Vulnerability in Apache Tomcat
CVE-2023-42794
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.
EPSS: 0.019 (77.0th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H.
Affected products
- Apache Tomcat
- Apache Software Foundation Tomcat — versions 9.0.70, 8.5.85, 10.0.0-M1
Weakness classification (CWE)
Public proof-of-concept exploits
References
- security@apache.org (vendor-advisory, Mailing List, Vendor Advisory)
- af854a3a-2127-422b-91ae-364da2661108 (Mailing List, Third Party Advisory)
Frequently asked questions
- What is CVE-2023-42794?
- CVE-2023-42794 is a medium-severity vulnerability in Apache Tomcat, classified under Incomplete Cleanup. CVSS score: 5.9/10. Published 2023-10-10.
- How severe is CVE-2023-42794?
- Medium severity. CVSS v3 base score is 5.9 out of 10.
- Is CVE-2023-42794 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.