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CVE-2020-27782: Uncontrolled Resource Consumption

February 23, 2021 (updated February 27, 2021)

A flaw was found in the Undertow AJP connector. Malicious requests and abrupt connection closes could be triggered by an attacker using query strings with non-RFC compliant characters resulting in a denial of service. The highest threat from this vulnerability is to system availability.

References

  • bugzilla.redhat.com/show_bug.cgi?id=1901304
  • nvd.nist.gov/vuln/detail/CVE-2020-27782

Code Behaviors & Features

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Affected versions

Version 2.0.33, version 2.1.5, version 2.2.3

Fixed versions

  • 2.0.34.Final
  • 2.1.6.Final
  • 2.2.4.Final

Solution

Upgrade to versions 2.0.34.Final, 2.1.6.Final, 2.2.4.Final 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/io.undertow/undertow-core/CVE-2020-27782.yml

Spotted a mistake? Edit the file on GitLab.

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