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Apache Tomcat: Important: Denial of Service (CVE-2019-0199)

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Apache Tomcat: Important: Denial of Service (CVE-2019-0199)

Severity
5
CVSS
(AV:N/AC:L/Au:N/C:N/I:N/A:P)
Published
03/26/2019
Created
04/22/2019
Added
03/26/2019
Modified
12/30/2019

Description

The HTTP/2 implementation in Apache Tomcat 9.0.0.M1 to 9.0.14 and 8.5.0 to 8.5.37 accepted streams with excessive numbers of SETTINGS frames and also permitted clients to keep streams open without reading/writing request/response data. By keeping streams open for requests that utilised the Servlet API's blocking I/O, clients were able to cause server-side threads to block eventually leading to thread exhaustion and a DoS.

Solution(s)

  • apache-tomcat-upgrade-8_5_38
  • apache-tomcat-upgrade-9_0_16

References

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