Bug 1851420 (CVE-2020-11996)

Summary: CVE-2020-11996 tomcat: specially crafted sequence of HTTP/2 requests can lead to DoS
Product: [Other] Security Response Reporter: Guilherme de Almeida Suckevicz <gsuckevi>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED ERRATA QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: aakhtar, aileenc, akoufoud, alazarot, alee, almorale, anstephe, asoldano, atangrin, avibelli, bbaranow, bgeorges, bmaxwell, brian.stansberry, cdewolf, chazlett, cmoulliard, coolsvap, csutherl, darran.lofthouse, dbecker, dhanak, dkreling, dosoudil, drieden, ecerquei, eglynn, etirelli, fjuma, ggaughan, gmalinko, gzaronik, huwang, ibek, ikanello, istudens, ivan.afonichev, ivassile, iweiss, janstey, java-sig-commits, jawilson, jbalunas, jclere, jjoyce, jochrist, jolee, jpallich, jperkins, jrokos, jschatte, jschluet, jstastny, jwon, krathod, krzysztof.daniel, kverlaen, kwills, lgao, lhh, lpeer, lsvaty, lthon, mbabacek, mburns, mgarciac, mkolesni, mnovotny, mosmerov, msochure, msvehla, mszynkie, myarboro, nwallace, pdelbell, pesilva, pgallagh, pgrist, pjindal, plodge, pmackay, porcelli, psotirop, rguimara, rhcs-maint, rrajasek, rruss, rstancel, rstepani, rsvoboda, rsynek, sclewis, scohen, sdaley, slinaber, smaestri, szappis, tom.jenkinson, weli, yaoli, yozone
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: tomcat 10.0.0-M6, tomcat 9.0.36, tomcat 8.5.56 Doc Type: If docs needed, set a value
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2020-11-23 17:33:53 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On: 1866871    
Bug Blocks: 1851421    

Description Guilherme de Almeida Suckevicz 2020-06-26 13:31:24 UTC
A specially crafted sequence of HTTP/2 requests could trigger high CPU usage for several seconds. If a sufficient number of such requests were made on concurrent HTTP/2 connections, the server could become unresponsive.

Reference:
https://tomcat.apache.org/security-8.html

Comment 8 Jonathan Christison 2020-06-29 15:20:20 UTC
This vulnerability is out of security support scope for the following products:
 * Red Hat Jboss Fuse 6

Please refer to https://access.redhat.com/support/policy/updates/jboss_notes for more details.

Comment 15 Marco Benatto 2020-08-06 16:29:28 UTC
Statement:

Red Hat OpenStack Platform's OpenDaylight will not be updated for this flaw because it was deprecated as of RHOSP14 and is only receiving security fixes for Important and Critical flaws.
Apache Tomcat versions as shipped with Red Hat Enterprise Linux 6 and 7 are not affected by this flaw as it doesn't support HTTP/2 protocol.

Comment 20 errata-xmlrpc 2020-11-23 12:05:42 UTC
This issue has been addressed in the following products:

  Red Hat JBoss Web Server

Via RHSA-2020:5173 https://access.redhat.com/errata/RHSA-2020:5173

Comment 21 errata-xmlrpc 2020-11-23 12:11:29 UTC
This issue has been addressed in the following products:

  Red Hat JBoss Web Server 5.4 on RHEL 6
  Red Hat JBoss Web Server 5.4 on RHEL 7
  Red Hat JBoss Web Server 5.4 on RHEL 8

Via RHSA-2020:5170 https://access.redhat.com/errata/RHSA-2020:5170

Comment 22 yaoli 2020-11-23 12:45:38 UTC
Hello Team

May I know when time we will use the patch in OCP images?

https://catalog.redhat.com/software/containers/jboss-webserver-5/webserver53-openjdk8-tomcat9-openshift-rhel7

Thanks

Comment 23 Product Security DevOps Team 2020-11-23 17:33:53 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-2020-11996

Comment 24 errata-xmlrpc 2021-01-07 11:49:22 UTC
This issue has been addressed in the following products:

  Red Hat Openshift Application Runtimes

Via RHSA-2020:5388 https://access.redhat.com/errata/RHSA-2020:5388

Comment 26 errata-xmlrpc 2021-02-02 10:25:48 UTC
This issue has been addressed in the following products:

  Red Hat support for Spring Boot 2.3.6

Via RHSA-2021:0292 https://access.redhat.com/errata/RHSA-2021:0292

Comment 27 errata-xmlrpc 2021-08-11 18:23:14 UTC
This issue has been addressed in the following products:

  Red Hat Fuse 7.9

Via RHSA-2021:3140 https://access.redhat.com/errata/RHSA-2021:3140