CVE-2024-34750

Apache Tomcat: HTTP/2 excess header handling DoS

Published Jul 3, 2024 CVSS 3.1 · 7.5 High EPSS 4.6% KEV · Not listed
Description
Improper Handling of Exceptional Conditions, Uncontrolled Resource Consumption vulnerability in Apache Tomcat. When processing an HTTP/2 stream, Tomcat did not handle some cases of excessive HTTP headers correctly. This led to a miscounting of active HTTP/2 streams which in turn led to the use of an incorrect infinite timeout which allowed connections to remain open which should have been closed.

This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.0-M20, from 10.1.0-M1 through 10.1.24, from 9.0.0-M1 through 9.0.89.

The following versions were EOL at the time the CVE was created but are
known to be affected: 8.5.0 though 8.5.100. Other EOL versions may also be affected.


Users are recommended to upgrade to version 11.0.0-M21, 10.1.25 or 9.0.90, which fixes the issue.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Debian DLA Debian DLA DLA-4244-1 tomcat9 security update
Debian DSA Debian DSA DSA-5845-1 tomcat10 security update
Github GHSA Github GHSA GHSA-wm9w-rjj3-j356 Apache Tomcat - Denial of Service
Ubuntu USN Ubuntu USN USN-7562-1 Tomcat vulnerabilities
History
Type Values Removed Values Added
Description Improper Handling of Exceptional Conditions, Uncontrolled Resource Consumption vulnerability in Apache Tomcat. When processing an HTTP/2 stream, Tomcat did not handle some cases of excessive HTTP headers correctly. This led to a miscounting of active HTTP/2 streams which in turn led to the use of an incorrect infinite timeout which allowed connections to remain open which should have been closed. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.0-M20, from 10.1.0-M1 through 10.1.24, from 9.0.0-M1 through 9.0.89. The following versions were EOL at the time the CVE was created but are known to be affected: 8.5.0 though 8.5.100. Users are recommended to upgrade to version 11.0.0-M21, 10.1.25 or 9.0.90, which fixes the issue. Improper Handling of Exceptional Conditions, Uncontrolled Resource Consumption vulnerability in Apache Tomcat. When processing an HTTP/2 stream, Tomcat did not handle some cases of excessive HTTP headers correctly. This led to a miscounting of active HTTP/2 streams which in turn led to the use of an incorrect infinite timeout which allowed connections to remain open which should have been closed. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.0-M20, from 10.1.0-M1 through 10.1.24, from 9.0.0-M1 through 9.0.89. The following versions were EOL at the time the CVE was created but are known to be affected: 8.5.0 though 8.5.100. Other EOL versions may also be affected. Users are recommended to upgrade to version 11.0.0-M21, 10.1.25 or 9.0.90, which fixes the issue.
Type Values Removed Values Added
Description Improper Handling of Exceptional Conditions, Uncontrolled Resource Consumption vulnerability in Apache Tomcat. When processing an HTTP/2 stream, Tomcat did not handle some cases of excessive HTTP headers correctly. This led to a miscounting of active HTTP/2 streams which in turn led to the use of an incorrect infinite timeout which allowed connections to remain open which should have been closed. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.0-M20, from 10.1.0-M1 through 10.1.24, from 9.0.0-M1 through 9.0.89. Older, EOL versions may also be affected. Users are recommended to upgrade to version 11.0.0-M21, 10.1.25 or 9.0.90, which fixes the issue. Improper Handling of Exceptional Conditions, Uncontrolled Resource Consumption vulnerability in Apache Tomcat. When processing an HTTP/2 stream, Tomcat did not handle some cases of excessive HTTP headers correctly. This led to a miscounting of active HTTP/2 streams which in turn led to the use of an incorrect infinite timeout which allowed connections to remain open which should have been closed. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.0-M20, from 10.1.0-M1 through 10.1.24, from 9.0.0-M1 through 9.0.89. The following versions were EOL at the time the CVE was created but are known to be affected: 8.5.0 though 8.5.100. Users are recommended to upgrade to version 11.0.0-M21, 10.1.25 or 9.0.90, which fixes the issue.
