Buffer Overrun in ListBox & ComboBox Control

By Thomas McGuire on October 16, 2003, 10:07 AM
Affected Software:
Microsoft Windows NT 4.0
Microsoft Windows NT Server 4.0, Terminal Server Edition
Microsoft Windows 2000
Microsoft Windows XP
Microsoft Windows Server 2003

A vulnerability exists because the ListBox control & the ComboBox control both call a function, which is located in the User32.dll file, that contains a buffer overrun. The function does not correctly validate the parameters that are sent from a specially-crafted Windows message. Windows messages provide a way for interactive processes to react to user events (for example, keystrokes or mouse movements) & to communicate with other interactive processes. A security vulnerability exists because the function that provides the list of accessibility options to the user does not correctly validate Windows messages that are sent to it.

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