GHSA-qcxh-w3j9-58qr

Apache Tomcat Denial of Service vulnerability

At a glance

Published
Updated
CVE
CVE-2019-0199
CVSS_V3
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Description

The HTTP/2 implementation in Apache Tomcat 9.0.0.M1 to 9.0.14 and 8.5.0 to 8.5.37 accepted streams with excessive numbers of SETTINGS frames and also permitted clients to keep streams open without reading/writing request/response data. By keeping streams open for requests that utilised the Servlet API's blocking I/O, clients were able to cause server-side threads to block eventually leading to thread exhaustion and a DoS.

Affected packages

PackageVersions
Maven · org.apache.tomcat.embed:tomcat-embed-coreintroduced 9.0.0, fixed 9.0.16
Maven · org.apache.tomcat.embed:tomcat-embed-coreintroduced 8.0.0, fixed 8.5.38
Maven · org.apache.tomcat:tomcat-coyoteintroduced 9.0.0, fixed 9.0.16
Maven · org.apache.tomcat:tomcat-coyoteintroduced 8.0.0, fixed 8.5.38

References

Sources

SourceLicence
OSV.devCC-BY 4.0 — GitHub Advisory Database