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Amazon Linux 2 : tomcat, --advisory ALAS2TOMCAT9-2023-005 (ALASTOMCAT9-2023-005)

low Nessus Plugin ID 181989

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Synopsis

The remote Amazon Linux 2 host is missing a security update.

Description

The version of tomcat installed on the remote host is prior to 9.0.65-1. It is, therefore, affected by a vulnerability as referenced in the ALAS2TOMCAT9-2023-005 advisory.

 The simplified implementation of blocking reads and writes introduced in Tomcat 10 and back-ported to Tomcat 9.0.47 onwards exposed a long standing (but extremely hard to trigger) concurrency bug in Apache Tomcat 10.1.0 to 10.1.0-M12, 10.0.0-M1 to 10.0.18, 9.0.0-M1 to 9.0.60 and 8.5.0 to 8.5.77 that could cause client connections to share an Http11Processor instance resulting in responses, or part responses, to be received by the wrong client. (CVE-2021-43980)

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 'yum update tomcat' or or 'yum update --advisory ALAS2TOMCAT9-2023-005' to update your system.

See Also

https://alas.aws.amazon.com//AL2/ALAS2TOMCAT9-2023-005.html

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

https://explore.alas.aws.amazon.com/CVE-2021-43980.html

Plugin Details

Severity: Low

ID: 181989

File Name: al2_ALASTOMCAT9-2023-005.nasl

Version: 1.2

Type: local

Agent: unix

Published: 9/27/2023

Updated: 9/24/2025

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

Risk Information

VPR

Risk Factor: Low

Score: 2.2

CVSS v2

Risk Factor: Low

Base Score: 2.6

Temporal Score: 1.9

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

CVSS Score Source: CVE-2021-43980

CVSS v3

Risk Factor: Low

Base Score: 3.7

Temporal Score: 3.2

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

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

Vulnerability Information

CPE: cpe:/o:amazon:linux:2, p-cpe:/a:amazon:linux:tomcat-servlet-4.0-api, p-cpe:/a:amazon:linux:tomcat-jsvc, p-cpe:/a:amazon:linux:tomcat-admin-webapps, p-cpe:/a:amazon:linux:tomcat-el-3.0-api, p-cpe:/a:amazon:linux:tomcat, p-cpe:/a:amazon:linux:tomcat-lib, p-cpe:/a:amazon:linux:tomcat-docs-webapp, p-cpe:/a:amazon:linux:tomcat-jsp-2.3-api, p-cpe:/a:amazon:linux:tomcat-webapps

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

Exploit Ease: No known exploits are available

Patch Publication Date: 8/21/2023

Vulnerability Publication Date: 4/1/2022

Reference Information

CVE: CVE-2021-43980

IAVA: 2022-A-0457-S