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 1. Plugins
 2. Nessus
 3. 179760

 1. Nessus


AMAZON LINUX 2023 : OPENSSH, OPENSSH-CLIENTS, OPENSSH-KEYCAT (ALAS2023-2023-273)

CRITICAL NESSUS PLUGIN ID 179760

Language:

English
日本語简体中文繁體中文English
 * Information
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SYNOPSIS

The remote Amazon Linux 2023 host is missing a security update.


DESCRIPTION

It is, therefore, affected by a vulnerability as referenced in the
ALAS2023-2023-273 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

Run 'dnf update openssh --releasever 2023.1.20230809' to update your system.


SEE ALSO

https://alas.aws.amazon.com/AL2023/ALAS-2023-273.html

https://alas.aws.amazon.com/cve/html/CVE-2023-38408.html

https://alas.aws.amazon.com/faqs.html

PLUGIN DETAILS

Severity: Critical

ID: 179760

File Name: al2023_ALAS2023-2023-273.nasl

Version: 1.1

Type: local

Agent: unix

Family: Amazon Linux Local Security Checks

Published: 8/14/2023

Updated: 8/15/2023





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

RISK INFORMATION



VPR

Risk Factor: Medium

Score: 5.2

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:amazon:linux:openssh-server, cpe:/o:amazon:linux:2023,
p-cpe:/a:amazon:linux:openssh-server-debuginfo,
p-cpe:/a:amazon:linux:openssh-debuginfo,
p-cpe:/a:amazon:linux:openssh-clients-debuginfo,
p-cpe:/a:amazon:linux:pam_ssh_agent_auth-debuginfo,
p-cpe:/a:amazon:linux:openssh, p-cpe:/a:amazon:linux:openssh-debugsource,
p-cpe:/a:amazon:linux:openssh-keycat-debuginfo,
p-cpe:/a:amazon:linux:pam_ssh_agent_auth, p-cpe:/a:amazon:linux:openssh-clients,
p-cpe:/a:amazon:linux:openssh-keycat

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

Exploit Available: true

Exploit Ease: Exploits are available



Patch Publication Date: 8/3/2023

Vulnerability Publication Date: 7/20/2023



REFERENCE INFORMATION

CVE: CVE-2023-38408

IAVA: 2023-A-0377

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