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Amazon Linux 2023 : nginx, nginx-all-modules, nginx-core (ALAS2023-2023-393)

critical Nessus Plugin ID 183347

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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 ALAS2023-2023-393 advisory.

 The HTTP/2 protocol allows a denial of service (server resource consumption) because request cancellation can reset many streams quickly, as exploited in the wild in August through October 2023. (CVE-2023-44487)

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

Run 'dnf update nginx --releasever 2023.2.20231016' to update your system.

See Also

https://alas.aws.amazon.com/AL2023/ALAS-2023-393.html

https://alas.aws.amazon.com/cve/html/CVE-2023-44487.html

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

Plugin Details

Severity: Critical

ID: 183347

File Name: al2023_ALAS2023-2023-393.nasl

Version: 1.6

Type: local

Agent: unix

Published: 10/19/2023

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: 6.1

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 6.4

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

CVSS Score Source: CVE-2023-44487

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 7

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

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

CVSS v4

Risk Factor: Critical

Base Score: 9.3

Threat Score: 9.3

Threat Vector: CVSS:4.0/E:A

Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Vulnerability Information

CPE: p-cpe:/a:amazon:linux:nginx-core, p-cpe:/a:amazon:linux:nginx-mod-mail, p-cpe:/a:amazon:linux:nginx-debugsource, p-cpe:/a:amazon:linux:nginx-mod-http-xslt-filter-debuginfo, p-cpe:/a:amazon:linux:nginx-mod-http-xslt-filter, p-cpe:/a:amazon:linux:nginx-debuginfo, p-cpe:/a:amazon:linux:nginx-filesystem, p-cpe:/a:amazon:linux:nginx-mod-http-perl-debuginfo, p-cpe:/a:amazon:linux:nginx-core-debuginfo, p-cpe:/a:amazon:linux:nginx-mod-stream-debuginfo, p-cpe:/a:amazon:linux:nginx, p-cpe:/a:amazon:linux:nginx-mod-http-perl, p-cpe:/a:amazon:linux:nginx-mod-stream, p-cpe:/a:amazon:linux:nginx-mod-mail-debuginfo, p-cpe:/a:amazon:linux:nginx-all-modules, p-cpe:/a:amazon:linux:nginx-mod-devel, cpe:/o:amazon:linux:2023, p-cpe:/a:amazon:linux:nginx-mod-http-image-filter-debuginfo, p-cpe:/a:amazon:linux:nginx-mod-http-image-filter

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: 10/16/2023

Vulnerability Publication Date: 10/10/2023

CISA Known Exploited Vulnerability Due Dates: 10/31/2023

Reference Information

CVE: CVE-2023-44487

IAVB: 2023-B-0083-S