Microsoft Outlook Express MHTML URL allows execution of code

outlook-mhtml-execute-code (15705) The risk level is classified as HighHigh Risk


Microsoft Outlook Express versions 5.5, 6.0, 6.0SP1, and 6.0 on Windows Server 2003 could allow a remote attacker to execute arbitrary code on the system, caused by a vulnerability when parsing MHTML files. MHTML is the defining standard for MIME (Multipurpose Internet Mail Extensions) structures used to send HTML content in the body of email messages. A remote attacker could create a specially-crafted MHTML URL containing a reference to a local file that does not exist, which would allow the attacker to execute arbitrary code in the Local Machine zone of an affected system. An attacker could exploit this vulnerability by hosting the malicious Web page on a Web site or by sending it to a victim as an HTML email. After the victim has visited the malicious Web page or viewed the email, the attacker could gain unauthorized access to files and execute arbitrary code on the victim's system with the user's privileges.


Gain Access


Apply the appropriate patch for your system, as listed in the latest Microsoft Security Bulletin. See References.

— OR —

Use Microsoft Automatic Update if it is supported by your operating system. The original bulletin issued by Microsoft has been superseded.


Platforms Affected:

  • Microsoft Outlook Express 5.0
  • Microsoft Outlook Express 6.0 SP1
  • Microsoft Outlook Express 6.0
  • Microsoft Windows 2003 Server


Apr 13, 2004

The information within this database may change without notice. Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. In no event shall the author/distributor (IBM Internet Security Systems X-Force) be held liable for any damages whatsoever arising out of or in connection with the use or spread of this information.

For corrections or additions please email ignore thisxforceignore this@ignore thisus.ignore thisibm.comignore this

Return to the main page