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Category:   Application (Web Server/CGI)  >   Apache Vendors:   Apache Software Foundation
(Red Hat Issues Fix) Apache Input Validation Hole in mod_proxy_ftp Permits Cross-Site Scripting Attacks
SecurityTracker Alert ID:  1019248
SecurityTracker URL:  http://securitytracker.com/id/1019248
CVE Reference:   CVE-2008-0005   (Links to External Site)
Date:  Jan 21 2008
Impact:   Disclosure of authentication information, Disclosure of user information, Execution of arbitrary code via network, Modification of user information
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 1.3.x, 2.0.x, 2.2.x
Description:   A vulnerability was reported in Apache mod_proxy_ftp. A remote user can conduct cross-site scripting attacks.

The mod_proxy_ftp module does not properly filter HTML code from UTF-7 character set user-supplied input before displaying the input. A remote user can create a specially crafted URL that, when loaded by a target user, will cause arbitrary scripting code to be executed by the target user's browser. The code will originate from the site running the Apache software and will run in the security context of that site. As a result, the code will be able to access the target user's cookies (including authentication cookies), if any, associated with the site, access data recently submitted by the target user via web form to the site, or take actions on the site acting as the target user.

sp3x of SecurityReason reported this vulnerability.

The original advisory is available at:

http://securityreason.com/achievement_securityalert/49
Impact:   A remote user can access the target user's cookies (including authentication cookies), if any, associated with the site running the Apache software, access data recently submitted by the target user via web form to the site, or take actions on the site acting as the target user.
Solution:   Red Hat has released a fix.

The Red Hat advisory is available at:

https://rhn.redhat.com/errata/RHSA-2008-0009.html
Vendor URL:  httpd.apache.org/ (Links to External Site)
Cause:   Input validation error
Underlying OS:   Linux (Red Hat Enterprise)

Message History:   This archive entry is a follow-up to the message listed below.
Jan 11 2008 Apache Input Validation Hole in mod_proxy_ftp Permits Cross-Site Scripting Attacks


 Source Message Contents
Date:  Mon, 21 Jan 2008 04:37:29 -0500
Subject:  [RHSA-2008:0009-01] Moderate: httpd security update


-----BEGIN PGP SIGNED MESSAGE-----
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=====================================================================
                   Red Hat Security Advisory

Synopsis:          Moderate: httpd security update
Advisory ID:       RHSA-2008:0009-01
Product:           Red Hat Application Stack
Advisory URL:      https://rhn.redhat.com/errata/RHSA-2008-0009.html
Issue date:        2008-01-21
CVE Names:         CVE-2007-5000 CVE-2007-6388 CVE-2007-6421 
                   CVE-2007-6422 CVE-2008-0005 
=====================================================================

1. Summary:

Updated Apache httpd packages that correct several security issues are now
available for Red Hat Application Stack v2.

This update has been rated as having moderate security impact by the Red
Hat Security Response Team.

2. Relevant releases/architectures:

Red Hat Application Stack v2 for Enterprise Linux (v.5) - i386, x86_64

3. Description:

The Apache HTTP Server is a popular and freely-available Web server.

These updated httpd packages resolve the following security issues:

A flaw was found in the mod_imagemap module. On sites where mod_imagemap
was enabled and an imagemap file was publicly available, a cross-site
scripting attack was possible.  (CVE-2007-5000)

A flaw was found in the mod_status module. On sites where mod_status was
enabled and the status pages were publicly accessible, a cross-site
scripting attack was possible.  (CVE-2007-6388)

A flaw was found in the mod_proxy_balancer module. On sites where
mod_proxy_balancer was enabled, a cross-site scripting attack against an
authorized user was possible.  (CVE-2007-6421)

A flaw was found in the mod_proxy_balancer module. On sites where
mod_proxy_balancer was enabled, an authorized user could send a carefully
crafted request that would cause the Apache child process handling that
request to crash. This could lead to a denial of service if using a
threaded Multi-Processing Module.  (CVE-2007-6422)

A flaw was found in the mod_proxy_ftp module. On sites where mod_proxy_ftp
was enabled and a forward proxy was configured, a cross-site scripting
attack was possible against browsers which do not correctly derive the
response character set following the rules in RFC 2616. (CVE-2008-0005)

Users of httpd should upgrade to these updated packages, which contain
backported patches to correct these issues. Users should restart httpd
after installing this update.

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/):

419931 - CVE-2007-5000 mod_imagemap XSS
427228 - CVE-2007-6388 apache mod_status cross-site scripting
427229 - CVE-2007-6421 httpd mod_proxy_balancer cross-site scripting
427230 - CVE-2007-6422 httpd mod_proxy_balancer crash
427739 - CVE-2008-0005 mod_proxy_ftp XSS

6. Package List:

Red Hat Application Stack v2 for Enterprise Linux (v.5):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/5Server/en/RHWAS/SRPMS/httpd-2.2.4-9.el5s2.src.rpm

i386:
httpd-2.2.4-9.el5s2.i386.rpm
httpd-debuginfo-2.2.4-9.el5s2.i386.rpm
httpd-devel-2.2.4-9.el5s2.i386.rpm
httpd-manual-2.2.4-9.el5s2.i386.rpm
mod_ssl-2.2.4-9.el5s2.i386.rpm

x86_64:
httpd-2.2.4-9.el5s2.x86_64.rpm
httpd-debuginfo-2.2.4-9.el5s2.i386.rpm
httpd-debuginfo-2.2.4-9.el5s2.x86_64.rpm
httpd-devel-2.2.4-9.el5s2.i386.rpm
httpd-devel-2.2.4-9.el5s2.x86_64.rpm
httpd-manual-2.2.4-9.el5s2.x86_64.rpm
mod_ssl-2.2.4-9.el5s2.x86_64.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-2007-5000
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-6388
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-6421
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-6422
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-0005
http://www.redhat.com/security/updates/classification/#moderate

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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