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CVE-2020-13943

Published: 12 October 2020

If an HTTP/2 client connecting to Apache Tomcat 10.0.0-M1 to 10.0.0-M7, 9.0.0.M1 to 9.0.37 or 8.5.0 to 8.5.57 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.

Priority

Medium

CVSS 3 base score: 4.3

Status

Package Release Status
tomcat8
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(code not present)
focal Does not exist

precise Does not exist

trusty Does not exist

upstream Needs triage

xenial Not vulnerable
(code not present)
tomcat9
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(code not present)
focal Not vulnerable
(code not present)
precise Does not exist

trusty Does not exist

upstream
Released (9.0.38-1)
xenial Does not exist