Race Condition Affecting tomcat9 package, versions <9.0.43-2~deb11u4


Severity

Recommended
0.0
low
0
10

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Threat Intelligence

EPSS
0.2% (60th percentile)

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  • Snyk IDSNYK-DEBIAN11-TOMCAT9-3035143
  • published29 Sept 2022
  • disclosed28 Sept 2022

Introduced: 28 Sep 2022

CVE-2021-43980  (opens in a new tab)
CWE-362  (opens in a new tab)

How to fix?

Upgrade Debian:11 tomcat9 to version 9.0.43-2~deb11u4 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream tomcat9 package and not the tomcat9 package as distributed by Debian. See How to fix? for Debian:11 relevant fixed versions and status.

The simplified implementation of blocking reads and writes introduced in Tomcat 10 and back-ported to Tomcat 9.0.47 onwards exposed a long standing (but extremely hard to trigger) concurrency bug in Apache Tomcat 10.1.0 to 10.1.0-M12, 10.0.0-M1 to 10.0.18, 9.0.0-M1 to 9.0.60 and 8.5.0 to 8.5.77 that could cause client connections to share an Http11Processor instance resulting in responses, or part responses, to be received by the wrong client.

CVSS Scores

version 3.1