CVE-2020-13943 Affecting tomcat package, versions [,8.5.58)[9.0.0, 9.0.38)[10.0.08, 10.0.0-M8)


Severity

Recommended
0.0
medium
0
10

CVSS assessment made by Snyk's Security Team. Learn more

Threat Intelligence

EPSS
0.12% (47th percentile)

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  • Snyk IDSNYK-UNMANAGED-TOMCAT-2382287
  • published26 Jan 2022
  • disclosed12 Oct 2020
  • creditUnknown

Introduced: 12 Oct 2020

CVE-2020-13943  (opens in a new tab)

How to fix?

Upgrade tomcat to version 8.5.58, 9.0.38, 10.0.0-M8 or higher.

Overview

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.

CVSS Scores

version 3.1