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description Improper Handling of Exceptional Conditions, Uncontrolled Resource Consumption vulnerability in Apache Tomcat. When processing an HTTP/2 stream, Tomcat did not handle some cases of excessive HTTP headers correctly. This led to a miscounting of active HTTP/2 streams which in turn led to the use of an incorrect infinite timeout which allowed connections to remain open which should have been closed. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.0-M20, from 10.1.0-M1 through 10.1.24, from 9.0.0-M1 through 9.0.89. Users are recommended to upgrade to version 11.0.0-M21, 10.1.25 or 9.0.90, which fixes the issue. Improper Handling of Exceptional Conditions, Uncontrolled Resource Consumption vulnerability in Apache Tomcat. When processing an HTTP/2 stream, Tomcat did not handle some cases of excessive HTTP headers correctly. This led to a miscounting of active HTTP/2 streams which in turn led to the use of an incorrect infinite timeout which allowed connections to remain open which should have been closed. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.0-M20, from 10.1.0-M1 through 10.1.24, from 9.0.0-M1 through 9.0.89. Older, EOL versions may also be affected. Users are recommended to upgrade to version 11.0.0-M21, 10.1.25 or 9.0.90, which fixes the issue.
Type Values Removed Values Added
First Time appeared Apache
Apache tomcat
Netapp
Netapp ontap Tools
CPEs cpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:*
cpe:2.3:a:apache:tomcat:11.0.0:milestone10:*:*:*:*:*:*
cpe:2.3:a:apache:tomcat:11.0.0:milestone11:*:*:*:*:*:*
cpe:2.3:a:apache:tomcat:11.0.0:milestone12:*:*:*:*:*:*
cpe:2.3:a:apache:tomcat:11.0.0:milestone13:*:*:*:*:*:*
cpe:2.3:a:apache:tomcat:11.0.0:milestone14:*:*:*:*:*:*
cpe:2.3:a:apache:tomcat:11.0.0:milestone15:*:*:*:*:*:*
cpe:2.3:a:apache:tomcat:11.0.0:milestone16:*:*:*:*:*:*
cpe:2.3:a:apache:tomcat:11.0.0:milestone17:*:*:*:*:*:*
cpe:2.3:a:apache:tomcat:11.0.0:milestone18:*:*:*:*:*:*
cpe:2.3:a:apache:tomcat:11.0.0:milestone19:*:*:*:*:*:*
cpe:2.3:a:apache:tomcat:11.0.0:milestone1:*:*:*:*:*:*
cpe:2.3:a:apache:tomcat:11.0.0:milestone20:*:*:*:*:*:*
cpe:2.3:a:apache:tomcat:11.0.0:milestone2:*:*:*:*:*:*
cpe:2.3:a:apache:tomcat:11.0.0:milestone3:*:*:*:*:*:*
cpe:2.3:a:apache:tomcat:11.0.0:milestone4:*:*:*:*:*:*
cpe:2.3:a:apache:tomcat:11.0.0:milestone5:*:*:*:*:*:*
cpe:2.3:a:apache:tomcat:11.0.0:milestone6:*:*:*:*:*:*
cpe:2.3:a:apache:tomcat:11.0.0:milestone7:*:*:*:*:*:*
cpe:2.3:a:apache:tomcat:11.0.0:milestone8:*:*:*:*:*:*
cpe:2.3:a:apache:tomcat:11.0.0:milestone9:*:*:*:*:*:*
cpe:2.3:a:netapp:ontap_tools:9:*:*:*:*:vmware_vsphere:*:*
Vendors & Products Apache
Apache tomcat
Netapp
Netapp ontap Tools
Type Values Removed Values Added
First Time appeared Redhat enterprise Linux
Redhat rhel Eus
CPEs cpe:/a:redhat:enterprise_linux:8
cpe:/a:redhat:enterprise_linux:9
cpe:/a:redhat:rhel_eus:8.8
cpe:/a:redhat:rhel_eus:9.2
Vendors & Products Redhat enterprise Linux
Redhat rhel Eus
Type Values Removed Values Added
First Time appeared Redhat
Redhat jboss Enterprise Web Server
CPEs cpe:/a:redhat:jboss_enterprise_web_server:5.8
cpe:/a:redhat:jboss_enterprise_web_server:5.8::el7
cpe:/a:redhat:jboss_enterprise_web_server:5.8::el8
cpe:/a:redhat:jboss_enterprise_web_server:5.8::el9
cpe:/a:redhat:jboss_enterprise_web_server:6.0
cpe:/a:redhat:jboss_enterprise_web_server:6.0::el8
cpe:/a:redhat:jboss_enterprise_web_server:6.0::el9
Vendors & Products Redhat
Redhat jboss Enterprise Web Server
Weaknesses

Sources

Status
PUBLISHED
Assigner
apache
Published
Updated
Nov 3, 2025, 7:29 PM
Reserved
May 8, 2024, 7:23 AM
Status
Modified
Published
Jul 3, 2024, 8:15 PM
Modified
Jun 17, 2026, 7:34 AM
Severity
Important
Public date
Jul 3, 2024, 12:00 AM