Microsoft Security Bulletin MS03-030: Unchecked Buffer in DirectX Could Enable System Compromise (Q819696)

2003-07-24T00:00:00
ID SECURITYVULNS:DOC:4888
Type securityvulns
Reporter Securityvulns
Modified 2003-07-24T00:00:00

Description

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Title: Unchecked Buffer in DirectX Could Enable System Compromise (819696) Date: July 23, 2003 Software: Microsoft DirectX(r) 5.2 on Windows 98 Microsoft DirectX 6.1 on Windows 98 SE Microsoft DirectX 7.0a on Windows Millennium Edition Microsoft DirectX 7.0 on Windows 2000 Microsoft DirectX 8.1 on Windows XP Microsoft DirectX 8.1 on Windows Server 2003 Microsoft DirectX 9.0a when installed on Windows 98 Microsoft DirectX 9.0a when installed on Windows 98 SE Microsoft DirectX 9.0a when installed on Windows Millennium Edition Microsoft DirectX 9.0a when installed on Windows 2000 Microsoft DirectX 9.0a when installed on Windows XP Microsoft DirectX(r) 9.0a when installed on Windows Server 2003 Microsoft Windows NT 4.0 Server with either Windows Media Player 6.4 or Internet Explorer 6 Service Pack 1 installed. Microsoft Windows NT 4.0, Terminal Server Edition with either Windows Media Player 6.4 or Internet Explorer 6 Service Pack 1 installed.

Impact: Allow an attacker to execute code on a user's system Max Risk: Critical Bulletin: MS03-030

Microsoft encourages customers to review the Security Bulletins at: http://www.microsoft.com/technet/security/bulletin/MS03-030.asp http://www.microsoft.com/security/security_bulletins/ms03-030.asp


Issue:

DirectX consists of a set of low-level Application Programming Interfaces (APIs) that are used by Windows programs for multimedia support. Within DirectX, the DirectShow technology performs client- side audio and video sourcing, manipulation, and rendering.

There are two buffer overruns with identical effects in the function used by DirectShow to check parameters in a Musical Instrument Digital Interface (MIDI) file. A security vulnerability results because it would be possible for a malicious user to attempt to exploit these flaws and execute code in the security context of the logged-on user.

An attacker could seek to exploit this vulnerability by creating a specially crafted MIDI file designed to exploit this vulnerability and then host it on a Web site or on a network share, or send it by using an HTML-based e-mail. In the case where the file was hosted on a Web site or network share, the user would need to open the specially crafted file. If the file was embedded in a page the vulnerability could be exploited when a user visited the Web page. In the HTML-based e-mail case, the vulnerability could be exploited when a user opened or previewed the HTML-based e-mail. A successful attack could cause DirectShow, or an application making use of DirectShow, to fail. A successful attack could also cause an attacker's code to run on the user's computer in the security context of the user.

Mitigating Factors:

    • By default, Internet Explorer on Windows Server 2003 runs in Enhanced Security Configuration. This default configuration of Internet Explorer blocks the e-mail-based vector of this attack because Microsoft Outlook Express running on Windows Server 2003 by default reads e-mail in plain text. If Internet Explorer Enhanced Security Configuration were disabled, the protections put in place that prevent this vulnerability from being exploited would be removed.
    • In the Web-based attack scenario, the attacker would have to host a Web site that contained a Web page used to exploit these vulnerabilities. An attacker would have no way to force users to visit a malicious Web site outside the HTML-based e-mail vector. Instead, the attacker would need to lure them there, typically by getting them to click a link that would take them to the attacker's site.
  • -The combination of the above means that on Windows Server 2003 an administrator browsing only to trusted sites should be safe from this vulnerability.
    • Code executed on the system would only run under the privileges of the logged-on user.

Risk Rating:

  • Critical

Patch Availability:

  • A patch is available to fix this vulnerability. Please read the Security Bulletins at http://www.microsoft.com/technet/security/bulletin/ms03-030.asp http://www.microsoft.com/security/security_bulletins/ms03-030.asp for information on obtaining this patch.

Acknowledgment:

  • eEye Digital Security, http://www.eeye.com

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.

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