBSD : OpenSSH -- remote code execution via a forwarded agent socket (887eb570-27d3-11ee-adba-c80aa9043978)

critical Nessus Plugin ID 178713

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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 887eb570-27d3-11ee-adba-c80aa9043978 advisory.

 - The PKCS#11 feature in ssh-agent in OpenSSH before 9.3p2 has an insufficiently trustworthy search path, leading to remote code execution if an agent is forwarded to an attacker-controlled system. (Code in /usr/lib is not necessarily safe for loading into ssh-agent.) NOTE: this issue exists because of an incomplete fix for CVE-2016-10009. (CVE-2023-38408)

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://www.openssh.com/txt/release-9.3p2

http://www.nessus.org/u?7c81987e

Plugin Details

Severity: Critical

ID: 178713

File Name: freebsd_pkg_887eb57027d311eeadbac80aa9043978.nasl

Version: 1.1

Type: local

Published: 7/21/2023

Updated: 8/1/2023

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: Critical

Base Score: 10

Temporal Score: 7.8

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

CVSS Score Source: CVE-2023-38408

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.8

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

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

Vulnerability Information

CPE: p-cpe:/a:freebsd:freebsd:openssh-portable, p-cpe:/a:freebsd:freebsd:openssh-portable-gssapi, p-cpe:/a:freebsd:freebsd:openssh-portable-hpn, cpe:/o:freebsd:freebsd

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

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 7/21/2023

Vulnerability Publication Date: 7/20/2023

Reference Information

CVE: CVE-2023-38408