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CVE-2020-13934: Denial of Service

July 14, 2020 (updated July 21, 2021)

h2c does not release the HTTP/1.1 processor after the upgrade to HTTP/2. If a sufficient number of such requests were made, an OutOfMemoryException could occur leading to a denial of service.

References

  • nvd.nist.gov/vuln/detail/CVE-2020-13934

Code Behaviors & Features

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Affected versions

All versions starting from 8.5.1 up to 8.5.56, all versions starting from 9.0.0 up to 9.0.36, version 10.0.0

Fixed versions

  • 8.5.57
  • 9.0.37

Solution

Upgrade to versions 8.5.57, 9.0.37 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-119: Improper Restriction of Operations within the Bounds of a Memory Buffer

Source file

maven/org.apache.tomcat.embed/tomcat-embed-core/CVE-2020-13934.yml

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