Bug 1693325 (CVE-2019-0199) - CVE-2019-0199 tomcat: Apache Tomcat HTTP/2 DoS
Summary: CVE-2019-0199 tomcat: Apache Tomcat HTTP/2 DoS
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2019-0199
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1693326 1693508
Blocks: 1692760
TreeView+ depends on / blocked
 
Reported: 2019-03-27 14:40 UTC by Laura Pardo
Modified: 2021-10-04 07:15 UTC (History)
79 users (show)

Fixed In Version: tomcat 8.5.38, tomcat 9.0.16
Doc Type: If docs needed, set a value
Doc Text:
A flaw was found in Apache Tomcat, where the HTTP/2 implementation accepted streams with excessive numbers of SETTINGS frames and also permitted clients to keep streams open, which enables them to cause server-side threads to block. This flaw eventually leads to a denial of service attack.
Clone Of:
Environment:
Last Closed: 2019-12-02 19:04:51 UTC


Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2019:3929 0 None None None 2019-12-02 16:27:15 UTC
Red Hat Product Errata RHSA-2019:3931 0 None None None 2019-12-02 16:22:34 UTC
Red Hat Product Errata RHSA-2020:2366 0 None None None 2020-06-04 13:06:44 UTC

Description Laura Pardo 2019-03-27 14:40:55 UTC
A vulnerability was found in Apache Tomcat version from 9.0.0.M1 to 9.0.14 inclusive and 8.5.0 to 8.5.37 inclusive. The HTTP/2 implementation 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.


References:
https://mail-archives.apache.org/mod_mbox/tomcat-announce/201903.mbox/browser
http://tomcat.apache.org/security-9.html
http://tomcat.apache.org/security-8.html

Comment 1 Laura Pardo 2019-03-27 14:41:19 UTC
Created tomcat tracking bugs for this issue:

Affects: fedora-all [bug 1693326]

Comment 4 Doran Moppert 2019-06-27 04:01:21 UTC
Statement:

pki-servlet-container does not use HTTP/2 in its default configuration.

Comment 5 errata-xmlrpc 2019-12-02 16:22:31 UTC
This issue has been addressed in the following products:

  Red Hat JBoss Web Server

Via RHSA-2019:3931 https://access.redhat.com/errata/RHSA-2019:3931

Comment 6 errata-xmlrpc 2019-12-02 16:27:07 UTC
This issue has been addressed in the following products:

  Red Hat JBoss Web Server 5.2 on RHEL 7
  Red Hat JBoss Web Server 5.2 on RHEL 6
  Red Hat JBoss Web Server 5.2 on RHEL 8

Via RHSA-2019:3929 https://access.redhat.com/errata/RHSA-2019:3929

Comment 7 Product Security DevOps Team 2019-12-02 19:04:51 UTC
This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):

https://access.redhat.com/security/cve/cve-2019-0199

Comment 9 errata-xmlrpc 2020-06-04 13:06:40 UTC
This issue has been addressed in the following products:

  Red Hat Runtimes Spring Boot 2.1.12

Via RHSA-2020:2366 https://access.redhat.com/errata/RHSA-2020:2366


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