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Debian Security Advisory DSA-5265-1                   security@debian.org
https://www.debian.org/security/                          Markus Koschany
October 29, 2022                      https://www.debian.org/security/faq
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Package        : tomcat9
CVE ID         : CVE-2021-43980 CVE-2022-23181 CVE-2022-29885

Several security vulnerabilities have been discovered in the Tomcat
servlet and JSP engine.

CVE-2021-43980

    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
    and integrity protection, it does not protect against all risks associated
    with running over any untrusted network, particularly DoS risks.

For the stable distribution (bullseye), these problems have been fixed in
version 9.0.43-2~deb11u4.

We recommend that you upgrade your tomcat9 packages.

For the detailed security status of tomcat9 please refer to
its security tracker page at:
https://security-tracker.debian.org/tracker/source-package/tomcat9

Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://www.debian.org/security/

Mailing list: debian-security-announce@lists.debian.org

Debian: DSA-5265-1: tomcat9 security update

October 29, 2022
Several security vulnerabilities have been discovered in the Tomcat servlet and JSP engine

Summary

Several security vulnerabilities have been discovered in the Tomcat
servlet and JSP engine.

CVE-2021-43980

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 corr...

Read the Full Advisory

Severity
Package : tomcat9
CVE ID : CVE-2021-43980 CVE-2022-23181 CVE-2022-29885

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