http://www.techworld.com/security/news/index.cfm?newsID=9240 By Matthew Broersma Techworld 21 June 2007 Hackers have begun circulating a PHP exploit embedding it in a seemingly harmless GIF image, according to security researchers. The exploit was discovered in at least one GIF on a major image-hosting website, according to a bulletin [1] from the SANS Institute's Internet Storm Center (ISC) on Tuesday. "It's interesting and scary to find a file that acts like a regular GIF file, but contains a script exploit," said SANS ISC handler Lorna Hutcheson in the bulletin. The exploit, coded in PHP script, could be a dangerous new development, Hutcheson said. "Interestingly enough, the file itself contains a completely legitimate 1x1 gif image at the beginning of the file," she wrote. "It is a clever way to pass exploit code to others without it setting off alarms or attracting attention all while bypassing network security tools." She also suggested the technique could be used to create a Remote File Inclusion attack, an attack that lets hackers run their own malicious code on an otherwise harmless website. [1] http://isc2.sans.org/diary.html?storyid=2997 _____________________________________________________ Attend Black Hat USA, July 28-August 2 in Las Vegas, the world's premier technical event for ICT security experts. Featuring 30 hands-on training courses and 90 Briefings presentations with lots of new content and new tools. Network with 4,000 delegates from 70 nations. Visit product displays by 30 top sponsors in a relaxed setting. Rates increase on June 1 so register today. http://www.blackhat.com
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