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Red Hat 7: RHSA-2020-4004-01 Critical Update for Tomcat DoS Vulnerabilities

red hat
Calendar Grey September 29, 2020
Dist Redhat Esm H88
Patch for Tomcat on Red Hat Enterprise Linux 7 resolves severe security vulnerabilities encompassing DoS attacks and session fixation exploits.
An update for tomcat is now available for Red Hat Enterprise Linux 7

Solution

For details on how to apply this update, which includes the changes described in this advisory, refer to:

https://access.redhat.com/articles/11258

Summary

Apache Tomcat is a servlet container for the Java Servlet and JavaServer Pages (JSP) technologies.
Security Fix(es):
* tomcat: multiple requests with invalid payload length in a WebSocket frame could lead to DoS (CVE-2020-13935)
* tomcat: session fixation when using FORM authentication (CVE-2019-17563)
For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
Additional Changes:
For detailed information on changes in this release, see the Red Hat Enterprise Linux 7.9 Release Notes linked from the References section.

Topics%20covered

Topics Covered

security advisory Red Hat bug fix DoS tomcat session fixation Important

References

https://access.redhat.com/security/cve/CVE-2019-17563 https://access.redhat.com/security/cve/CVE-2020-13935 https://access.redhat.com/security/updates/classification/#important https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/7/html/7.9_release_notes/index

Package List

Red Hat Enterprise Linux Client (v. 7):
Source: tomcat-7.0.76-15.el7.src.rpm
noarch: tomcat-servlet-3.0-api-7.0.76-15.el7.noarch.rpm
Red Hat Enterprise Linux Client Optional (v. 7):
noarch: tomcat-7.0.76-15.el7.noarch.rpm tomcat-admin-webapps-7.0.76-15.el7.noarch.rpm tomcat-docs-webapp-7.0.76-15.el7.noarch.rpm tomcat-el-2.2-api-7.0.76-15.el7.noarch.rpm tomcat-javadoc-7.0.76-15.el7.noarch.rpm tomcat-jsp-2.2-api-7.0.76-15.el7.noarch.rpm tomcat-jsvc-7.0.76-15.el7.noarch.rpm tomcat-lib-7.0.76-15.el7.noarch.rpm tomcat-webapps-7.0.76-15.el7.noarch.rpm
Red Hat Enterprise Linux ComputeNode (v. 7):
Source: tomcat-7.0.76-15.el7.src.rpm
noarch: tomcat-servlet-3.0-api-7.0.76-15.el7.noarch.rpm
Red Hat Enterprise Linux ComputeNode Optional (v. 7):
noarch: tomcat-7.0.76-15.el7.noarch.rpm tomcat-admin-webapps-7.0.76-15.el7.noarch.rpm tomcat-docs-webapp-7.0.76-15.el7.noarch.rpm tomcat-el-2.2-api-7.0.76-15.el7.noarch.rpm tomcat-javadoc-7.0.76-15.el7.noarch.rpm tomcat-jsp-2.2-api-7.0.76-15.el7.noarch.rpm tomcat-jsvc-7.0.76-15.el7.noarch.rpm tomcat-lib-7.0.76-15.el7.noarch.rpm tomcat-webapps-7.0.76-15.el7.noarch.rpm
Red Hat Enterprise Linux Server (v. 7):
Source: tomcat-7.0.76-15.el7.src.rpm
noarch: tomcat-7.0.76-15.el7.noarch.rpm tomcat-admin-webapps-7.0.76-15.el7.noarch.rpm

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2020:4004-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2020:4004
Issue date: 2020-09-29

Topic

An update for tomcat is now available for Red Hat Enterprise Linux 7.Red Hat Product Security has rated this update as having a security impactof Important. A Common Vulnerability Scoring System (CVSS) base score,which gives a detailed severity rating, is available for each vulnerabilityfrom the CVE link(s) in the References section.

Topics%20covered

Topics Covered

security advisory Red Hat bug fix DoS tomcat session fixation Important

Relevant Releases Architectures

Red Hat Enterprise Linux Client (v. 7) - noarch

Red Hat Enterprise Linux Client Optional (v. 7) - noarch

Red Hat Enterprise Linux ComputeNode (v. 7) - noarch

Red Hat Enterprise Linux ComputeNode Optional (v. 7) - noarch

Red Hat Enterprise Linux Server (v. 7) - noarch

Red Hat Enterprise Linux Server Optional (v. 7) - noarch

Red Hat Enterprise Linux Workstation (v. 7) - noarch

Red Hat Enterprise Linux Workstation Optional (v. 7) - noarch

Bugs Fixed

1523112 - tomcat systemd does not cope with - in service names.

1629162 - tomcat-dbcp.jar is missing from tomcat package

1785711 - CVE-2019-17563 tomcat: session fixation when using FORM authentication

1795645 - connection leak with StatementCache, SlowQueryReport or StatementDecoratorInterceptor

1822453 - Tomcat parses a request having an absolute URI path incorrectly and returns 404 Not Found after BZ#1455483

1831127 - Failed to install ipa-server

1857024 - CVE-2020-13935 tomcat: multiple requests with invalid payload length in a WebSocket frame could lead to DoS

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