// For flags

CVE-2024-34750

Apache Tomcat: HTTP/2 excess header handling DoS

Severity Score

7.5
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

Attend
*SSVC
Descriptions

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.

Manejo inadecuado de condiciones excepcionales, vulnerabilidad de consumo incontrolado de recursos en Apache Tomcat. Al procesar una secuencia HTTP/2, Tomcat no manejó correctamente algunos casos de encabezados HTTP excesivos. Esto llevó a un conteo erróneo de flujos HTTP/2 activos que a su vez llevó al uso de un tiempo de espera infinito incorrecto que permitió que las conexiones permanecieran abiertas y que deberían haberse cerrado. Este problema afecta a Apache Tomcat: desde 11.0.0-M1 hasta 11.0.0-M20, desde 10.1.0-M1 hasta 10.1.24, desde 9.0.0-M1 hasta 9.0.89. Se recomienda a los usuarios actualizar a la versión 11.0.0-M21, 10.1.25 o 9.0.90, que soluciona el problema.

A vulnerability was found in Apache Tomcat. When processing an HTTP/2 stream, Tomcat did not handle some cases of excessive HTTP headers correctly. This issue led to a miscounting of active HTTP/2 streams, which in turn led to using an incorrect infinite timeout that allowed connections to remain open that should have been closed.

Red Hat JBoss Web Server 5.8.1 zip release is now available for Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, and Windows Server.

*Credits: devme4f from VNPT-VCI
CVSS Scores
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
Attack Vector
Network
Attack Complexity
Low
Authentication
None
Confidentiality
None
Integrity
None
Availability
Complete
* Common Vulnerability Scoring System
SSVC
  • Decision:Attend
Exploitation
None
Automatable
Yes
Tech. Impact
Partial
* Organization's Worst-case Scenario
Timeline
  • 2024-05-08 CVE Reserved
  • 2024-07-03 CVE Published
  • 2024-08-16 CVE Updated
  • 2025-03-31 EPSS Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-400: Uncontrolled Resource Consumption
  • CWE-755: Improper Handling of Exceptional Conditions
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Apache Software Foundation
Search vendor "Apache Software Foundation"
Apache Tomcat
Search vendor "Apache Software Foundation" for product "Apache Tomcat"
>= 11.0.0-M1 <= 11.0.0-M20
Search vendor "Apache Software Foundation" for product "Apache Tomcat" and version " >= 11.0.0-M1 <= 11.0.0-M20"
en
Affected
Apache Software Foundation
Search vendor "Apache Software Foundation"
Apache Tomcat
Search vendor "Apache Software Foundation" for product "Apache Tomcat"
>= 10.1.0-M1 <= 10.1.24
Search vendor "Apache Software Foundation" for product "Apache Tomcat" and version " >= 10.1.0-M1 <= 10.1.24"
en
Affected
Apache Software Foundation
Search vendor "Apache Software Foundation"
Apache Tomcat
Search vendor "Apache Software Foundation" for product "Apache Tomcat"
>= 9.0.0-M1 <= 9.0.89
Search vendor "Apache Software Foundation" for product "Apache Tomcat" and version " >= 9.0.0-M1 <= 9.0.89"
en
Affected