From Aut Disce, Aut Discede:

Consider for a moment the state of client-side bugs 5 or 6 years ago. Attacks such as this, a multi-stage miscellany of IE and Mediaplayer bugs that resulted in the “silent delivery and installation of an executable on the target computer, no client input other than viewing a web page” were reported with regularity. Gradually these type of attack gave way to exploitation of direct browser implementation flaws such as the IFRAME overflow and DHTML memory corruption flaws. So what has become of the multi-stage attacks - have they become redundant? The answer to this, which I’m sure you can guess, is a resounding “no” and will be emphatically demonstrated in my upcoming Black Hat talk “The Internet is Broken: Beyond Document.Cookie - Extreme Client Side Exploitation”, a joint double session presentation co-presented by Billy Rios, Nate McFeters and Rob Carter.

As a teaser for that, I’m going to revisit an old attack - pre-computed dictionary attacks on NTLM - and discuss how we can steal domain credentials from the Internet with a bit of help from Java. I’m going to split it into two posts. In this post we’ll apply the attack to Windows XP (a fully patched SP3 with IE7). In my next post we’ll consider its impact on Windows Vista.

For the full article read on.

Why are you still here? Go read it.

Article Link

Attackers insert SCRIPT and IFRAME tags into the content of trusted, legitimate web sites via a known SQL injection attack. Those tags redirect the user to the attacker’s server which hosts the Flash exploit. Tens of thousands of web sites are vulnerable to the SQL injection attack, meaning the distribution potential is high.

The vulnerability is not “zero-day”; however, these are the first known public exploits targeting it. The SecureWorks Counter Threat Unit (CTU) has analyzed 18 variants of the exploit, and all attempt to leverage the integer overflow vulnerability originally discovered by Mark Dowd (CVE-2007-0071), which was patched by Adobe with release of version 9.0.124.0 of the Flash Player. While some have reported that the latest version is vulnerable, the CTU was unable to duplicate these results with samples taken from known exploit sites. The only confirmed vulnerable version is (pre-patch) 9.0.115.0.