vxWeb Can Be Crashed By Remote Users
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SecurityTracker Alert ID: 1014910
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SecurityTracker URL: http://securitytracker.com/id?1014910
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CVE Reference: CVE-2005-3033
(Links to External Site)
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Updated: Jun 8 2008
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Original Entry Date: Sep 15 2005
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Impact: Denial of service via network
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Exploit Included: Yes
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Advisory: Airscanner
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Version(s): 1.1.4
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Description: A vulnerability was reported in vxWeb. A remote user can crash the web service.
A remote user can send a specially crafted HTTP GET request to the target web service to trigger a stack overflow and cause the web
service to crash.
A demonstration exploit request is provided:
GET /Ax1000
Seth Fogie of Airscanner Mobile Security reported
this vulnerability.
The original advisory is available at:
http://www.airscanner.com/security/05081101_vxweb.htm
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Impact: A remote user can cause the web service to crash.
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Solution: No solution was available at the time of this entry.
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Vendor URL: www.cam.com/vxweb.html (Links to External Site)
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Cause: Boundary error
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Underlying OS: Windows (CE)
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Reported By: contact@airscanner.com
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Message History:
None.
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Source Message Contents
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Date: Thu, 15 Sep 2005 00:44:59 +0000
From: contact@airscanner.com
Subject: Airscanner Mobile Security Advisory #05081101: vxWeb v.1.1.4 Denial of
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Airscanner Mobile Security Advisory #05081101:
vxWeb v.1.1.4 Denial of Service Vulnerability
Product:
vxWeb v1.1.4
Platform:
Tested on Windows Mobile Pocket PC 2003
Requirements:
Mobile device running Windows Mobile Pocket PC with vxWeb v1.1.4 installed and running.
Credits:
Seth Fogie
Airscanner Mobile Security
http://www.airscanner.com
Mobile Antivirus Researchers Association
http://www.mobileav.org
August 11 2005
Risk Level:
Low
Summary:
vxWeb is a complete multi-threaded web server for Windows CE-based devices. However, it is vulnerable
to a stack based buffer overflow
that results in an instant crash of the web server.
Details:
GET /Ax1000
.text:0001C310 BL __2_YAPAXI_Z ; operator new(uint)
The YAPAXI or set(UINT) command (located in coredll.dll) ends up reading data off the stack which can
be overwritten by a long request.
As a result, code in coredll.dll will be fed invalid datatypes, an exception will be thrown, and the
web server will crash. We were
not able to get code into the program counter (PC). We were able to manually insert values that perm
itted the yapaxi function to
continue on, but this did not result in any other interesting results.
Workaround:
None
Vendor Response:
Waiting response.
Copyright (c) 2005 Airscanner Corp.
Permission is granted for the redistribution of this alert electronically. It may not be edited in an
y way without the express written
consent of Airscanner Corp. If you wish to reprint the whole or any part of this alert in any other
medium other than electronically,
please contact Airscanner Corp. for permission.
Disclaimer: The information in the advisory is believed to be accurate at the time of publishing base
d on currently available information.
Use of the information constitutes acceptance for use on an AS IS condition. There are no warranties
with regard to this information.
Neither the author nor the publisher accepts any liability for any direct, indirect, or consequentia
l loss or damage arising from
use of, or reliance on, this information.
advisory
http://www.airscanner.com/security/05081101_vxweb.htm
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