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Apache Tomcat: High: Information Disclosure (CVE-2021-43980)

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Apache Tomcat: High: Information Disclosure (CVE-2021-43980)

Severity
4
CVSS
(AV:L/AC:M/Au:N/C:P/I:P/A:P)
Published
09/29/2022
Created
09/30/2022
Added
09/29/2022
Modified
11/08/2022

Description

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.

Solution(s)

  • apache-tomcat-upgrade-10_0_20
  • apache-tomcat-upgrade-8_5_78
  • apache-tomcat-upgrade-9_0_62

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