__________________________________________________________
The U.S. Department of Energy
Computer Incident Advisory Capability
___ __ __ _ ___
/ | /_\ /
\___ __|__ / \ \___
__________________________________________________________
INFORMATION BULLETIN
Learn2 STRunner ActiveX Control Vulnerabilities
[US-CERT Vulnerability Note VU#524857]
March 4, 2008 16:00 GMT Number S-221
______________________________________________________________________________
PROBLEM: The Learn2 STRunner ActiveX control contains multiple stack
buffer overflows, which can allow a remote, unauthenticated
attacker to execute arbitrary code on a vulnerable system.
PLATFORM: Learn2 STRunner
DAMAGE: Execute arbitrary code.
SOLUTION: There is curretnly no practical solution. Please see the
bulletin below for workarounds.
______________________________________________________________________________
VULNERABILITY The risk is LOW. By convincing a user to view a specially
ASSESSMENT: crafted HTML document (e.g., a web page or an HTML email
message or attachment), an attacker may be able to execute
arbitrary code with the privileges of the user.
______________________________________________________________________________
LINKS:
CIAC BULLETIN: http://www.ciac.org/ciac/bulletins/s-221.shtml
ORIGINAL BULLETIN: http://www.kb.cert.org/vuls/id/524857
CVE: http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=
CVE-2007-6252
______________________________________________________________________________
[***** Start US-CERT Vulnerability Note VU#524857 *****]
Vulnerability Note VU#524857
Learn2 STRunner ActiveX control stack buffer overflows
Overview
The Learn2 STRunner ActiveX control contains multiple stack buffer overflows, which
can allow a remote, unauthenticated attacker to execute arbitrary code on a vulnerable
system.
I. Description
The Learn2 Corporation STRunner ActiveX control, which is provided by iestm32.dll,
can view multimedia streams that are commonly used in online tutorials. This ActiveX
control, which is also known as the Street Technologies ActiveX Control, contains
multiple stack buffer overflow vulnerabilities.
II. Impact
By convincing a user to view a specially crafted HTML document (e.g., a web
page or an HTML email message or attachment), an attacker may be able to execute
arbitrary code with the privileges of the user.
III. Solution
We are currently unaware of a practical solution to this problem. Please
consider the following workarounds:
Disable the Learn2 STRunner ActiveX control in Internet Explorer
The vulnerable ActiveX control can be disabled in Internet Explorer by
setting the kill bit for the following CLSID:
{0B72CCA4-5F11-11D0-9CB5-0000C0EC9FDB}
More information about how to set the kill bit is available in Microsoft
Support Document 240797. Alternatively, the following text can be saved as
a .REG file and imported to set the kill bit for this control:
Windows Registry Editor Version 5.00
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\ActiveX
Compatibility\{0B72CCA4-5F11-11D0-9CB5-0000C0EC9FDB}]
"Compatibility Flags"=dword:00000400
Disable ActiveX
Disabling ActiveX controls in the Internet Zone (or any zone used by an
attacker) appears to prevent exploitation of this and other ActiveX
vulnerabilities. Instructions for disabling ActiveX in the Internet Zone
can be found in the "Securing Your Web Browser" document.
Systems Affected
Vendor Status Date Updated
Learn2 Corporation Vulnerable 28-Feb-2008
References
http://www.cert.org/tech_tips/securing_browser
http://www.securityfocus.com/bid/28058
http://support.microsoft.com/kb/240797
Credit
This vulnerability was reported by Will Dormann of the CERT/CC.
This document was written by Will Dormann.
Other Information
Date Public 02/29/2008
Date First Published 02/29/2008 11:05:16 AM
Date Last Updated 02/29/2008
CERT Advisory
CVE Name CVE-2007-6252
US-CERT Technical Alerts
Metric 3.79
Document Revision 7
[***** End US-CERT Vulnerability Note VU#524857 *****]
_______________________________________________________________________________
CIAC wishes to acknowledge the contributions of US-CERT for the
information contained in this bulletin.
_______________________________________________________________________________
CIAC, the Computer Incident Advisory Capability, is the computer
security incident response team for the U.S. Department of Energy
(DOE) and the emergency backup response team for the National
Institutes of Health (NIH). CIAC is located at the Lawrence Livermore
National Laboratory in Livermore, California. CIAC is also a founding
member of FIRST, the Forum of Incident Response and Security Teams, a
global organization established to foster cooperation and coordination
among computer security teams worldwide.
CIAC services are available to DOE, DOE contractors, and the NIH. CIAC
can be contacted at:
Voice: +1 925-422-8193 (7x24)
FAX: +1 925-423-8002
STU-III: +1 925-423-2604
E-mail: ciac@ciac.org
Previous CIAC notices, anti-virus software, and other information are
available from the CIAC Computer Security Archive.
World Wide Web: http://www.ciac.org/
Anonymous FTP: ftp.ciac.org
PLEASE NOTE: Many users outside of the DOE, ESnet, and NIH computing
communities receive CIAC bulletins. If you are not part of these
communities, please contact your agency's response team to report
incidents. Your agency's team will coordinate with CIAC. The Forum of
Incident Response and Security Teams (FIRST) is a world-wide
organization. A list of FIRST member organizations and their
constituencies can be obtained via WWW at http://www.first.org/.
This document was prepared as an account of work sponsored by an
agency of the United States Government. Neither the United States
Government nor the University of California nor any of their
employees, makes any warranty, express or implied, or assumes any
legal liability or responsibility for the accuracy, completeness, or
usefulness of any information, apparatus, product, or process
disclosed, or represents that its use would not infringe privately
owned rights. Reference herein to any specific commercial products,
process, or service by trade name, trademark, manufacturer, or
otherwise, does not necessarily constitute or imply its endorsement,
recommendation or favoring by the United States Government or the
University of California. The views and opinions of authors expressed
herein do not necessarily state or reflect those of the United States
Government or the University of California, and shall not be used for
advertising or product endorsement purposes.
LAST 10 CIAC BULLETINS ISSUED (Previous bulletins available from CIAC)
S-211: Move Media Player Quantum Streaming Vulnerability
S-212: Mozilla Vulnerability in BMP Decoder
S-213: Nukedit 'email' Parameter Vulnerability
S-214: SurgeMail and WebMail 'Page' Command Vulnerability
S-215: Symantec Backup Exec Scheduler ActiveX Control Multiple Vulnerabilities
S-216: Juniper Networks Secure Access 2000 'rdremediate.cgi' Vulnerability
S-217: Drupal Multiple HTML Vulnerabilities
S-218: gd Security Update
S-219: Juniper Networks Secure Access 2000 Web Root Path Vulnerability
S-220: PHP-Nuke My_eGallery Module 'gid' Parameter Vulnerability