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Red Hat Security Advisory 2014-0833-01

Red Hat Security Advisory 2014-0833-01
Posted Jul 3, 2014
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2014-0833-01 - 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, JBoss HTTP Connector, Hibernate, and the Tomcat Native library. It was discovered that Apache Tomcat did not limit the length of chunk sizes when using chunked transfer encoding. A remote attacker could use this flaw to perform a denial of service attack against Tomcat by streaming an unlimited quantity of data, leading to excessive consumption of server resources.

tags | advisory, java, remote, web, denial of service
systems | linux, redhat
advisories | CVE-2014-0075, CVE-2014-0096, CVE-2014-0099
SHA-256 | 5efb44a685c7cac8c591f34bfa213f43b8ad5b6530ccaa57c0d0f75f29f7b5c6

Red Hat Security Advisory 2014-0833-01

Change Mirror Download
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=====================================================================
Red Hat Security Advisory

Synopsis: Moderate: Red Hat JBoss Web Server 2.0.1 tomcat6 security update
Advisory ID: RHSA-2014:0833-01
Product: Red Hat JBoss Web Server
Advisory URL: https://rhn.redhat.com/errata/RHSA-2014-0833.html
Issue date: 2014-07-03
CVE Names: CVE-2014-0075 CVE-2014-0096 CVE-2014-0099
=====================================================================

1. Summary:

An update for the Apache Tomcat 6 component for Red Hat JBoss Web Server
2.0.1 that fixes three security issues is now available from the Red Hat
Customer Portal.

The Red Hat Security Response Team has rated this update as having Moderate
security impact. Common Vulnerability Scoring System (CVSS) base scores,
which give detailed severity ratings, are available for each vulnerability
from the CVE links 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.

It was discovered that Apache Tomcat did not limit the length of chunk
sizes when using chunked transfer encoding. A remote attacker could use
this flaw to perform a denial of service attack against Tomcat by streaming
an unlimited quantity of data, leading to excessive consumption of server
resources. (CVE-2014-0075)

It was found that Apache Tomcat did not check for overflowing values when
parsing request content length headers. A remote attacker could use this
flaw to perform an HTTP request smuggling attack on a Tomcat server located
behind a reverse proxy that processed the content length header correctly.
(CVE-2014-0099)

It was found that the org.apache.catalina.servlets.DefaultServlet
implementation in Apache Tomcat allowed the definition of XML External
Entities (XXEs) in provided XSLTs. A malicious application could use this
to circumvent intended security restrictions to disclose sensitive
information. (CVE-2014-0096)

The CVE-2014-0075 issue was discovered by David Jorm of Red Hat Product
Security.

All users of Red Hat JBoss Web Server 2.0.1 as provided from the Red Hat
Customer Portal are advised to apply this update. The Red Hat JBoss Web
Server process must be restarted for the update to take effect.

3. Solution:

The References section of this erratum contains a download link (you must
log in to download the update). Before applying the update, back up your
existing Red Hat JBoss Web Server installation (including all applications
and configuration files).

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

1072776 - CVE-2014-0075 Tomcat/JBossWeb: Limited DoS in chunked transfer encoding input filter
1088342 - CVE-2014-0096 Tomcat/JBossWeb: XXE vulnerability via user supplied XSLTs
1102030 - CVE-2014-0099 Tomcat/JBossWeb: Request smuggling via malicious content length header

5. References:

https://www.redhat.com/security/data/cve/CVE-2014-0075.html
https://www.redhat.com/security/data/cve/CVE-2014-0096.html
https://www.redhat.com/security/data/cve/CVE-2014-0099.html
https://access.redhat.com/security/updates/classification/#moderate
https://access.redhat.com/jbossnetwork/restricted/listSoftware.html?product=webserver&downloadType=securityPatches&version=2.0.1

6. Contact:

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

Copyright 2014 Red Hat, Inc.
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