"Writing JIT-Spray Shellcode for fun and profit" by Alexey Sintsov from DSecRG (dsecrg.com) Attacks on clients’ browsers have always been the real threat for everyone. And here vulnerabilities have been not only in the browser but also in plug-ins. Bank-clients, business software, antivirus software – all of them use ActiveX (for IE) for clients and here have been and are still many vulnerabilities. Vendors make steps to defend us from it. Software vendors patch vulnerabilities and OS vendors use new mechanisms to prevent attacks at all. But security researchers are trying to find way to bypass these mechanisms. The new versions of browsers (Internet Explorer 8 and FireFox 3.5) use permanent DEP. And the new versions of OS use the ASLR mechanism. All this makes the old methods of attacks impossible. But on BlackHat DC 2010 the interesting way to bypass DEP and ASLR in browsers (not only) and Just-In-Time compilers was presented. This method is called JIT-SPRAY. But here was no one public PoC until now. In this text we are describe how to write a shellcode for new JIT-Spray attacks and make universal STAGE 0 shellcode that gives control to any common shellcode from MetaSploit, for example. http://www.dsecrg.com/files/pub/pdf/Writing%20JIT-Spray%20Shellcode%20for%20fun%20and%20profit.pdf As we give much attention on ERP and Business applications security you can also download new exploits for popular client side Business applications such as SAP GUI and Oracle Document Capture that use JIT-Spray Shellcode. SAP GUI 7.10 WebViewer3D ActiveX - JIT-Spray Exploit http://dsecrg.com/files/exploits/SAP-Logon7-System.zip Oracle Document Capture (EasyMail Objects EMSMTP.DLL 6.0.1) ActiveX Control BOF - JIT-Spray Exploit http://dsecrg.com/files/exploits/QuikSoft-reverse.zip Alexey Sintsov Digital Security Research Group ______________________ DIGITAL SECURITY phone: +7 812 703 1547 +7 812 430 9130 e-mail: research@xxxxxxxxxx www.dsec.ru www.dsecrg.com www.pcidss.ru ----------------------------------- This message and any attachment are confidential and may be privileged or otherwise protected from disclosure. If you are not the intended recipient any use, distribution, copying or disclosure is strictly prohibited. If you have received this message in error, please notify the sender immediately either by telephone or by e-mail and delete this message and any attachment from your system. Correspondence via e-mail is for information purposes only. Digital Security neither makes nor accepts legally binding statements by e-mail unless otherwise agreed. -----------------------------------
