Apache.Tomcat.HTTP2.Connection.Window.Exhaustion.DoS

description-logoDescription

This indicates an attack attempt to exploit a Denial of Service vulnerability in Apache Tomcat.
A remote, unauthenticated attacker can exploit this vulnerability by sending a large number of requests and not sending any WINDOW_UPDATE frames with a Stream ID of 0. Successful exploitation results in denial of service conditions on the target server.

affected-products-logoAffected Products

Apache Software Foundation Tomcat 8.x prior to 8.5.41
Apache Software Foundation Tomcat 9.x prior to 9.0.20

Impact logoImpact

Denial of Service: Remote attackers can crash vulnerable systems.

recomended-action-logoRecommended Actions

Apply the most recent upgrade or patch from the vendor.
https://tomcat.apache.org/security-8.html#Fixed_in_Apache_Tomcat_8.5.41

Telemetry logoTelemetry

Coverage

IPS (Regular DB)
IPS (Extended DB)

Version Updates

Date Version Detail
2023-11-07 26.672 Sig Added
2019-08-27 14.677 Default_action:pass:drop
2019-07-26 14.660