CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
AI Score
Confidence
High
Hello IBB team, i would like to submit a report about Apache Tomcat DoS vulnerability that i have reported to the Tomcat team, which was assigned to CVE-2024-34750 and disclosed yesterday.
Details:
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.
Here is the email thread that i contacted the security team:
āāāāāāāāāā
Since HTTP/2 connections are left open indefinitely, depending on configuration the DoS is caused either by the server running out of memory or by the open connections reaching maxConnections.