RHSA-2020:4004 - Security Advisory

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 impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

Description

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.

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

Affected Products

• Red Hat Enterprise Linux Server 7 x86_64
• Red Hat Enterprise Linux Server - Extended Life Cycle Support 7 x86_64
• Red Hat Enterprise Linux Workstation 7 x86_64
• Red Hat Enterprise Linux Desktop 7 x86_64
• Red Hat Enterprise Linux for IBM z Systems 7 s390x
• Red Hat Enterprise Linux for Power, big endian 7 ppc64
• Red Hat Enterprise Linux for Scientific Computing 7 x86_64
• Red Hat Enterprise Linux for Power, little endian 7 ppc64le
• Red Hat Enterprise Linux Server - Extended Life Cycle Support (for IBM z Systems) 7 s390x
• Red Hat Enterprise Linux Server - Extended Life Cycle Support for IBM Power, big endian 7 ppc64
• Red Hat Enterprise Linux Server - Extended Life Cycle Support for IBM Power, little endian 7 ppc64le

Fixes

• BZ - 1523112 - tomcat systemd does not cope with - in service names.
• BZ - 1629162 - tomcat-dbcp.jar is missing from tomcat package
• BZ - 1785711 - CVE-2019-17563 tomcat: session fixation when using FORM authentication
• BZ - 1795645 - connection leak with StatementCache, SlowQueryReport or StatementDecoratorInterceptor
• BZ - 1822453 - Tomcat parses a request having an absolute URI path incorrectly and returns 404 Not Found after BZ#1455483
• BZ - 1831127 - Failed to install ipa-server
• BZ - 1857024 - CVE-2020-13935 tomcat: multiple requests with invalid payload length in a WebSocket frame could lead to DoS

CVEs

• CVE-2019-17563
• CVE-2020-13935

References

• 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