CVE-2024-23672: Apache Tomcat: WebSocket DoS with incomplete closing handshake

Published Mar 13, 2024
·
Updated

Denial of Service via incomplete cleanup vulnerability in Apache Tomcat. It was possible for WebSocket clients to keep WebSocket connections open leading to increased resource consumption.This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.0-M16, from 10.1.0-M1 through 10.1.18, from 9.0.0-M1 through 9.0.85, from 8.5.0 through 8.5.98.

Older, EOL versions may also be affected.

Users are recommended to upgrade to version 11.0.0-M17, 10.1.19, 9.0.86 or 8.5.99 which fix the issue.

Other sources

Denial of Service via incomplete cleanup vulnerability in Apache Tomcat. It was possible for WebSocket clients to keep WebSocket connections open leading to increased resource consumption.This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.0-M16, from 10.1.0-M1 through 10.1.18, from 9.0.0-M1 through 9.0.85, from 8.5.0 through 8.5.98.

Users are recommended to upgrade to version 11.0.0-M17, 10.1.19, 9.0.86 or 8.5.99 which fix the issue.

— GitHub

Affected Software

35 affected componentsFixes available
redhat/Apache Tomcat<11.0.0
11.0.0
redhat/Apache Tomcat<10.1.19
10.1.19
redhat/Apache Tomcat<9.0.86
9.0.86
redhat/Apache Tomcat<8.5.99
8.5.99
maven/org.apache.tomcat.embed:tomcat-embed-websocket>=8.5.0<=8.5.98
8.5.99
maven/org.apache.tomcat.embed:tomcat-embed-websocket>=9.0.0-M1<=9.0.85
9.0.86
maven/org.apache.tomcat.embed:tomcat-embed-websocket>=10.1.0-M1<=10.1.18
10.1.19
maven/org.apache.tomcat.embed:tomcat-embed-websocket>=11.0.0-M1<=11.0.0-M16
11.0.0-M17
maven/org.apache.tomcat:tomcat-websocket>=8.5.0<=8.5.98
8.5.99
maven/org.apache.tomcat:tomcat-websocket>=9.0.0-M1<=9.0.85
9.0.86
maven/org.apache.tomcat:tomcat-websocket>=10.1.0-M1<=10.1.18
10.1.19
maven/org.apache.tomcat:tomcat-websocket>=11.0.0-M1<=11.0.0-M16
11.0.0-M17
Apache Tomcat>=8.5.0<8.5.99
Apache Tomcat>=9.0.0<9.0.86
Apache Tomcat>=10.1.0<10.1.19
Apache Tomcat=11.0.0-milestone1
Apache Tomcat=11.0.0-milestone10
Apache Tomcat=11.0.0-milestone11
Apache Tomcat=11.0.0-milestone12
Apache Tomcat=11.0.0-milestone13
Apache Tomcat=11.0.0-milestone14
Apache Tomcat=11.0.0-milestone15
Apache Tomcat=11.0.0-milestone16
Apache Tomcat=11.0.0-milestone2
Apache Tomcat=11.0.0-milestone3
Apache Tomcat=11.0.0-milestone4
Apache Tomcat=11.0.0-milestone5
Apache Tomcat=11.0.0-milestone6
Apache Tomcat=11.0.0-milestone7
Apache Tomcat=11.0.0-milestone8
Apache Tomcat=11.0.0-milestone9
Debian Debian Linux=10.0
Fedoraproject Fedora=39
Fedoraproject Fedora=40
IBM API Connect V12 OnPrem<=All

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade redhat/Apache Tomcat to a version that resolves this vulnerability.

    Fixed in 11.0.0
  2. Upgrade

    Upgrade redhat/Apache Tomcat to a version that resolves this vulnerability.

    Fixed in 10.1.19
  3. Upgrade

    Upgrade redhat/Apache Tomcat to a version that resolves this vulnerability.

    Fixed in 9.0.86
  4. Upgrade

    Upgrade redhat/Apache Tomcat to a version that resolves this vulnerability.

    Fixed in 8.5.99
  5. Upgrade

    Upgrade maven/org.apache.tomcat.embed:tomcat-embed-websocket to a version that resolves this vulnerability.

    Fixed in 8.5.99
  6. Upgrade

    Upgrade maven/org.apache.tomcat.embed:tomcat-embed-websocket to a version that resolves this vulnerability.

    Fixed in 9.0.86
  7. Upgrade

    Upgrade maven/org.apache.tomcat.embed:tomcat-embed-websocket to a version that resolves this vulnerability.

    Fixed in 10.1.19
  8. Upgrade

    Upgrade maven/org.apache.tomcat.embed:tomcat-embed-websocket to a version that resolves this vulnerability.

    Fixed in 11.0.0-M17
  9. Upgrade

    Upgrade maven/org.apache.tomcat:tomcat-websocket to a version that resolves this vulnerability.

    Fixed in 8.5.99
  10. Upgrade

    Upgrade maven/org.apache.tomcat:tomcat-websocket to a version that resolves this vulnerability.

    Fixed in 9.0.86
  11. Upgrade

    Upgrade maven/org.apache.tomcat:tomcat-websocket to a version that resolves this vulnerability.

    Fixed in 10.1.19
  12. Upgrade

    Upgrade maven/org.apache.tomcat:tomcat-websocket to a version that resolves this vulnerability.

    Fixed in 11.0.0-M17
  13. Upgrade

    Upgrade Apache Tomcat to a version that resolves this vulnerability.

    Fixed in 11.0.0-M17
  14. Upgrade

    Upgrade Apache Tomcat to a version that resolves this vulnerability.

    Fixed in 10.1.19
  15. Upgrade

    Upgrade Apache Tomcat to a version that resolves this vulnerability.

    Fixed in 9.0.86
  16. Upgrade

    Upgrade Apache Tomcat to a version that resolves this vulnerability.

    Fixed in 8.5.99

Event History

Mar 13, 2024
CVE Published
via MITRE·03:48 PM
Data Sourced
via MITRE·03:48 PM
DescriptionWeakness
Data Sourced
via NVD·04:15 PM
DescriptionSeverityWeakness
Data Sourced
via NVD·04:15 PM
Affected Software
Advisory Published
via GitHub·06:31 PM
Jul 7, 2026
Data Sourced
via IBM·12:00 AM
DescriptionAffected Software

Parent advisories

This vulnerability appears in the following advisories.

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Frequently Asked Questions

1

What is the severity of CVE-2024-23672?

CVE-2024-23672 is classified as a denial of service vulnerability affecting Apache Tomcat.

2

How do I fix CVE-2024-23672?

To fix CVE-2024-23672, upgrade Apache Tomcat to versions 8.5.99, 9.0.86, 10.1.19, or 11.0.0-M17.

3

Which Apache Tomcat versions are impacted by CVE-2024-23672?

CVE-2024-23672 affects Apache Tomcat versions from 11.0.0-M1 through 11.0.0-M16, 10.1.0-M1 through 10.1.18, 9.0.0-M1 through 9.0.85, and 8.5.0 through 8.5.98.

4

What type of vulnerability is CVE-2024-23672?

CVE-2024-23672 is a denial of service vulnerability due to incomplete cleanup of WebSocket connections.

5

What are the consequences of CVE-2024-23672?

The consequences of CVE-2024-23672 include increased resource consumption, potentially affecting the availability of the affected Apache Tomcat service.

Company

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