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=====================================================================
                   Red Hat Security Advisory

Synopsis:          Important: Red Hat JBoss Web Server 2 security update
Advisory ID:       RHSA-2017:2494-01
Product:           Red Hat JBoss Web Server
Advisory URL:      https://access.redhat.com/errata/RHSA-2017:2494
Issue date:        2017-08-21
CVE Names:         CVE-2016-6304 CVE-2016-8610 CVE-2017-5647 
                   CVE-2017-5664 
=====================================================================

1. Summary:

An update is now available for Red Hat JBoss Web Server 2.1.2.

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.

2. Description:

OpenSSL is a toolkit that implements the Secure Sockets Layer (SSL) and
Transport Layer Security (TLS) protocols, as well as a full-strength
general-purpose cryptography library.

Apache Tomcat is a servlet container for the Java Servlet and JavaServer
Pages (JSP) technologies.

This release provides an update to OpenSSL and Tomcat 6/7 for Red Hat JBoss
Web Server 2.1.2. The updates are documented in the Release Notes document
linked to in the References.

Users of Red Hat JBoss Web Server 2.1.2 should upgrade to these updated
packages, which resolve several security issues.

Security Fix(es):

* A memory leak flaw was found in the way OpenSSL handled TLS status
request extension data during session renegotiation. A remote attacker
could cause a TLS server using OpenSSL to consume an excessive amount of
memory and, possibly, exit unexpectedly after exhausting all available
memory, if it enabled OCSP stapling support. (CVE-2016-6304)

* A vulnerability was discovered in tomcat's handling of pipelined requests
when "Sendfile" was used. If sendfile processing completed quickly, it was
possible for the Processor to be added to the processor cache twice. This
could lead to invalid responses or information disclosure. (CVE-2017-5647)

* A vulnerability was discovered in the error page mechanism in Tomcat's
DefaultServlet implementation. A crafted HTTP request could cause undesired
side effects, possibly including the removal or replacement of the custom
error page. (CVE-2017-5664)

* A denial of service flaw was found in the way the TLS/SSL protocol
defined processing of ALERT packets during a connection handshake. A remote
attacker could use this flaw to make a TLS/SSL server consume an excessive
amount of CPU and fail to accept connections from other clients.
(CVE-2016-8610)

Red Hat would like to thank the OpenSSL project for reporting CVE-2016-6304
and Shi Lei (Gear Team of Qihoo 360 Inc.) for reporting CVE-2016-8610.
Upstream acknowledges Shi Lei (Gear Team of Qihoo 360 Inc.) as the original
reporter of CVE-2016-6304.

3. Solution:

Before applying the update, back up your existing Red Hat JBoss Web Server
installation (including all applications and configuration files).

The References section of this erratum contains a download link (you must
log in to download the update).

4. Bugs fixed (https://bugzilla.redhat.com/):

1377600 - CVE-2016-6304 openssl: OCSP Status Request extension unbounded memory growth
1384743 - CVE-2016-8610 SSL/TLS: Malformed plain-text ALERT packets could cause remote DoS
1441205 - CVE-2017-5647 tomcat: Incorrect handling of pipelined requests when send file was used
1459158 - CVE-2017-5664 tomcat: Security constrained bypass in error page mechanism

5. References:

https://access.redhat.com/security/cve/CVE-2016-6304
https://access.redhat.com/security/cve/CVE-2016-8610
https://access.redhat.com/security/cve/CVE-2017-5647
https://access.redhat.com/security/cve/CVE-2017-5664
https://access.redhat.com/security/updates/classification/#important
https://access.redhat.com/jbossnetwork/restricted/listSoftware.html?product=webserver&downloadType=securityPatches&version=2.1.2
https://access.redhat.com/articles/3155411

6. Contact:

The Red Hat security contact is <secalert@redhat.com>. More contact
details at https://access.redhat.com/security/team/contact/

Copyright 2017 Red Hat, Inc.
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