RHSA-2020:4004 — Security Advisory
Red Hat Security Advisory: tomcat security and bug fix update
Severity
ImportantRed Hat Product Security
Products
Official CSAF product identity
Published · September 30, 2020
Updated · August 5, 2026
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.