Alert: Microsoft Security Bulletin MS04-007 - ASN.1 Vulnerability Could Allow Code Execution (828028)
From: Russ (Russ.Cooper_at_RC.ON.CA)
Date: 02/10/04
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Date: Tue, 10 Feb 2004 15:36:11 -0500 To: NTBUGTRAQ@LISTSERV.NTBUGTRAQ.COM
Microsoft Security Bulletin MS04-007:
ASN.1 Vulnerability Could Allow Code Execution (828028)
Bulletin URL:
http://www.microsoft.com/technet/security/bulletin/MS04-007.asp
Summary:
Version Number: V1.0
Revision Date: 02-10-2004
Impact of Vulnerability: Remote Code Execution
Maximum Severity Rating: Critical
Patch(es) Replaced: None
Caveats: Windows NT 4.0 (Workstation, Server, and Terminal Server
Edition) does not install the affected file by default. This file is
installed as part of the MS03-041 Windows NT 4.0 security update and
other possible non-security-related hotfixes. If the Windows NT 4.0
security update for MS03-041 is not installed, this may not be a
required update. To verify if the affected file is installed, search for
the file named Msasn1.dll. If this file is present, this security update
is required. Windows Update, Software Update Services, and the Microsoft
Security Baseline Analyzer will also correctly detect if this update is
required.
CVE Number(s): CAN-2003-0818
Tested Software:
Affected Software:
* Microsoft Windows NT® Workstation 4.0 Service Pack 6a
<http://www.ntbugtraq.com/link/92400199-B3D5-4826-98D4-F134849F5249.asp>
* Microsoft Windows NT Server 4.0 Service Pack 6a
<http://www.ntbugtraq.com/link/E8315430-90CD-4B20-8F54-58527932B588.asp>
* Microsoft Windows NT Server 4.0 Terminal Server Edition Service Pack
6
<http://www.ntbugtraq.com/link/D83B39D3-FF13-4D0B-B406-A225AED0D659.asp>
* Microsoft Windows 2000 Service Pack 2, Microsoft Windows 2000 Service
Pack 3, Microsoft 2000 Windows Service Pack 4
<http://www.ntbugtraq.com/link/191853C4-A4D2-4797-A8C6-A2E663A53698.asp>
* Microsoft Windows XP, Microsoft Windows XP Service Pack 1
<http://www.ntbugtraq.com/link/0CC30297-D4AE-48E9-ACD0-1343D89CCBBA.asp>
* Microsoft Windows XP 64-Bit Edition, Microsoft Windows XP 64-Bit
Edition Service Pack 1
<http://www.ntbugtraq.com/link/383C397F-9318-4AD5-9C2C-0577118A1E68.asp>
* Microsoft Windows XP 64-Bit Edition Version 2003, Microsoft Windows
XP 64-Bit Edition Version 2003 Service Pack 1
<http://www.ntbugtraq.com/link/FA280168-66E1-4B5F-958F-E178C3F61F7C.asp>
* Microsoft Windows Server™ 2003
<http://www.ntbugtraq.com/link/3D7FFFF9-A497-42FF-90E7-283732B2E117.asp>
* Microsoft Windows Server 2003 64-Bit Edition
<http://www.ntbugtraq.com/link/FA280168-66E1-4B5F-958F-E178C3F61F7C.asp>
Software Not Affected:
Technical Description:
A security vulnerability exists in the Microsoft ASN.1 Library that
could allow code execution on an affected system. The vulnerability is
caused by an unchecked buffer in the Microsoft ASN.1 Library, which
could result in a buffer overflow.
An attacker who successfully exploited this buffer overflow
vulnerability could execute code with system privileges on an affected
system. The attacker could then take any action on the system, including
installing programs, viewing data, changing data, deleting data, or
creating new accounts with full privileges.
Abstract Syntax Notation 1 (ASN.1) is a data standard that is used by
many applications and devices in the technology industry for allowing
the normalization and understanding of data across various platforms.
More information about ASN.1 can be found in Microsoft Knowledge Base
Article 252648.
This email is sent to NTBugtraq automagically as a service to my
subscribers. (v2.3)
Cheers,
Russ - Surgeon General of TruSecure Corporation/NTBugtraq Editor
-----
NTBugtraq Editor's Note:
Most viruses these days use spoofed email addresses. As such, using an Anti-Virus product which automatically notifies the perceived sender of a message it believes is infected may well cause more harm than good. Someone who did not actually send you a virus may receive the notification and scramble their support staff to find an infection which never existed in the first place. Suggest such notifications be disabled by whomever is responsible for your AV, or at least that the idea is considered.
-----
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