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CVE-2020-13935: Loop with Unreachable Exit Condition (Infinite Loop)

July 14, 2020 (updated October 20, 2021)

The payload length in a WebSocket frame was not correctly validated in Apache Tomcat. Invalid payload lengths could trigger an infinite loop. Multiple requests with invalid payload lengths could lead to a denial of service.

References

  • nvd.nist.gov/vuln/detail/CVE-2020-13935

Code Behaviors & Features

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Affected versions

All versions starting from 7.0.27 up to 7.0.104, all versions starting from 8.5.0 up to 8.5.56, all versions starting from 9.0.0 up to 9.0.36, version 10.0.0

Fixed versions

  • 7.0.105
  • 8.5.57
  • 9.0.37
  • 10.0.2

Solution

Upgrade to versions 7.0.105, 8.5.57, 9.0.37, 10.0.2 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-835: Loop with Unreachable Exit Condition ('Infinite Loop')

Source file

maven/org.apache.tomcat.embed/tomcat-embed-websocket/CVE-2020-13935.yml

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