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CVE-2021-42340GHSA-WPH7-X527-W3H5BIT-TOMCAT-2021-42340

DoS via memory leak with WebSocket connections

Published
Last modified
published
Not listed in CISA KEV
Fix
Fixed in 10.1.0-M6, 10.0.12, 9.0.54, 8.5.72
None on Exploit-DB, Metasploit or GitHub

Summary

The fix for bug 63362 present in Apache Tomcat 10.1.0-M1 to 10.1.0-M5, 10.0.0-M1 to 10.0.11, 9.0.40 to 9.0.53 and 8.5.60 to 8.5.71 introduced a memory leak. The object introduced to collect metrics for HTTP upgrade connections was not released for WebSocket connections once the connection was closed. This created a memory leak that, over time, could lead to a denial of service via an OutOfMemoryError.

Timeline

  1. CVE published
  2. Record last updated
  3. EPSS reached 10%

    FIRST estimates at least a 10% chance of exploitation in the next 30 days

Affected versions

  • Apache Software Foundation Apache Tomcat

    Apache Tomcat 10 10.0.0-M10 to 10.0.11, Apache Tomcat 10 10.1.0-M1 to 10.1.0-M5, Apache Tomcat 9 9.0.40 to 9.0.53, Apache Tomcat 8 8.5.60 to 8.5.71

  • org.apache.tomcat:tomcatMaven

    From 10.1.0-M1 · fixed in 10.1.0-M6

  • org.apache.tomcat:tomcatMaven

    From 10.0.0-M1 · fixed in 10.0.12

  • org.apache.tomcat:tomcatMaven

    From 9.0.40 · fixed in 9.0.54

  • org.apache.tomcat:tomcatMaven

    From 8.5.60 · fixed in 8.5.72

References 9

lists.apache.org

debian.org

oracle.com

security.netapp.com

kc.mcafee.com

security.gentoo.org