Building on my Eudora attachment spoof http://www.securityfocus.com/archive/1/322286 I notice that sending a filename with many dots crashes Eudora, e.g. From: me To: you Attachment Converted<CR>: "\B.A.A.A ... .A.A.A" (with 122 repetitions of ".A") make it crash, writing an Exception.log file. (Fewer repetitions cause no problem; more cause Eudora to crash, without even an Exception.log.) Eudora is then unable to start, until the offending message is removed from In.mbx (using some utility other than Eudora itself). I do not know if this buffer overflow is exploitable: Exception.log says Exception code: c0000005 ACCESS_VIOLATION Fault address: 77e873bc 01:000063bc C:\WINNT\system32\KERNEL32.DLL Registers: EAX:ffffffff EBX:00000000 ECX:00412e35 ... (only ECX seems controllable). (Tested with Eudora 5.2.1 on Windows 2000.) Cheers, Paul Szabo - psz@maths.usyd.edu.au http://www.maths.usyd.edu.au:8000/u/psz/ School of Mathematics and Statistics University of Sydney 2006 Australia
