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Microsoft Windows PostMessage API Unmasked Password Weakness

A weakness has been reported in the Microsoft Windows PostMessage API which could effectively allow unmasked passwords to be copied into a user's clipboard or other buffer. From this point, a further attack would be required to steal password credentials.

This weakness occurs because the PostMessage API may be used in combination with EM_SETPASSWORDCHAR messages. This may occur from another process that does not belong to the process thread.







 

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