RESTEasy before 2.3.1 allows remote attackers to read arbitrary files via an external entity reference in a DOM document, aka an XML external entity (XXE) injection attack.

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Issued:

2012-07-05

Updated:

2012-07-05

**RHSA-2012:1058 - Security Advisory**

*   Overview
*   Updated Packages

**Synopsis**

Moderate: resteasy security update

**Type/Severity**

Security Advisory: Moderate

**Red Hat Insights patch analysis**

Identify and remediate systems affected by this advisory.

View affected systems

**Topic**

Updated resteasy packages that fix one security issue are now available for  
JBoss Enterprise Web Platform 5.1.2 for Red Hat Enterprise Linux 4, 5, and  
6.  

The Red Hat Security Response Team has rated this update as having moderate  
security impact. A Common Vulnerability Scoring System (CVSS) base score,  
which gives a detailed severity rating, is available from the CVE link in  
the References section.  

**Description**

RESTEasy provides various frameworks to help you build RESTful web services  
and RESTful Java applications.  

It was found that RESTEasy was vulnerable to XML External Entity (XXE)  
attacks. If a remote attacker submitted a request containing an external  
XML entity to a RESTEasy endpoint, the entity would be resolved, allowing  
the attacker to read files accessible to the user running the application  
server. This flaw affected DOM (Document Object Model) Document and JAXB  
(Java Architecture for XML Binding) input. (CVE-2012-0818)  

Note: The fix for CVE-2012-0818 is not enabled by default. This update adds  
a new configuration option to disable entity expansion in RESTEasy. If  
applications on your server expose RESTEasy XML endpoints, a  
resteasy.document.expand.entity.references configuration snippet must be  
added to their web.xml file to disable entity expansion in RESTEasy. Refer  
to Red Hat Bugzilla bug 785631 for details.  

Warning: Before applying this update, back up your JBoss Enterprise Web  
Platform's "jboss-as-web/server/\[PROFILE\]/deploy/" directory and any other  
customized configuration files.  

Users of JBoss Enterprise Web Platform 5.1.2 on Red Hat Enterprise Linux 4,  
5, and 6 should upgrade to these updated packages, which correct this  
issue. The JBoss server process must be restarted for this update to take  
effect.  

**Solution**

Before applying this update, make sure all previously-released errata  
relevant to your system have been applied.  

This update is available via the Red Hat Network. Details on how to  
use the Red Hat Network to apply this update are available at  
https://access.redhat.com/knowledge/articles/11258

**Affected Products**

*   JBoss Enterprise Web Platform 5 for RHEL 6 x86\_64
*   JBoss Enterprise Web Platform 5 for RHEL 6 i386
*   JBoss Enterprise Web Platform 5 for RHEL 5 x86\_64
*   JBoss Enterprise Web Platform 5 for RHEL 5 i386

**Fixes**

*   BZ - 785631 - CVE-2012-0818 RESTEasy: XML eXternal Entity (XXE) flaw

**References**

*   https://access.redhat.com/security/updates/classification/#moderate
*   https://bugzilla.redhat.com/show\_bug.cgi?id=785631

**JBoss Enterprise Web Platform 5 for RHEL 6**

SRPM

resteasy-1.2.1-10.CP02\_patch01.1.ep5.el6.src.rpm

SHA-256: 3a4aa131006b3f037162518ce8d3881cf20627e5fad57dc0178d16f51a3f2c34

x86\_64

resteasy-1.2.1-10.CP02\_patch01.1.ep5.el6.noarch.rpm

SHA-256: f6cf36beb96b4eba2422aaa299680bb5998f3bb2e666d1440e17402778064556

resteasy-examples-1.2.1-10.CP02\_patch01.1.ep5.el6.noarch.rpm

SHA-256: 66e767ff2fb833d7110ada14a4cfca2855dd0e6f0a06ee5bcaa3f164b36773aa

resteasy-javadoc-1.2.1-10.CP02\_patch01.1.ep5.el6.noarch.rpm

SHA-256: 87ce316af43982a162478015b480121e4519cde5bb925f9b7dfe4d15e743a6a7

resteasy-manual-1.2.1-10.CP02\_patch01.1.ep5.el6.noarch.rpm

SHA-256: 99aaf805ad64df41f06723f68dc403f1c4ff9a8e03e56d08d1ccca29c53e19d5

i386

resteasy-1.2.1-10.CP02\_patch01.1.ep5.el6.noarch.rpm

SHA-256: f6cf36beb96b4eba2422aaa299680bb5998f3bb2e666d1440e17402778064556

resteasy-examples-1.2.1-10.CP02\_patch01.1.ep5.el6.noarch.rpm

SHA-256: 66e767ff2fb833d7110ada14a4cfca2855dd0e6f0a06ee5bcaa3f164b36773aa

resteasy-javadoc-1.2.1-10.CP02\_patch01.1.ep5.el6.noarch.rpm

SHA-256: 87ce316af43982a162478015b480121e4519cde5bb925f9b7dfe4d15e743a6a7

resteasy-manual-1.2.1-10.CP02\_patch01.1.ep5.el6.noarch.rpm

SHA-256: 99aaf805ad64df41f06723f68dc403f1c4ff9a8e03e56d08d1ccca29c53e19d5

**JBoss Enterprise Web Platform 5 for RHEL 5**

SRPM

resteasy-1.2.1-10.CP02\_patch01.1.ep5.el5.src.rpm

SHA-256: ee147792cda48183d01057a03330a79257b1d81ce6d7ea8620db591b98068b31

x86\_64

resteasy-1.2.1-10.CP02\_patch01.1.ep5.el5.noarch.rpm

SHA-256: f56fa438a6f2224e0d202a6b8de6a0932381c09aa5fc55eaa78301f156bd7b8f

resteasy-examples-1.2.1-10.CP02\_patch01.1.ep5.el5.noarch.rpm

SHA-256: e8412efaa309aa52bfb86f39ac3009e5d0033e3c9f568da90436f2443e3d038e

resteasy-javadoc-1.2.1-10.CP02\_patch01.1.ep5.el5.noarch.rpm

SHA-256: ce177e7e41c6651fbebe4b3ac6235cb0a2f79482a9ee9067ae36391be84351b1

resteasy-manual-1.2.1-10.CP02\_patch01.1.ep5.el5.noarch.rpm

SHA-256: 9ebfc64848b1f317822f255d08e9bcb72c85e69ff4965836ab0884cdc68ca0f6

i386

resteasy-1.2.1-10.CP02\_patch01.1.ep5.el5.noarch.rpm

SHA-256: f56fa438a6f2224e0d202a6b8de6a0932381c09aa5fc55eaa78301f156bd7b8f

resteasy-examples-1.2.1-10.CP02\_patch01.1.ep5.el5.noarch.rpm

SHA-256: e8412efaa309aa52bfb86f39ac3009e5d0033e3c9f568da90436f2443e3d038e

resteasy-javadoc-1.2.1-10.CP02\_patch01.1.ep5.el5.noarch.rpm

SHA-256: ce177e7e41c6651fbebe4b3ac6235cb0a2f79482a9ee9067ae36391be84351b1

resteasy-manual-1.2.1-10.CP02\_patch01.1.ep5.el5.noarch.rpm

SHA-256: 9ebfc64848b1f317822f255d08e9bcb72c85e69ff4965836ab0884cdc68ca0f6

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

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