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
Created tomcat tracking bugs for this issue: Affects: fedora-all [bug 1904222]
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.
External References: http://tomcat.apache.org/security-8.html#Fixed_in_Apache_Tomcat_8.5.60 http://tomcat.apache.org/security-9.html#Fixed_in_Apache_Tomcat_9.0.40 http://tomcat.apache.org/security-10.html#Fixed_in_Apache_Tomcat_10.0.0-M10
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.
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
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
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
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
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