6.3

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

Modified
AliasesRHSA-2024:1913RHSA-2024:1916UBUNTU-CVE-2024-23672
Published 13-03-2024Last modified 29-10-2025

Vulnerability summary

CVE-2024-23672 is a medium (CVSS 6.3) Incomplete Cleanup vulnerability in apache software foundation apache tomcat. EPSS estimates a 2.31% chance of exploitation in the next 30 days, higher than 83.4% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 6.3, network access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
6.3/10
010
Medium · v3.1 (CVE.org)
EPSS score
2.31%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 17 · Related 10
DLA-3779-1DSA-5665-1DSA-5667-1MGASA-2024-0090OPENSUSE-SU-2024:13832-1OPENSUSE-SU-2024:13833-1

Timeline

  1. 13-03-2024
    PublishedVulnerability first disclosed.
  2. 29-10-2025
    Last modifiedVulnerability information updated.

Description

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.

CVSS metrics

7 scores · 7 sources · 1 version

EPSS trend

Probability

2.31%

Chance of exploitation in the next 30 days

Percentile

83%

Versus all other CVEs

30-day change

No change 0.00 pp

From 2.31% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: network-reachable, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.

Redhat22 products
  • jws5-tomcat< 0:9.0.87-3.redhat_00003.1.el7jws | < 0:9.0.87-3.redhat_00003.1.el8jws | < 0:9.0.87-3.redhat_00003.1.el9jws
  • jws5-tomcat-admin-webapps< 0:9.0.87-3.redhat_00003.1.el7jws | < 0:9.0.87-3.redhat_00003.1.el8jws | < 0:9.0.87-3.redhat_00003.1.el9jws
  • jws5-tomcat-docs-webapp< 0:9.0.87-3.redhat_00003.1.el7jws | < 0:9.0.87-3.redhat_00003.1.el8jws | < 0:9.0.87-3.redhat_00003.1.el9jws
  • jws5-tomcat-el-3.0-api< 0:9.0.87-3.redhat_00003.1.el7jws | < 0:9.0.87-3.redhat_00003.1.el8jws | < 0:9.0.87-3.redhat_00003.1.el9jws
  • jws5-tomcat-java-jdk11< 0:9.0.87-3.redhat_00003.1.el7jws
Ubuntu4 products
  • tomcat10< 10.1.16-1ubuntu0.1~esm2
  • tomcat7All versions (No fix recorded)
  • tomcat8All versions (No fix recorded) | < 8.5.39-1ubuntu1~18.04.3+esm5
  • tomcat9< 9.0.16-3ubuntu0.18.04.2+esm4 | < 9.0.31-1ubuntu0.8 | < 9.0.58-1ubuntu0.1+esm4 | < 9.0.70-2ubuntu0.1+esm2 | < 9.0.70-2ubuntu3
Debian3 products
  • tomcat10< 10.1.6-1+deb12u2 | < 10.1.20-1
  • tomcat9< 9.0.70-2
  • debian_linuxEOL10.0
Apache1 product
  • tomcat≥ 8.5.0, < 8.5.99 | ≥ 9.0.0, < 9.0.86 | ≥ 10.1.0, < 10.1.19 | 11.0.0:milestone1 | 11.0.0:milestone10 | 11.0.0:milestone11 | 11.0.0:milestone12 | 11.0.0:milestone13 | 11.0.0:milestone14 | 11.0.0:milestone15 | 11.0.0:milestone16 | 11.0.0:milestone2 | 11.0.0:milestone3 | 11.0.0:milestone4 | 11.0.0:milestone5 | 11.0.0:milestone6 | 11.0.0:milestone7 | 11.0.0:milestone8 | 11.0.0:milestone9
Apache software foundation1 product
  • apache tomcat≥ 11.0.0-M1, ≤ 11.0.0-M16 | ≥ 10.1.0-M1, ≤ 10.1.18 | ≥ 9.0.0-M1, ≤ 9.0.85 | ≥ 8.5.0, ≤ 8.5.98
Chainguard1 product
  • tomcat-8.5.87All versions (No fix recorded)
Fedoraproject1 product
Org.apache.tomcat1 product
  • tomcat-websocket≥ 11.0.0-M1, < 11.0.0-M17 | ≥ 10.1.0-M1, < 10.1.19 | ≥ 9.0.0-M1, < 9.0.86 | ≥ 8.5.0, < 8.5.99
Org.apache.tomcat.embed1 product
  • tomcat-embed-websocket≥ 11.0.0-M1, < 11.0.0-M17 | ≥ 10.1.0-M1, < 10.1.19 | ≥ 9.0.0-M1, < 9.0.86 | ≥ 8.5.0, < 8.5.99

9 vendors · 35 products

References

30 links
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