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  5. CVE-2020-11996

CVE-2020-11996: Uncontrolled Resource Consumption in Apache Tomcat

February 9, 2022

A specially crafted sequence of HTTP/2 requests sent to Apache Tomcat 10.0.0-M1 to 10.0.0-M5, 9.0.0.M1 to 9.0.35 and 8.5.0 to 8.5.55 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

  • lists.opensuse.org/opensuse-security-announce/2020-07/msg00064.html
  • lists.opensuse.org/opensuse-security-announce/2020-07/msg00072.html
  • github.com/advisories/GHSA-53hp-jpwq-2jgq
  • nvd.nist.gov/vuln/detail/CVE-2020-11996
  • security.netapp.com/advisory/ntap-20200709-0002/
  • usn.ubuntu.com/4596-1/
  • www.debian.org/security/2020/dsa-4727
  • www.oracle.com/security-alerts/cpujan2021.html
  • www.oracle.com/security-alerts/cpuoct2020.html

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

Source file

maven/org.apache.tomcat.embed/tomcat-embed-core/CVE-2020-11996.yml

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