Apache Tomcat: HTTP/2 excess header handling DoS (CVE-2024-34750)
Apache Tomcat versions from 9.0.0 through 9.0.89, 10.1.0 through 10.1.24, and 11.0.0 are affected by a denial of service vulnerability due to improper handling of excessive HTTP/2 headers. This flaw causes miscounting of active HTTP/2 streams, leading to infinite timeouts and connections remaining open when they should be closed. Users are advised to upgrade to fixed versions 9.0.90, 10.1.25, or 11.0.0 to remediate the issue.
AI Analysis
Technical Summary
CVE-2024-34750 is a vulnerability in Apache Tomcat where improper handling of exceptional conditions related to excessive HTTP/2 headers results in uncontrolled resource consumption. Specifically, Tomcat miscounts active HTTP/2 streams, causing an infinite timeout to be applied incorrectly. This allows connections to remain open indefinitely, leading to a denial of service condition. The vulnerability affects Apache Tomcat versions 9.0.0 through 9.0.89, 10.1.0 through 10.1.24, and 11.0.0. End-of-life versions 8.5.0 through 8.5.100 are also known to be affected. Fixed versions include 9.0.90, 10.1.25, and 11.0.0. Red Hat has issued an important security advisory (RHSA-2024:4976) addressing this issue with updated packages for JBoss Web Server 6.0.3, which includes Apache Tomcat fixes.
Potential Impact
The vulnerability allows an attacker to cause a denial of service by exhausting server resources through connections that remain open indefinitely due to incorrect handling of HTTP/2 streams. This can degrade or disrupt service availability but does not indicate direct code execution or data compromise based on the provided information.
Mitigation Recommendations
A patch is available and users should upgrade to Apache Tomcat versions 9.0.90, 10.1.25, or 11.0.0 or later. Red Hat users should apply the JBoss Web Server 6.0.3 update which includes the fix. No additional mitigations are indicated by the vendor advisory. Patch status is confirmed by the Red Hat security advisory RHSA-2024:4976.
Apache Tomcat: HTTP/2 excess header handling DoS (CVE-2024-34750)
Description
Apache Tomcat versions from 9.0.0 through 9.0.89, 10.1.0 through 10.1.24, and 11.0.0 are affected by a denial of service vulnerability due to improper handling of excessive HTTP/2 headers. This flaw causes miscounting of active HTTP/2 streams, leading to infinite timeouts and connections remaining open when they should be closed. Users are advised to upgrade to fixed versions 9.0.90, 10.1.25, or 11.0.0 to remediate the issue.
Affected software
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2024-34750 is a vulnerability in Apache Tomcat where improper handling of exceptional conditions related to excessive HTTP/2 headers results in uncontrolled resource consumption. Specifically, Tomcat miscounts active HTTP/2 streams, causing an infinite timeout to be applied incorrectly. This allows connections to remain open indefinitely, leading to a denial of service condition. The vulnerability affects Apache Tomcat versions 9.0.0 through 9.0.89, 10.1.0 through 10.1.24, and 11.0.0. End-of-life versions 8.5.0 through 8.5.100 are also known to be affected. Fixed versions include 9.0.90, 10.1.25, and 11.0.0. Red Hat has issued an important security advisory (RHSA-2024:4976) addressing this issue with updated packages for JBoss Web Server 6.0.3, which includes Apache Tomcat fixes.
Potential Impact
The vulnerability allows an attacker to cause a denial of service by exhausting server resources through connections that remain open indefinitely due to incorrect handling of HTTP/2 streams. This can degrade or disrupt service availability but does not indicate direct code execution or data compromise based on the provided information.
Mitigation Recommendations
A patch is available and users should upgrade to Apache Tomcat versions 9.0.90, 10.1.25, or 11.0.0 or later. Red Hat users should apply the JBoss Web Server 6.0.3 update which includes the fix. No additional mitigations are indicated by the vendor advisory. Patch status is confirmed by the Red Hat security advisory RHSA-2024:4976.
Technical Details
- Gcve Source
- db.gcve.eu
- Csaf Category
- csaf_security_advisory
- Csaf Version
- 2.0
- Publisher
- Red Hat Product Security
- Advisory Id
- RHSA-2024:4976
- Cve Count
- 2
- Additional Cves
- ["CVE-2024-38286"]
Threat ID: 6a3e805fcef61ccff97015b7
Added to database: 06/26/2026, 13:36:31 UTC
Last enriched: 09/08/2026, 15:09:45 UTC
Last updated: 09/10/2026, 19:36:48 UTC
Views: 68
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