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  3. Microsoft Windows Hyperlink Object Library Buffer Overflow Vulnerability

Microsoft Windows Hyperlink Object Library Buffer Overflow Vulnerability

Risk

High

Date Discovered

February 8, 2005

Description

The Microsoft Windows Hyperlink Object Library is reported prone to a buffer overflow vulnerability. An attacker may exploit this condition to execute arbitrary code on a vulnerable computer, which may grant unauthorized access to the computer or lead to privilege escalation. It is reported that issue presents itself when a user follows a malformed link specially crafted by an attacker, however, other attack vectors also exist to exploit this vulnerability. Specifically, an application that employs the affected library by accepting and supplying parameters to the library may allow an attacker to exploit this vulnerability remotely and without user interaction. Local attacker vectors exist to exploit this vulnerability as well. Reportedly, an attacker with local interactive access to a vulnerable computer may pass a malicious payload to an application that supplies parameters to the affected library.

Technologies Affected

  • Microsoft Windows 2000 Advanced Server
  • Microsoft Windows 2000 Advanced Server SP1
  • Microsoft Windows 2000 Advanced Server SP2
  • Microsoft Windows 2000 Advanced Server SP3
  • Microsoft Windows 2000 Advanced Server SP4
  • Microsoft Windows 2000 Datacenter Server
  • Microsoft Windows 2000 Datacenter Server SP1
  • Microsoft Windows 2000 Datacenter Server SP2
  • Microsoft Windows 2000 Datacenter Server SP3
  • Microsoft Windows 2000 Datacenter Server SP4
  • Microsoft Windows 2000 Professional
  • Microsoft Windows 2000 Professional SP1
  • Microsoft Windows 2000 Professional SP2
  • Microsoft Windows 2000 Professional SP3
  • Microsoft Windows 2000 Professional SP4
  • Microsoft Windows 2000 Server
  • Microsoft Windows 2000 Server SP1
  • Microsoft Windows 2000 Server SP2
  • Microsoft Windows 2000 Server SP3
  • Microsoft Windows 2000 Server SP4
  • Microsoft Windows 98
  • Microsoft Windows 98SE
  • Microsoft Windows ME
  • Microsoft Windows Server 2003 Datacenter Edition
  • Microsoft Windows Server 2003 Datacenter Edition Itanium
  • Microsoft Windows Server 2003 Enterprise Edition
  • Microsoft Windows Server 2003 Enterprise Edition Itanium
  • Microsoft Windows Server 2003 Standard Edition
  • Microsoft Windows Server 2003 Web Edition
  • Microsoft Windows XP 64-bit Edition
  • Microsoft Windows XP 64-bit Edition SP1
  • Microsoft Windows XP 64-bit Edition Version 2003
  • Microsoft Windows XP Home
  • Microsoft Windows XP Home SP1
  • Microsoft Windows XP Home SP2
  • Microsoft Windows XP Media Center Edition
  • Microsoft Windows XP Media Center Edition SP1
  • Microsoft Windows XP Media Center Edition SP2
  • Microsoft Windows XP Professional
  • Microsoft Windows XP Professional SP1
  • Microsoft Windows XP Professional SP2
  • Microsoft Windows XP Tablet PC Edition
  • Microsoft Windows XP Tablet PC Edition SP1
  • Microsoft Windows XP Tablet PC Edition SP2
  • Nortel Networks IP softphone 2050
  • Nortel Networks Mobile Voice Client 2050
  • Nortel Networks Optivity Telephony Manager (OTM)
  • Nortel Networks Symposium Call Center Server (SCCS)
  • Nortel Networks Symposium Express Call Center (SECC)

Recommendations

Permit local access for trusted individuals only. Where possible, use restricted environments and restricted shells.

To prevent against local attacks, it is recommended that local interactive access to a vulnerable computer should be provided to trusted individuals only.

Block external access at the network boundary, unless external parties require service.

Access to the affected computer may be blocked at the network perimeter. Only allow trusted computers and networks to have access to resources.

Deploy network intrusion detection systems to monitor network traffic for malicious activity.

Deploy network intrusion detection systems to monitor all network traffic for signs of suspicious or anomalous activity. This may aid in detecting attempts to exploit latent vulnerabilities or in detecting malicious activity that occurs as a result of successful exploitation.

Do not follow links provided by unknown or untrusted sources.

Users should avoid Web sites of questionable integrity and not follow links supplied by unknown or untrusted sources.

Implement multiple redundant layers of security.

Deploy applicable memory protection schemes such as non-executable stack/heap configurations and randomly mapped memory segments. This may complicate exploitation of memory corruption vulnerabilities.

Run all software as a nonprivileged user with minimal access rights.

Running all software with least privileges possible may mitigate the impact of a successful exploit attempt.
Microsoft has released updates to address this vulnerability on supported platforms. Microsoft has released updates to address this vulnerability on Windows 98, Windows 98 Second Edition, and Windows Millennium Edition. These updates are available from the Windows Update Web site. Updates for localized versions of Microsoft Windows 98 and Microsoft Windows 98 Second Edition, which are not supported by Windows Update are available for download separately. Nortel Networks has released security advisory 2005005512-2 acknowledging this issue. Please the referenced advisory for further information.

Credits

Discovery is credited to Anna Hollingzworth.
Copyright © Symantec Corporation.
Permission to redistribute this alert electronically is granted as long as it is not edited in any way unless authorized by Symantec Security Response. Reprinting the whole or part of this alert in any medium other than electronically requires permission from secure@symantec.com.

Disclaimer
The information in the advisory is believed to be accurate at the time of publishing based on currently available information. Use of the information constitutes acceptance for use in an AS IS condition. There are no warranties with regard to this information. Neither the author nor the publisher accepts any liability for any direct, indirect, or consequential loss or damage arising from use of, or reliance on, this information.
Symantec, Symantec products, Symantec Security Response, and secure@symantec.com are registered trademarks of Symantec Corp. and/or affiliated companies in the United States and other countries. All other registered and unregistered trademarks represented in this document are the sole property of their respective companies/owners.

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