Apache Tomcat 8.5.x < 8.5.83 Request Smuggling Vulnerability

high Nessus Plugin ID 166807


The remote Apache Tomcat server is affected by a request smuggling vulnerability


The version of Tomcat installed on the remote host is 8.5.x prior to 8.5.83. It is, therefore, affected by a request smuggling vulnerability as referenced in the fixed_in_apache_tomcat_8.5.83_security-8 advisory. If Tomcat was configured to ignore invalid HTTP headers via setting rejectIllegalHeader to false (the default), Tomcat did not reject a request containing an invalid Content-Length header making a request smuggling attack possible if Tomcat was located behind a reverse proxy that also failed to reject the request with the invalid header.

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


Upgrade to Apache Tomcat version 8.5.83 or later.

See Also



Plugin Details

Severity: High

ID: 166807

File Name: tomcat_8_5_83.nasl

Version: 1.6

Type: combined

Agent: windows, macosx, unix

Family: Web Servers

Published: 11/2/2022

Updated: 5/6/2024

Supported Sensors: Nessus Agent, Nessus

Risk Information


Risk Factor: Low

Score: 3.6


Risk Factor: High

Base Score: 7.8

Temporal Score: 5.8

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

CVSS Score Source: CVE-2022-42252


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:H/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: 10/31/2022

Vulnerability Publication Date: 10/31/2022

Reference Information

CVE: CVE-2022-42252

IAVA: 2022-A-0457-S