Web Application Security and Search Engines – Beyond Google Hac.pptVIP

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2018-06-21 发布于河南
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Web Application Security and Search Engines – Beyond Google Hac.ppt

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Web Application Security and Search Engines – Beyond Google Hac

Demo – Automated Google Hacking Google Worms Concept first analyzed in March 2004 ADC paper: “Web Application Worms: Myth or Reality?” First actual exploit - Santy Worm, December 2004 What is a Google Worm Normal worms randomly draw IP addresses and hope for the best. Large foot print Infection is almost impossible for non-standard deployments Google Worms search Google for the first batch of vulnerable sites, infect them and instruct the infected machines to go for a different batch each. Small foot print Infection guaranteed regardless of deployment differences Google Worms Recent Incidents January 2008 First massive incident combining SQL Injection and HTML Injection Tens of thousands of sites affected (including CA’s site) April 2008 Huge number of MS SQL Server based sites injected with HTML IFRAME through SQL Injection Infection code introduces an IFRAME to each field in the database. Number of infected hosts and their uniformity suggest an infection engine based on Google Hacking May 2008! Mitigation StrategiesGoogle Hacking Actively Search Google (or any other search engine) for leakage Difficult to use a tool like GoolagScan. Google’s anti-automation measures do affect application owners trying to defend themselves. Requires a custom engine with relatively slow rate, and a database that is always up-to-date with latest Google Dorks. Demo – Anti Google Hacking Malware Distribution Search Engines How can search engines be used to distribute malware, or other attack vectors? Infect a page on the web Make sure that the page is ranked high for popular search terms Google study concluded that about 1.3% of search queries returned at least one malicious URL result How can I ensure that the infected page is ranked high for popular search terms? Aha! Malware Distribution Search Engines The example is taken from a recent attack who took place on March 2008 and described by researcher Dancho Danchev Results from major web sites rank high in search engines. M