Bug 1904221 (CVE-2020-17527) - CVE-2020-17527 tomcat: HTTP/2 request header mix-up
Summary: CVE-2020-17527 tomcat: HTTP/2 request header mix-up
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2020-17527
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: 1904222 1906969 1910708
Blocks: 1904223
TreeView+ depends on / blocked
 
Reported: 2020-12-03 20:38 UTC by Guilherme de Almeida Suckevicz
Modified: 2021-10-04 09:11 UTC (History)
83 users (show)

See Also:
Fixed In Version: tomcat 10.0.0-M10, tomcat 9.0.40, tomcat 8.5.60
Doc Type: If docs needed, set a value
Doc Text:
Clone Of:
Environment:
Last Closed: 2021-02-11 16:09:56 UTC


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 13:50:34 UTC
Red Hat Product Errata RHSA-2021:0495 0 None None None 2021-02-11 13:51:56 UTC

Description Guilherme de Almeida Suckevicz 2020-12-03 20:38:31 UTC
While investigating Bug 64830 it was discovered that Apache Tomcat could re-use an HTTP request header value from the previous stream received on an HTTP/2 connection for the request associated with the subsequent stream. While this would most likely lead to an error and the closure of the HTTP/2 connection, it is possible that information could leak between requests.

Reference:
https://lists.apache.org/thread.html/rce5ac9a40173651d540babce59f6f3825f12c6d4e886ba00823b11e5@%3Cannounce.apache.org%3E

Comment 1 Guilherme de Almeida Suckevicz 2020-12-03 20:39:02 UTC
Created tomcat tracking bugs for this issue:

Affects: fedora-all [bug 1904222]

Comment 4 Ted Jongseok Won 2020-12-04 20:22:42 UTC
This vulnerability is out of security support scope for the following products:
 * Red Hat Enterprise Application Platform 6
 * Red Hat Data Grid 6
 * Red Hat JBoss Data Virtualization 6
 * Red Hat JBoss Fuse 6

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

Comment 14 Todd Cullum 2020-12-18 21:41:54 UTC
Statement:

Red Hat Enterprise Linux 8's Identity Management and Certificate System are using a vulnerable version of Tomcat that is bundled into the pki-servlet-engine component. However, HTTP/2 is not enabled in such a configuration, and it is not possible to trigger the flaw in a supported setup. A future update may fix the code.

Red Hat Enterprise Linux 7's tomcat package, Identity Management, and Certificate System are all not affected by this flaw because HTTP/2 is not supported in the shipped version of tomcat in those packages.

tomcat5 and tomcat6 in Red Hat Enterprise Linux 5 and 6 (respectively) are not affected by this flaw because HTTP/2 is not supported in the shipped versions of those packages.

Comment 16 errata-xmlrpc 2021-02-11 13:50:29 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 17 errata-xmlrpc 2021-02-11 13:51:52 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 18 Product Security DevOps Team 2021-02-11 16:09:56 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-2020-17527


Note You need to log in before you can comment on or make changes to this bug.