acroread5 -- mailListIsPdf() buffer overflow vulnerability

An iDEFENSE Security Advisory reports:

Remote exploitation of a buffer overflow in version 5.09
of Adobe Acrobat Reader for Unix could allow for execution
of arbitrary code.
The vulnerability specifically exists in a the function
mailListIsPdf(). This function checks if the input file
is an email message containing a PDF. It unsafely copies
user supplied data using strcat into a fixed sized
buffer.