Resource Exhaustion Affecting tomcat package, versions <9.0.21-3.27.1


0.0
high

Snyk CVSS

    Attack Complexity Low
    Availability High

    Threat Intelligence

    EPSS 73.61% (99th percentile)
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NVD
7.5 high
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SUSE
7.5 high
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Red Hat
7.5 high

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  • Snyk ID SNYK-SLES150-TOMCAT-2741799
  • published 14 Apr 2022
  • disclosed 12 Jul 2019

How to fix?

Upgrade SLES:15.0 tomcat to version 9.0.21-3.27.1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream tomcat package and not the tomcat package as distributed by SLES. See How to fix? for SLES:15.0 relevant fixed versions and status.

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.