Adobe Acrobat PDF buffer overflow

adobe-acrobat-pdf-bo (3318) The risk level is classified as MediumMedium Risk


Adobe Acrobat Viewer is vulnerable to a buffer overflow in the PDF ActiveX control (pdf.ocs). This ActiveX control is marked 'Safe for Scripting' in Internet Explorer. An attacker can overflow the pdf.ocx ActiveX control and execute arbitrary commands on the system running Adobe Acrobat Viewer and Internet Explorer.




Upgrade to the latest version of Adobe Acrobat (5.0.5 or later), available from the Adobe Acrobat Web site. See References.

As a workaround, modify a registry key for this ActiveX control to prevent it from being called or executed from Internet Explorer. Change the data value of the "Compatibility Flags" value to "00000400" in the following Registry Key:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\ActiveX Compatibility\{CA8A9780-280D-11CF-A24D-444553540000}


Platforms Affected:

  • Adobe Acrobat Reader 4.0
  • Microsoft Internet Explorer 4.0
  • Microsoft Internet Explorer 4.0.1 SP2
  • Microsoft Internet Explorer 4.0.1
  • Microsoft Internet Explorer 4.0.1 SP1


Sep 27, 1999

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.

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