Microsoft Visual Studio Could Allow Users to Crash the Debugger or to Execute Code on the Server
SecurityTracker Alert ID: 1001172|
SecurityTracker URL: http://securitytracker.com/id/1001172
(Links to External Site)
Date: Mar 28 2001
Denial of service via network, Execution of arbitrary code via local system|
Fix Available: Yes Vendor Confirmed: Yes |
Version(s): 6.0 Enterprise Edition|
Microsoft issued a bulletin (MS01-018) announcing a vulnerability in Visual Studio that could result in limited denial of service conditions or could cause arbitrary code to be executed with the privileges of the logged-on user.|
The VB-TSQL debugger object that ships with Visual Studio 6.0 Enterprise Edition fails to check a buffer in the code that processes parameters for one of the object's methods. Because the object can be programmatically accessed remotely, the object could be referenced by a program that contained malformed data within the parameter to exploit the vulnerability.
This could cause the object to crash or could cause arbitrary code to be executed on the host with the privileges of the logged-on user.
The vendor notes that Visual Studio 6.0 Professional Edition is not affected.
A remote user with network access to the debugger object could cause the object to crash or could cause arbitrary code to be executed on the host with the privileges of the logged-on user.|
The vendor has released a patch. See the vendor bulletin for more information.|
Vendor URL: www.microsoft.com/technet/security/bulletin/MS01-018.asp (Links to External Site)
|Underlying OS: Windows (Any)|
Source Message Contents
Subject: Microsoft Security Bulletin MS01-018|
The following is a Security Bulletin from the Microsoft Product Security
Please do not reply to this message, as it was sent from an unattended
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Title: Visual Studio VB-TSQL Object Contains Unchecked Buffer
Date: 27 March 2001
Software: Visual Studio 6.0 Enterprise Edition
Impact: Run code of attacker's choice
Microsoft encourages customers to review the Security Bulletin at:
The VB-TSQL debugger object that ships with Visual Studio 6.0
Enterprise Edition has an unchecked buffer in the code that
processes parameters for one of the object's methods. Theobject can,
by design, be programmatically accessed remotely. If the object were
to be referenced by a program that contained specially malformed
data within the parameter, eitherof two outcomes would result. In
the less serious case, the attacker could cause the object to fail
on the hosting machine. In the more serious case, the attacker could
exploit the buffer overrun to run code of the attacker's choice on
the hosting machine.
The debugger object (vbsdicli.exe) is installed by default with
Visual Studio 6.0 Enterprise Edition and runs in the context of the
interactively logged-on user. The attacker could only execute a
successful attack if he knew that a user had the component installed
and that the user was logged in at the time of the attack.
- If best practices have been followed and ports 137-139 and 445
been blocked at an organization's router or firewall, this attack
could not be executed from the Internet.
- There is no way to determine remotely if a machine has the
component installed. An attacker would need to successively target
machines until he found one that was susceptible.
- The vulnerability could only be exploited if an interactive user
were logged on to the target machine at the time of the malicious
- Only the Enterprise Edition of Visual Studio 6.0 is affected.
Visual Studio 6.0 Professional Edition is not affected.
- A patch is available to fix this vulnerability. Please read the
for information on obtaining this patch.
- BindView's Razor Team (http://razor.bindview.com)
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