Apache Tomcat 9.0.0 < 9.0.45

high Nessus Plugin ID 197840

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Synopsis

The remote Apache Tomcat server is affected by a vulnerability

Description

The version of Tomcat installed on the remote host is prior to 9.0.45. It is, therefore, affected by a vulnerability as referenced in the fixed_in_apache_tomcat_9.0.45_security-9 advisory.

- A vulnerability in Apache Tomcat allows an attacker to remotely trigger a denial of service. An error introduced as part of a change to improve error handling during non-blocking I/O meant that the error flag associated with the Request object was not reset between requests. This meant that once a non-blocking I/O error occurred, all future requests handled by that request object would fail. Users were able to trigger non-blocking I/O errors, e.g. by dropping a connection, thereby creating the possibility of triggering a DoS. Applications that do not use non-blocking I/O are not exposed to this vulnerability. This issue affects Apache Tomcat 10.0.3 to 10.0.4; 9.0.44; 8.5.64. (CVE-2021-30639)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Upgrade to Apache Tomcat version 9.0.45 or later.

Plugin Details

Severity: High

ID: 197840

File Name: tomcat_9_0_45.nasl

Version: 1.1

Type: combined

Agent: windows, macosx, unix

Family: Web Servers

Published: 5/23/2024

Updated: 5/23/2024

Supported Sensors: Frictionless Assessment Agent, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3.6

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.7

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

CVSS Score Source: CVE-2021-30639

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

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:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/a:apache:tomcat:9

Required KB Items: installed_sw/Apache Tomcat

Exploit Ease: No known exploits are available

Patch Publication Date: 4/6/2021

Vulnerability Publication Date: 4/6/2021

Reference Information

CVE: CVE-2021-30639

Detections

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