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CVE-2024-21733 is an information-disclosure vulnerability in Apache Tomcat's default error-page handling. Under affected conditions, a default error page may include the body of an unrelated HTTP request, exposing request content to an unintended client. Apache Tomcat versions 8.5.7 through 8.5.63 and 9.0.0-M11 through 9.0.43 are affected; earlier end-of-life releases may also be affected.
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1 valid exploit after Mallory filtered fakes, detection scripts, and README-only repos.
This repository is a proof-of-concept (POC) exploit for CVE-2024-21733, targeting Apache Tomcat (specifically version 9.0.43 as per the provided docker-compose.yml). The exploit demonstrates how to trigger abnormal server behavior by sending HTTP POST requests with mismatched Content-Length headers to a custom JSP endpoint (vulnerable.jsp). The repository includes: - Python scripts: - CVE-2024-21733.py (main exploit script), - attacker.py (sends a crafted request to trigger the vulnerability), - victim.py (simulates normal user behavior for comparison). - ROOT/vulnerable.jsp: A simple JSP file that echoes the 'id' parameter from POST requests, to be deployed on the Tomcat server. - docker-compose.yml: Sets up a Tomcat 9.0.43 container with the vulnerable JSP deployed. - Readme.md: Provides setup and usage instructions, including environment requirements and exploitation steps. The exploit is network-based, targeting a local or accessible Tomcat server. It does not provide a weaponized payload but demonstrates the vulnerability by causing the server to return error messages or leak information when handling malformed HTTP requests. The repository is structured for easy testing in a controlled environment and is suitable for security researchers or administrators verifying the presence of CVE-2024-21733.
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An Apache Tomcat information-disclosure vulnerability in which unrelated request bodies can be leaked in the default error page.
An Apache Tomcat information-disclosure flaw in which the default error page can leak unrelated request bodies.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
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Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.