Amazon Linux AMI : amazon-ssm-agent (ALAS-2023-1866)

critical Nessus Plugin ID 183853

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Synopsis

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

Description

The version of amazon-ssm-agent installed on the remote host is prior to 3.2.1705.0-1. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS-2023-1866 advisory.

2023-10-30: CVE-2023-24540 was added to this advisory.

The x/crypto/ssh package before 0.0.0-20211202192323-5770296d904e of golang.org/x/crypto allows an attacker to panic an SSH server. (CVE-2021-43565)

http2/hpack: avoid quadratic complexity in hpack decoding (CVE-2022-41723)

Templates did not properly consider backticks (`) as Javascript string delimiters, and as such didnot escape them as expected. Backticks are used, since ES6, for JS template literals. If a templatecontained a Go template action within a Javascript template literal, the contents of the action couldbe used to terminate the literal, injecting arbitrary Javascript code into the Go template. (CVE-2023-24538)

html/template: improper handling of JavaScript whitespace.

Not all valid JavaScript whitespace characters were considered to be whitespace. Templates containing whitespace characters outside of the character set \t\n\f\r\u0020\u2028\u2029 in JavaScript contexts that also contain actions may not be properly sanitized during execution. (CVE-2023-24540)

Tenable has extracted the preceding description block directly from the tested product 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

Run 'yum update amazon-ssm-agent' to update your system.

Plugin Details

Severity: Critical

ID: 183853

File Name: ala_ALAS-2023-1866.nasl

Version: 1.2

Type: local

Agent: unix

Family: Amazon Linux Local Security Checks

Published: 10/25/2023

Updated: 12/11/2024

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

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: Critical

Base Score: 10

Temporal Score: 7.4

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

CVSS Score Source: CVE-2023-24540

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.5

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:U/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:amazon:linux:amazon-ssm-agent-debuginfo, cpe:/o:amazon:linux, p-cpe:/a:amazon:linux:amazon-ssm-agent

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

Exploit Ease: No known exploits are available

Patch Publication Date: 10/12/2023

Vulnerability Publication Date: 4/7/2022

Reference Information

CVE: CVE-2021-43565, CVE-2022-41723, CVE-2023-24538, CVE-2023-24540

IAVB: 2023-B-0012-S, 2023-B-0022-S

Detections

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