Multiple Heap Overflows in FTP Desktop Introduction: ============= "FTP Desktop lets you access FTP sites as if they were folders on your computer. Now you can move your files between your hard disk and remote FTP sites with greater ease." - Vendors Description [ http://www.ftpdesktop.com ] Note: FTP Desktop is fully integrated into Windows Explorer, so the actual module at fault appears as 'explorer.exe'. Details: ======== Vulnerable systems: FTP Desktop version 3.5 (and possibly earlier versions). Vulnerability: It is possible to cause a Heap overflow in FTP Desktop, allowing total modification of the EIP pointer - this can be maliciously altered to allow remote arbitrary code execution. The overflow occurs in the FTP banner and others areas as it shown here: FTP Banner: ----------- (FTP Desktop connected...) PADDING EBP EIP 220 [229xA][4xB][4xX] (Access violation when executing 0x58585858) // 4xX Username: --------- (FTP Desktop Sends 'USER username') PADDING EBP EIP 331 [229xA][4xB][4xX] (Access violation when executing 0x58585858) // 4xX Password: --------- (FTP Desktop Sends 'PASS password') PADDING EBP EIP 331 [229xA][4xB][4xX] (Access violation when executing 0x58585858) // 4xX Vendor status: ============== The vendor has been informed, and they are fixing this bug. The updated version, when released, can be downloaded from: http://www.ftpdesktop.net/download.html [ http://www.ftpdesktop.net/download/ftpsetup.exe ] Exploit: ======== http://www.elitehaven.net/ftpdesktop.zip (I would thank Peter Winter-Smith for helping me in the exploitation) Discovered by/Credit: ===================== Bahaa Naamneh b_naamneh@hotmail.com
