Published:2008/03/07  Last Updated:2008/05/21

BFup ActiveX Control buffer overflow vulnerability


BFup ActiveX Control contains a buffer overflow vulnerability.

Products Affected

  • BFup ActiveX Control 1.0.308.19 and earlier


BFup ActiveX Control is developed by an individual that provides file upload and download functionality. BFup ActiveX Control contains a buffer overflow vulnerability.

According to the developer of BFup ActiveX Control, this vulnerability only exists in BFup ActiveX Control developed by the individual developer, not in its commercial version, BFup Pro ActiveX Control, provided by B21Soft, Inc. For more information, refer to the developer's website.


If a user views a specially crafted web page when BFup ActiveX Control is enabled, a buffer overflow could occur and allow a remote attacker to execute arbitrary code with the privilege of the user who is using the web browser.


Update the Software
Update to the latest version according to the information provided by the developer.

Vendor Status


JPCERT/CC Addendum

Vulnerability Analysis by JPCERT/CC

Analyzed on 2008.03.07

Measures Conditions Severity
Access Required Routed - can be attacked over the Internet using packets
  • High
Authentication None - anonymous or no authentication (IP addresses do not count)
  • High
User Interaction Required Simple - the user must be convinced to take a standard action that does not feel harmful to most users, such as click on a link or view a file
  • Medium
Exploit Complexity Low-Medium - some expertise and/or luck required (most buffer overflows, guessing correctly in small space, expertise in Windows function calls)
  • Medium-High

Description of each analysis measures


Daiki Fukumori of Secure Sky Technology, Inc. reported this vulnerability to IPA.
JPCERT/CC coordinated with the vendors under Information Security Early Warning Partnership.

Other Information

JPCERT Reports
CERT Advisory
CPNI Advisory
JVN iPedia JVNDB-2008-000015

Update History