Tomcat 8.5.x/9.0.x Commons FileUpload Incomplete Stream Deletion DoS
CVE-2023-42794 Published on October 10, 2023
Apache Tomcat: FileUpload: DoS due to accumulation of temporary files on Windows
Incomplete Cleanup vulnerability in Apache Tomcat.
The internal fork of Commons FileUpload packaged with Apache Tomcat 9.0.70 through 9.0.80 and 8.5.85 through 8.5.93 included an unreleased,
in progress refactoring that exposed a potential denial of service on
Windows if a web application opened a stream for an uploaded file but
failed to close the stream. The file would never be deleted from disk
creating the possibility of an eventual denial of service due to the
disk being full.
Other, EOL versions may also be affected.
Users are recommended to upgrade to version 9.0.81 onwards or 8.5.94 onwards, which fixes the issue.
Weakness Type
What is an Insufficient Cleanup Vulnerability?
The software does not properly "clean up" and remove temporary or supporting resources after they have been used.
CVE-2023-42794 has been classified to as an Insufficient Cleanup vulnerability or weakness.
Products Associated with CVE-2023-42794
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Affected Versions
Apache Software Foundation Apache Tomcat:- Version 9.0.70, <= 9.0.80 is affected.
- Version 8.5.85, <= 8.5.93 is affected.
- Version 10.0.0-M1, <= 10.0.27 is unknown.
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.