(Red Hat Issues Fix for JBoss) Tomcat UTF-8 'AllowLinking' Java Bug Lets Remote Users Traverse the Directory
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SecurityTracker Alert ID: 1020907 |
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SecurityTracker URL: http://securitytracker.com/id/1020907
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CVE Reference:
CVE-2008-2938
(Links to External Site)
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Date: Sep 22 2008
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Impact:
Disclosure of system information, Disclosure of user information
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Fix Available: Yes Vendor Confirmed: Yes
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Description:
A vulnerability was reported in Tomcat. A remote user can view files on the target system. JBoss EAP is affected.
A remote user can supply a specially crafted request to view files on target system that are located outside of the document directory.
If a context is configured with allowLinking="true" and the connector is configured with URIEncoding="UTF-8", the system may be vulnerable.
A demonstration exploit URL is provided:
http://[target]/%c0%ae%c0%ae/%c0%ae%c0%ae/%c0%ae%c0%ae/foo/bar
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Impact:
A remote user can view files on the target system.
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Solution:
Red Hat has released a fix for JBoss Enterprise Application Platform, which is affected by this vulnerability.
The Red Hat advisory is available at:
https://rhn.redhat.com/errata/RHSA-2008-0877.html
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Cause:
Input validation error
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Underlying OS:
Linux (Red Hat Enterprise)
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Message History:
This archive entry is a follow-up to the message listed below.
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Source Message Contents
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Date: Mon, 22 Sep 2008 10:19:14 -0400
Subject: [RHSA-2008:0877-02] Important: jbossweb security update
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-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1
=====================================================================
Red Hat Security Advisory
Synopsis: Important: jbossweb security update
Advisory ID: RHSA-2008:0877-02
Product: JBoss Enterprise Application Platform
Advisory URL: https://rhn.redhat.com/errata/RHSA-2008-0877.html
Issue date: 2008-09-22
Keywords: Security
CVE Names: CVE-2008-2370 CVE-2008-2938
=====================================================================
1. Summary:
An updated jbossweb package that fixes various security issues is now
available for JBoss Enterprise Application Platform (JBoss EAP) 4.2 and
4.3.
This update has been rated as having important security impact by the Red
Hat Security Response Team.
2. Relevant releases/architectures:
JBoss Enterprise Application Platform for RHEL 4 AS - noarch
JBoss Enterprise Application Platform 4.3.0 for RHEL 4 AS - noarch
JBoss Enterprise Application Platform for RHEL 4 ES - noarch
JBoss Enterprise Application Platform 4.3.0 for RHEL 4 ES - noarch
JBoss Enterprise Application Platform for RHEL 5 Server - noarch
JBoss Enterprise Application Platform 4.3.0 for RHEL 5 Server - noarch
3. Description:
JBoss Web Server (jbossweb) is an enterprise ready web server designed for
medium and large applications, is based on Apache Tomcat, and is embedded
into JBoss Application Server. It provides organizations with a single
deployment platform for JavaServer Pages (JSP) and Java Servlet
technologies, Microsoft® .NET, PHP, and CGI.
A traversal vulnerability was discovered when using a RequestDispatcher
in combination with a servlet or JSP. A remote attacker could utilize a
specially-crafted request parameter to access protected web resources.
(CVE-2008-2370)
An additional traversal vulnerability was discovered when the
"allowLinking" and "URIencoding" settings were activated. A remote attacker
could use a UTF-8-encoded request to extend their privileges and obtain
local files accessible to the jbossweb process. (CVE-2008-2938)
Users of jbossweb should upgrade to this updated package, which contains
backported patches to resolve these issues.
4. Solution:
Before applying this update, make sure that all previously-released
errata relevant to your system have been applied.
This update is available via Red Hat Network. Details on how to use
the Red Hat Network to apply this update are available at
http://kbase.redhat.com/faq/FAQ_58_10188
5. Bugs fixed (http://bugzilla.redhat.com/):
456120 - CVE-2008-2938 tomcat Unicode directory traversal vulnerability
457934 - CVE-2008-2370 tomcat RequestDispatcher information disclosure vulnerability
6. Package List:
JBoss Enterprise Application Platform for RHEL 4 AS:
Source:
ftp://updates.redhat.com/enterprise/4AS/en/JBEAP/SRPMS/jbossweb-2.0.0-5.CP07.0jpp.ep1.1.el4.src.rpm
noarch:
jbossweb-2.0.0-5.CP07.0jpp.ep1.1.el4.noarch.rpm
JBoss Enterprise Application Platform 4.3.0 for RHEL 4 AS:
Source:
ftp://updates.redhat.com/enterprise/4AS/en/JBEAP/SRPMS/jbossweb-2.0.0-5.CP07.0jpp.ep1.1.el4.src.rpm
noarch:
jbossweb-2.0.0-5.CP07.0jpp.ep1.1.el4.noarch.rpm
JBoss Enterprise Application Platform for RHEL 4 ES:
Source:
ftp://updates.redhat.com/enterprise/4ES/en/JBEAP/SRPMS/jbossweb-2.0.0-5.CP07.0jpp.ep1.1.el4.src.rpm
noarch:
jbossweb-2.0.0-5.CP07.0jpp.ep1.1.el4.noarch.rpm
JBoss Enterprise Application Platform 4.3.0 for RHEL 4 ES:
Source:
ftp://updates.redhat.com/enterprise/4ES/en/JBEAP/SRPMS/jbossweb-2.0.0-5.CP07.0jpp.ep1.1.el4.src.rpm
noarch:
jbossweb-2.0.0-5.CP07.0jpp.ep1.1.el4.noarch.rpm
JBoss Enterprise Application Platform for RHEL 5 Server:
Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/5Server/en/JBEAP/SRPMS/jbossweb-2.0.0-5.CP07.0jpp.ep1.1.el5.src.rpm
noarch:
jbossweb-2.0.0-5.CP07.0jpp.ep1.1.el5.noarch.rpm
JBoss Enterprise Application Platform 4.3.0 for RHEL 5 Server:
Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/5Server/en/JBEAP/SRPMS/jbossweb-2.0.0-5.CP07.0jpp.ep1.1.el5.src.rpm
noarch:
jbossweb-2.0.0-5.CP07.0jpp.ep1.1.el5.noarch.rpm
These packages are GPG signed by Red Hat for security. Our key and
details on how to verify the signature are available from
https://www.redhat.com/security/team/key/#package
7. References:
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-2370
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-2938
http://www.redhat.com/security/updates/classification/#important
8. Contact:
The Red Hat security contact is <secalert@redhat.com>. More contact
details at https://www.redhat.com/security/team/contact/
Copyright 2008 Red Hat, Inc.
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