Apache Tomcat 8.x < 8.5.78 Spring4Shell CVE-2021-43980

low Nessus Plugin ID 159462


The remote Apache Tomcat server is affected by a vulnerability


The version of Apache Tomcat installed on the remote host is 8.x prior to 8.5.78.

- 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)

Note : these changes are to mitigate the effects of CVE-2022-22965.


Upgrade to Apache Tomcat version 8.5.78 or later.

See Also



Plugin Details

Severity: Low

ID: 159462

File Name: tomcat_8_5_78.nasl

Version: 1.8

Type: combined

Agent: windows, macosx, unix

Family: Web Servers

Published: 4/1/2022

Updated: 5/6/2024

Configuration: Enable thorough checks

Supported Sensors: Nessus Agent, Nessus

Risk Information


Risk Factor: Low

Score: 1.4


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


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:/a:apache:tomcat:8

Required KB Items: installed_sw/Apache Tomcat

Exploit Ease: No known exploits are available

Patch Publication Date: 4/1/2022

Vulnerability Publication Date: 4/1/2022

Reference Information

CVE: CVE-2021-43980

IAVA: 2023-A-0534-S