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The U.S. Department of Energy
Computer Incident Advisory Capability
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INFORMATION BULLETIN
Microsoft Unchecked Buffer in Content Management Server
[Microsoft Security Bulletin MS02-041]
August 8, 2002 19:00 GMT Number M-107
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PROBLEM: Three vulnerabilities have been identified in the Microsoft
Content Management Server (MCMS).
1) Buffer Overrun in MCMS Authentication Operation
2) Program Execution via MCMS Authoring Function
3) SQL Injection via MCMS Resource Request
SOFTWARE: Microsoft Content Management Server 2001
DAMAGE: Exploiting these vulnerabilities range from a buffer overrun to
gaining root access.
SOLUTION: Apply available patches.
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VULNERABILITY The risk is HIGH. The most serious of these vulnerabilities
ASSESSMENT: could enable an attacker to gain full control over the server.
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LINKS:
CIAC BULLETIN: http://www.ciac.org/ciac/bulletins/m-107.shtml
ORIGINAL BULLETIN:
http://www.microsoft.com/technet/treeview/default.asp?url=/
technet/security/bulletin/MS02-041.asp
PATCHES:
http://www.microsoft.com/Downloads/Release.asp?ReleaseID=41266
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[***** Start Microsoft Security Bulletin MS02-041 *****]
Microsoft Security Bulletin MS02-041
Unchecked Buffer in Content Management Server Could Enable Server Compromise (Q326075)
Originally posted: August 7, 2002
Summary
Who should read this bulletin: System administrators using Microsoft® Content
Management Server 2001.
Impact of vulnerability: Three vulnerabilities, the most serious of which could enable
an attacker to gain full control over the server
Maximum Severity Rating: Critical
Recommendation: System administrators should apply the patch immediately.
Affected Software:
Microsoft Content Management Server 2001
Technical details
Technical description:
Microsoft Content Management Server (MCMS) 2001 is a .Net Enterprise Server product
that simplifies developing and managing e-business web sites. Microsoft has learned of
three security vulnerabilities affecting it:
A buffer overrun in a low-level function that performs user authentication. At least
one web page included with MCMS 2001 passes inputs directly to the function, thereby
potentially providing a way for an attacker to overrun the buffer. The result of
exploiting the vulnerability would be to either cause MCMS to fail, or run code in the
context of the MCMS service (which runs as Local System).
A vulnerability resulting from the confluence of two flaws affecting a function that
allows files to be uploaded to the server. The first flaw lies in how the function
authenticates requests, and would allow any user to submit an upload request. The
second results because it is possible to override the upload location; where the
function should upload files to a folder that only privileged users can access, it can
be overridden to upload it to a temporary folder that does allow unprivileged users to
call it. By exploiting the two flaws in tandem, an attacker could upload an .ASP or
other file to the server, in a location from which it could be executed.
A SQL injection vulnerability affecting a function that services requests for image
files and other resources. Exploiting the vulnerability could enable an attacker to
run SQL commands on the server, which would not only allow data in the MCMS database
to be added, changed or deleted, but also would enable the attacker to run operating
system commands on the server.
Mitigating factors:
Buffer Overrun in MCMS Authentication Operation:
The scope of the vulnerability could be significantly reduced if the URLScan tool were
deployed on the server. It is likely that in this case, the vulnerability could only
be used for denial of service attacks.
Program Execution via MCMS Authoring Function:
Exploiting the vulnerability would not grant the attacker administrative privileges on
the server. Instead, the attacker's code would execute in the security context of the
Web Application Manager (the IWAM_computername account), which has similar privileges
to those of an interactively logged-on user.
SQL Injection via MCMS Resource Request:
Exploiting the vulnerability would not grant the attacker administrative privileges on
the server. Instead, any operating system commands would be levied in the security
context of the SQL Server™ 2000 service, which by default has only Domain User
privileges.
Severity Rating:
Buffer Overrun in MCMS Authentication Operation:
Internet Servers - Critical
Intranet Servers - Critical
Client Systems - None
Program Execution via MCMS Authoring Function:
Internet Servers - Moderate
Intranet Servers - Moderate
Client Systems - None
SQL Injection via MCMS Resource Request:
Internet Servers - Moderate
Intranet Servers - Moderate
Client Systems - None
The above assessment is based on the types of systems affected by the vulnerability,
their typical deployment patterns, and the effect that exploiting the vulnerability
would have on them.
Vulnerability identifiers:
Buffer Overrun in MCMS Authentication Operation:
CVE-CAN-2002-0700
Program Execution via MCMS Authoring Function:
CVE-CAN-2002-0718
SQL Injection via MCMS Resource Request:
CVE-CAN-2002-0719
Tested Versions:
Microsoft tested Microsoft Content Management Server 2001 to assess whether it is
affected by these vulnerabilities. Previous versions are no longer supported, and may
or may not be affected by these vulnerabilities.
Patch availability
Download locations for this patch
Microsoft Content Management Server 2001:
http://www.microsoft.com/Downloads/Release.asp?ReleaseID=41266
Additional information about this patch
Installation platforms:
This patch can be installed on systems running Microsoft Content Management Server
2001 Service Pack 1
Inclusion in future service packs:
The fix for this issue will be included in Microsoft Content Management Server 2001
Service Pack 2.
Reboot needed: No
Patch can be uninstalled: Yes
Superseded patches: None.
Verifying patch installation:
To verify that the patch has been installed on the machine, confirm that the following
registry key has been created on the machine:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Updates\MCMS 2001\Q326075
Caveats:
None
Localization:
Microsoft Content Management Server 2001 is English only, so localized patches are not
required.
Obtaining other security patches:
Patches for other security issues are available from the following locations:
Security patches are available from the Microsoft Download Center, and can be most
easily found by doing a keyword search for "security_patch".
Patches for consumer platforms are available from the WindowsUpdate web site
Other information:
Acknowledgments
Microsoft thanks Joao Gouveia for reporting this issue to us and working with us to
protect customers.
Support:
Microsoft Knowledge Base article Q326075 discusses this issue and will be available
approximately 24 hours after the release of this bulletin. Knowledge Base articles can
be found on the Microsoft Online Support web site.
Technical support is available from Microsoft Product Support Services. There is no
charge for support calls associated with security patches.
Security Resources: The Microsoft TechNet Security Web Site provides additional
information about security in Microsoft products.
Disclaimer:
The information provided in the Microsoft Knowledge Base is provided "as is" without
warranty of any kind. Microsoft disclaims all warranties, either express or implied,
including the warranties of merchantability and fitness for a particular purpose. In
no event shall Microsoft Corporation or its suppliers be liable for any damages
whatsoever including direct, indirect, incidental, consequential, loss of business
profits or special damages, even if Microsoft Corporation or its suppliers have been
advised of the possibility of such damages. Some states do not allow the exclusion or
limitation of liability for consequential or incidental damages so the foregoing
limitation may not apply.
Revisions:
V1.0 (August 7, 2002): Bulletin Created.
[***** End Microsoft Security Bulletin MS02-041 *****]
_______________________________________________________________________________
CIAC wishes to acknowledge the contributions of Microsoft 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
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E-mail: ciac@ciac.org
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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
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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
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