Apache Tomcat HTTP/2 Header Size Miscount Resource Exhaustion (v11.*-M20)
CVE-2024-34750 Published on July 3, 2024
Apache Tomcat: HTTP/2 excess header handling DoS
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.
Vulnerability Analysis
CVE-2024-34750 is exploitable with network access, and does not require authorization privileges or user interaction. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity, and a high impact on availability.
Weakness Types
Improper Handling of Exceptional Conditions
The software does not handle or incorrectly handles an exceptional condition.
What is a Resource Exhaustion Vulnerability?
The software does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources.
CVE-2024-34750 has been classified to as a Resource Exhaustion vulnerability or weakness.
Products Associated with CVE-2024-34750
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Affected Versions
Apache Software Foundation Apache Tomcat:- Version 11.0.0-M1, <= 11.0.0-M20 is affected.
- Version 10.1.0-M1, <= 10.1.24 is affected.
- Version 9.0.0-M1, <= 9.0.89 is affected.
- Version 8.5.0, <= 8.5.100 is affected.
- Version 10.0.0-M1, <= 10.0.27 is unknown.
- Version 9.0.0-m1, <= 9.0.89 is affected.
- Version 10.1.0-m1, <= 10.1.24 is affected.
- Version 11.0.0-m1, <= 11.0.0-m20 is affected.
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.