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  5. CVE-2020-11996

CVE-2020-11996: Uncontrolled Resource Consumption

June 26, 2020 (updated July 21, 2021)

A specially crafted sequence of HTTP/2 requests sent to Apache Tomcat could trigger high CPU usage for several seconds. If a sufficient number of such requests were made on concurrent HTTP/2 connections, the server could become unresponsive.

References

  • nvd.nist.gov/vuln/detail/CVE-2020-11996

Code Behaviors & Features

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Affected versions

All versions starting from 8.5.0 up to 8.5.55, all versions starting from 9.0.0 up to 9.0.36

Fixed versions

  • 8.5.56
  • 9.0.36

Solution

Upgrade to versions 8.5.56, 9.0.36 or above.

Impact 7.5 HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Learn more about CVSS

Weakness

  • CWE-400: Uncontrolled Resource Consumption

Source file

maven/org.apache.tomcat/tomcat-coyote/CVE-2020-11996.yml

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