Apache Tomcat 8.0.x < 8.0.52 / 8.5.x < 8.5.31 / 9.0.x < 9.0.8 Denial of Service

high Nessus Plugin ID 121124
New! Plugin Severity Now Using CVSS v3

The calculated severity for Plugins has been updated to use CVSS v3 by default. Plugins that do not have a CVSS v3 score will fall back to CVSS v2 for calculating severity. Severity display preferences can be toggled in the settings dropdown.


The remote Apache Tomcat server is affected by a denial of service vulnerability.


According to its self-reported version number, the Apache Tomcat instance listening on the remote host is 8.0.x < 8.0.52, 8.5.x < 8.5.31 or 9.0.x < 9.0.8. It is, therefore, affected by the following vulnerability:

- A denial of service (DoS) vulnerability exists in Tomcat due to improper overflow handling in the UTF-8 decoder. An unauthenticated, remote attacker can exploit this issue to cause an infinite loop in the decoder, leading to a denial of service condition.

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


Upgrade to Apache Tomcat version 8.0.52 / 8.5.31 / 9.0.8 or later.

See Also




Plugin Details

Severity: High

ID: 121124

File Name: tomcat_8_0_52.nasl

Version: 1.5

Type: combined

Agent: windows, macosx, unix

Family: Web Servers

Published: 1/11/2019

Updated: 3/11/2020

Dependencies: tomcat_error_version.nasl, tomcat_win_installed.nbin, apache_tomcat_nix_installed.nbin

Risk Information

CVSS Score Source: CVE-2018-1336


Risk Factor: Low

Score: 3.6


Risk Factor: Medium

Base Score: 5

Temporal Score: 3.7

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

Temporal Vector: E:U/RL:OF/RC:C


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: E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/a:apache:tomcat

Required KB Items: installed_sw/Apache Tomcat

Exploit Ease: No known exploits are available

Patch Publication Date: 5/16/2018

Vulnerability Publication Date: 12/7/2017

Reference Information

CVE: CVE-2018-1336