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  3. Microsoft Outlook VEVENT Record Remote Code Execution Vulnerability

Microsoft Outlook VEVENT Record Remote Code Execution Vulnerability

Risk

High

Date Discovered

January 9, 2007

Description

Microsoft Outlook is prone to a remote code-execution vulnerability because the application fails to properly handle malformed iCal requests. A remote attacker can exploit this issue to execute arbitrary code with the privileges of unsuspecting users. A successful exploit may aid in the remote compromise of the underlying computer.

Technologies Affected

  • Microsoft Office 2000
  • Microsoft Office 2000 SP1
  • Microsoft Office 2000 SP2
  • Microsoft Office 2000 SP3
  • Microsoft Office 2003
  • Microsoft Office 2003 SP1
  • Microsoft Office 2003 SP2
  • Microsoft Office XP
  • Microsoft Office XP SP1
  • Microsoft Office XP SP2
  • Microsoft Office XP SP3
  • Microsoft Outlook 2000
  • Microsoft Outlook 2000 SP2
  • Microsoft Outlook 2000 SR1
  • Microsoft Outlook 2000 SP3
  • Microsoft Outlook 2002
  • Microsoft Outlook 2002 SP1
  • Microsoft Outlook 2002 SP2
  • Microsoft Outlook 2002 SP3
  • Microsoft Outlook 2003
  • Microsoft Outlook 2003 SP2

Recommendations

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

Running the affected Outlook client as a user with least privileges possible may help mitigate the impact of a successful attack.

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

Deploy NIDS to monitor network traffic for signs of anomalous or suspicious activity. Monitor logs regularly for any signs of unusual activity, such as repeated crashes.

Implement multiple redundant layers of security.

Memory-protection schemes (such as non-executable stack/heap configurations and randomly mapped memory segments) may complicate the successful exploit of memory-corruption vulnerabilities.

Do not open email messages from unknown or untrusted individuals.

Users should never trust incoming email messages originating from unknown or untrusted sources.
Microsoft has released an advisory and fixes to address this issue. Please see the references for more information.

Credits

Lurene Grenier of Sourcefire reported this issue to the vendor.
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.
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