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Alerts This Week
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Debian: DLA-3160-1 Critical: Tomcat9 Concurrency Risks and Fixes

debian lts
Calendar Grey October 26, 2022
Dist Debian Esm H88
Important patches targeting multiple weaknesses in Tomcat9 impact Debian LTS. Update recommended for better protection
Several security vulnerabilities have been discovered in the Tomcat servlet and JSP engine
Topics%20covered

Topics Covered

security advisory critical debian local attack tomcat concurrency

Summary

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 that could cause client
connections to share an Http11Processor instance resulting in responses, or
part responses, to be received by the wrong client.

CVE-2022-23181

The fix for bug CVE-2020-9484 introduced a time of check, time of use
vulnerability into Apache Tomcat that allowed a local attacker to perform
actions with the privileges of the user that the Tomcat process is using.
This issue is only exploitable when Tomcat is configured to persist
sessions using the FileStore.

CVE-2022-29885

The documentation of Apache Tomcat for the EncryptInterceptor incorrectly
stated it enabled Tomcat clustering to run over an untrusted network. This
was not correct. While the EncryptInterceptor does provide confidentiality

Read the Full Advisory


Severity
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-------------------------------------------------------------------------Package: tomcat9
Version: 9.0.31-1~deb10u7
CVE ID: CVE-2021-43980 CVE-2022-23181 CVE-2022-29885

Topics%20covered

Topics Covered

security advisory critical debian local attack tomcat concurrency

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