[RHSA-2017:0457-01] Important: Red Hat JBoss Web Server security and enhancement update

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Tue Mar 7 19:41:15 UTC 2017

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                   Red Hat Security Advisory

Synopsis:          Important: Red Hat JBoss Web Server security and enhancement update
Advisory ID:       RHSA-2017:0457-01
Product:           Red Hat JBoss Web Server
Advisory URL:      https://rhn.redhat.com/errata/RHSA-2017-0457.html
Issue date:        2017-03-07
CVE Names:         CVE-2016-0762 CVE-2016-1240 CVE-2016-3092 
                   CVE-2016-5018 CVE-2016-6325 CVE-2016-6794 
                   CVE-2016-6796 CVE-2016-6797 CVE-2016-6816 
                   CVE-2016-8735 CVE-2016-8745 

1. Summary:

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

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:

Red Hat JBoss Web Server is a fully integrated and certified set of
components for hosting Java web applications. It is comprised of the Apache
HTTP Server, the Apache Tomcat Servlet container, Apache Tomcat Connector
(mod_jk), JBoss HTTP Connector (mod_cluster), Hibernate, and the Tomcat
Native library.

This release of Red Hat JBoss Web Server 3.1.0 serves as a replacement for
Red Hat JBoss Web Server 3.0.3, and includes enhancements.

Security Fix(es):

* It was reported that the Tomcat init script performed unsafe file
handling, which could result in local privilege escalation. (CVE-2016-1240)

* It was discovered that the Tomcat packages installed certain
configuration files read by the Tomcat initialization script as writeable
to the tomcat group. A member of the group or a malicious web application
deployed on Tomcat could use this flaw to escalate their privileges.

* The JmxRemoteLifecycleListener was not updated to take account of
Oracle's fix for CVE-2016-3427. JMXRemoteLifecycleListener is only included
in EWS 2.x and JWS 3.x source distributions. If you deploy a Tomcat
instance built from source, using the EWS 2.x, or JWS 3.x distributions, an
attacker could use this flaw to launch a remote code execution attack on
your deployed instance. (CVE-2016-8735)

* A denial of service vulnerability was identified in Commons FileUpload
that occurred when the length of the multipart boundary was just below the
size of the buffer (4096 bytes) used to read the uploaded file if the
boundary was the typical tens of bytes long. (CVE-2016-3092)

* It was discovered that the code that parsed the HTTP request line
permitted invalid characters. This could be exploited, in conjunction with
a proxy that also permitted the invalid characters but with a different
interpretation, to inject data into the HTTP response. By manipulating the
HTTP response the attacker could poison a web-cache, perform an XSS attack,
or obtain sensitive information from requests other then their own.

* A bug was discovered in the error handling of the send file code for the
NIO HTTP connector. This led to the current Processor object being added to
the Processor cache multiple times allowing information leakage between
requests including, and not limited to, session ID and the response body.

* The Realm implementations did not process the supplied password if the
supplied user name did not exist. This made a timing attack possible to
determine valid user names. Note that the default configuration includes
the LockOutRealm which makes exploitation of this vulnerability harder.

* It was discovered that a malicious web application could bypass a
configured SecurityManager via a Tomcat utility method that was accessible
to web applications. (CVE-2016-5018)

* It was discovered that when a SecurityManager is configured Tomcat's
system property replacement feature for configuration files could be used
by a malicious web application to bypass the SecurityManager and read
system properties that should not be visible. (CVE-2016-6794)

* It was discovered that a malicious web application could bypass a
configured SecurityManager via manipulation of the configuration parameters
for the JSP Servlet. (CVE-2016-6796)

* It was discovered that it was possible for a web application to access
any global JNDI resource whether an explicit ResourceLink had been
configured or not. (CVE-2016-6797)

The CVE-2016-6325 issue was discovered by Red Hat Product Security.


* This enhancement update adds the Red Hat JBoss Web Server 3.1.0. These
packages provide a number of enhancements over the previous version of Red
Hat JBoss Web Server.

Users of Red Hat JBoss Web Server are advised to upgrade to these updated
packages, which add this enhancement.

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/):

1349468 - CVE-2016-3092 tomcat: Usage of vulnerable FileUpload package can result in denial of service
1367447 - CVE-2016-6325 tomcat: tomcat writable config files allow privilege escalation
1376712 - CVE-2016-1240 tomcat: unsafe chown of catalina.log in tomcat init script allows privilege escalation
1390493 - CVE-2016-6797 tomcat: unrestricted access to global resources
1390515 - CVE-2016-6796 tomcat: security manager bypass via JSP Servlet config parameters
1390520 - CVE-2016-6794 tomcat: system property disclosure
1390525 - CVE-2016-5018 tomcat: security manager bypass via IntrospectHelper utility function
1390526 - CVE-2016-0762 tomcat: timing attack in Realm implementation
1397484 - CVE-2016-6816 tomcat: HTTP Request smuggling vulnerability due to permitting invalid character in HTTP requests
1397485 - CVE-2016-8735 tomcat: Remote code execution vulnerability in JmxRemoteLifecycleListener
1403824 - CVE-2016-8745 tomcat: information disclosure due to incorrect Processor sharing

5. References:


6. Contact:

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

Copyright 2017 Red Hat, Inc.
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