Bug 1887648 (CVE-2020-13943) - CVE-2020-13943 tomcat: Apache Tomcat HTTP/2 Request mix-up
Summary: CVE-2020-13943 tomcat: Apache Tomcat HTTP/2 Request mix-up
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2020-13943
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1889329
Blocks: 1887641
TreeView+ depends on / blocked
 
Reported: 2020-10-13 05:02 UTC by Ted Jongseok Won
Modified: 2023-12-15 19:45 UTC (History)
86 users (show)

Fixed In Version: tomcat 10.0.0-M8, tomcat 9.0.38, tomcat 8.5.58
Doc Type: ---
Doc Text:
A flaw was found in Apache Tomcat. If an HTTP/2 client exceeded the agreed maximum number of concurrent streams for a connection (in violation of the HTTP/2 protocol), it is possible that a subsequent request made on that connection could contain HTTP headers - including HTTP/2 pseudo headers - from a previous request rather than the intended headers. This could lead to users seeing responses for unexpected resources. The highest threat from this vulnerability is to data confidentiality.
Clone Of:
Environment:
Last Closed: 2021-02-11 16:09:50 UTC
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2021:0494 0 None None None 2021-02-11 13:50:23 UTC
Red Hat Product Errata RHSA-2021:0495 0 None None None 2021-02-11 13:51:47 UTC
Red Hat Product Errata RHSA-2021:4012 0 None None None 2021-10-28 07:52:31 UTC
Red Hat Product Errata RHSA-2021:5134 0 None None None 2021-12-14 21:32:58 UTC

Description Ted Jongseok Won 2020-10-13 05:02:15 UTC 
If an HTTP/2 client exceeded the agreed maximum number of concurrent streams for a connection (in violation of the HTTP/2 protocol), it was possible that a subsequent request made on that connection could contain HTTP headers - including HTTP/2 pseudo headers - from a previous request rather than the intended headers. This could lead to users seeing responses for unexpected resources.

Upstream commits:
Tomcat 10.0: https://github.com/apache/tomcat/commit/1bbc650cbc3f08d85a1ec6d803c47ae53a84f3bb
Tomcat 9.0: https://github.com/apache/tomcat/commit/55911430df13f8c9998fbdee1f9716994d2db59b
Tomcat 8.5: https://github.com/apache/tomcat/commit/9d7def063b47407a09a2f9202beed99f4dcb292a

Reference:
http://mail-archives.apache.org/mod_mbox/tomcat-announce/202010.mbox/%3C2b767c6e-dcb9-5816-bd69-a3bc0771fef3%40apache.org%3E
Comment 1 Ted Jongseok Won 2020-10-13 05:02:26 UTC 
External References:

http://mail-archives.apache.org/mod_mbox/tomcat-announce/202010.mbox/%3C2b767c6e-dcb9-5816-bd69-a3bc0771fef3%40apache.org%3E
http://tomcat.apache.org/security-10.html#Fixed_in_Apache_Tomcat_10.0.0-M8
http://tomcat.apache.org/security-9.html#Fixed_in_Apache_Tomcat_9.0.38
http://tomcat.apache.org/security-8.html#Fixed_in_Apache_Tomcat_8.5.58
Comment 3 Ted Jongseok Won 2020-10-13 05:44:28 UTC 
This vulnerability is out of security support scope for the following products:
 * Red Hat JBoss Enterprise Application Platform 6
 * Red Hat JBoss Data Grid 6
 * Red Hat JBoss Fuse 6
 * Red Hat JBoss Data Virtualization 6

Please refer to https://access.redhat.com/support/policy/updates/jboss_notes for more details.
Comment 11 errata-xmlrpc 2021-02-11 13:50:18 UTC 
This issue has been addressed in the following products:

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

Via RHSA-2021:0494 https://access.redhat.com/errata/RHSA-2021:0494
Comment 12 errata-xmlrpc 2021-02-11 13:51:43 UTC 
This issue has been addressed in the following products:

  Red Hat JBoss Web Server

Via RHSA-2021:0495 https://access.redhat.com/errata/RHSA-2021:0495
Comment 13 Product Security DevOps Team 2021-02-11 16:09:50 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-2020-13943
Comment 14 errata-xmlrpc 2021-10-28 07:52:27 UTC 
This issue has been addressed in the following products:

  Red Hat Support for Spring Boot 2.4.9

Via RHSA-2021:4012 https://access.redhat.com/errata/RHSA-2021:4012
Comment 15 errata-xmlrpc 2021-12-14 21:32:53 UTC 
This issue has been addressed in the following products:

  Red Hat Fuse 7.10

Via RHSA-2021:5134 https://access.redhat.com/errata/RHSA-2021:5134
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