Microsoft IE 5.2.3 is the last IE browser released for Mac OSX. IE 5.2.3 contain a vulnerability that allow a remote attacker to crash the browser an potetially remote code execution. A remote attacker could setup a malicious site and entice a victim to visit it triggering the buffer overflow. Exploit tested on Tiger and Panther. Sample of POC (save on file and open with IE to test locally) ------------------------------------------------------------------------ --------- Begin code------ End of code------- Apple Crash Report --------------------------- OS Version: 10.4.2 (Build 8C46) Report Version: 3 Command: Internet Explorer Path: /Applications/Internet Explorer.app/Contents/MacOS/Internet Explorer Parent: WindowServer [65] Version: 5.2.3 (5.2.3) Build Version: 30 Project Name: MicrosoftIE5 Source Version: 58150100 PID: 854 Thread: 7 Exception: EXC_BAD_ACCESS (0x0001) Codes: KERN_PROTECTION_FAILURE (0x0002) at 0x000002e4 Thread 0: 0 libSystem.B.dylib 0x9000a778 mach_msg_trap + 8 1 libSystem.B.dylib 0x9000a6bc mach_msg + 60 2 ...ple.CoreServices.CarbonCore 0x90b661e4 SwitchContexts + 96 3 ...ple.CoreServices.CarbonCore 0x90b5be90 YieldToThread + 372 ..... snip---- Regards, Marco -------------------------------------------------------------------- CONFIDENTIALITY NOTICE This message and its attachments are addressed solely to the persons above and may contain confidential information. If you have received the message in error, be informed that any use of the content hereof is prohibited. Please return it immediately to the sender and delete the message. Should you have any questions, please contact us by replying to webmaster_at_telecomitalia.it. Thank you www.telecomitalia.it