CVE-2024-21733

MEDIUM LAB

Apache Tomcat 8.5.7-8.5.63 and 9.0.0-M11-9.0.43 - Generation of Error Message Containing Sensitive Information

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2024-21733. PoCs published by LtmThink.

AI-analyzed exploit summary This repository contains a functional PoC for CVE-2024-21733, demonstrating a DoS vulnerability in Apache Tomcat 9.0.43 via crafted HTTP POST requests with mismatched Content-Length headers. The exploit triggers a timeout and error response by sending incomplete data, leveraging specific server-side conditions (English locale).

Description

Generation of Error Message Containing Sensitive Information vulnerability in Apache Tomcat.This issue affects Apache Tomcat: from 8.5.7 through 8.5.63, from 9.0.0-M11 through 9.0.43. Other, EOL versions may also be affected. Users are recommended to upgrade to version 8.5.64 onwards or 9.0.44 onwards, which contain a fix for the issue.

Exploits (1)

nomisec WORKING POC 27 stars
by LtmThink · poc
https://github.com/LtmThink/CVE-2024-21733

This repository contains a functional PoC for CVE-2024-21733, demonstrating a DoS vulnerability in Apache Tomcat 9.0.43 via crafted HTTP POST requests with mismatched Content-Length headers. The exploit triggers a timeout and error response by sending incomplete data, leveraging specific server-side conditions (English locale).

Classification
Working Poc 95%
Attack Type
Dos
Complexity
Moderate
Reliability
Reliable
Target: Apache Tomcat 9.0.43
No auth needed
Prerequisites: Tomcat 9.0.43 with English locale (-Duser.language=en -Duser.country=US) · Specific JSP file (vulnerable.jsp) deployed on the server
devstral-2 · analyzed Feb 18, 2026 Full analysis →

Scores

CVSS v3 5.3
EPSS 0.7095
EPSS Percentile 98.7%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact partial

Lab Environment

COMMUNITY
Community Lab
docker pull tomcat:9.0.43

Details

CWE
CWE-209
Status published
Products (4)
apache/tomcat 9.0.0 milestone11 (17 CPE variants)
apache/tomcat 8.5.7 - 8.5.64
org.apache.tomcat/tomcat-coyote 9.0.0-M11 - 9.0.44Maven
org.apache.tomcat.embed/tomcat-embed-core 8.5.7 - 8.5.64Maven
Published Jan 19, 2024
Tracked Since Feb 18, 2026