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CVE-2023-42794

Apache Tomcat: FileUpload: DoS due to accumulation of temporary files on Windows

Published: Oct 10, 2023Updated: Oct 29, 2025 Sources: CVE List NVD GHSA BDU csafCWE-459
NVD MITRE
5.9CVSSMEDIUM
EPSS Score
1.9%
Top 23.6%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

Description

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.

CVSS Vector Breakdown

AV:NAC:HPR:NUI:NS:UC:NI:NA:H
Exploitability
AV:NAttack Vector
Network
AC:HAttack Complexity
High
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:NIntegrity
None
A:HAvailability
High
Open in CVSS calculator →

Weaknesses

CWE-459

Affected Products

Red Hat Enterprise LinuxRed Hat Inc.
On-premOS
Operating Systems / linux-distro
Debian GNU/LinuxСообщество свободного программного обеспечения
On-premOS
Operating Systems / linux-distro
РЕД ОСООО «Ред Софт»
On-premOS
Operating Systems / linux-distro
РОСА ХРОМАО «НТЦ ИТ РОСА»
On-prem
Operating Systems / linux-distro
TomcatApache Software Foundation
On-premWeb App
Networking Infrastructure / load-balancer-proxy
red hat inc.commercialUSOperating Systemsaka red hat
сообщество свободного программного обеспеченияoss-projectOperating Systemsaka сообщество свободного программного обеспечения, fsf
ооо «ред софт»commercialRUOperating Systemsaka red soft
ао «нтц ит роса»commercialRUOperating Systems
apache software foundationoss-projectUSWeb & CMS Pluginsaka apache foundation
and 4 more affected products View all →

Exploitability

Official Patch Available

References

http://www.openwall.com/lists/oss-security/2023/10/10/8
openwall.com
https://lists.apache.org/thread/vvbr2ms7lockj1hlhz5q3wmxb2mwcw82
lists.apache.org
https://www.rapid7.com/db/vulnerabilities/apache-tomcat-cve-2023-42794/
rapid7.com
and 16 more references View all →

Timeline

Published
Oct 10, 2023
Last Updated
Oct 29, 2025

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