CVE-2024-34750: tomcat DoS — Fix

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.

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CVSS v3.1 Score

7.5

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Weakness Type (CWE)

CWE-400 Uncontrolled Resource Consumption

CWE-755 CWE-755

Affected Products

Vendor	Product	Versions
apache	tomcat	9.0.0 — 9.0.90
apache	tomcat	10.1.0 — 10.1.25
apache	tomcat	All
apache	tomcat	All
apache	tomcat	All
apache	tomcat	All
apache	tomcat	All
apache	tomcat	All
apache	tomcat	All
apache	tomcat	All
apache	tomcat	All
apache	tomcat	All
apache	tomcat	All
apache	tomcat	All
apache	tomcat	All
apache	tomcat	All
apache	tomcat	All
apache	tomcat	All
apache	tomcat	All
apache	tomcat	All
apache	tomcat	All
apache	tomcat	All
netapp	ontap_tools	All

References

Advisories & Patches

https://lists.apache.org/thread/4kqf0bc9gxymjc2x7v3p7dvplnl77y8l https://lists.apache.org/thread/4kqf0bc9gxymjc2x7v3p7dvplnl77y8l

Other References

https://lists.debian.org/debian-lts-announce/2025/07/msg00009.html https://security.netapp.com/advisory/ntap-20240816-0004/

Frequently Asked Questions

What is CVE-2024-34750? +

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. It has a CVSS v3.1 base score of 7.5 (HIGH).

How severe is CVE-2024-34750? +

CVE-2024-34750 has a CVSS v3.1 score of 7.5 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.

What products are affected by CVE-2024-34750? +

CVE-2024-34750 affects products from apache, netapp, specifically: ontap_tools, tomcat. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2024-34750? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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