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Schneier on SecurityA blog covering security and security technology. « Letter: Lexar JumpDrives | Main | Peer-to-Peer Alarm Systems » November 8, 2004Hacking FaxesPrisoner is freed from jail based on a forged fax: In West Memphis District Court yesterday, Tristian Wilson was set to appear on the docket for a bond hearing on the charges. When he did not appear, Judge William "Pal" Rainey inquired about his release and found that a jail staff member released Wilson by the authority of a fax sent to the jail late Saturday night. Faxes are fascinating. They're treated like original documents, but lack any of the authentication mechanisms that we've developed for original documents: letterheads, watermarks, signatures. Most of the time there's no problem, but sometimes you can exploit people's innate trust in faxes to good effect. Posted on November 8, 2004 at 7:12 AM • 16 Comments To receive these entries once a month by e-mail, sign up for the Crypto-Gram Newsletter. It's amazing how much the healthcare industry still relies upon faxes for distributing Protected Health Information (PHI). Not only is it a privacy issue, but could you imagine abuse of pharmaceuticals or medical procedures because of a social engineering attack? Yet, take away the fax today, and many healthcare organizations would be unable to conduct business. Posted by: malcomvetter at November 8, 2004 7:46 AM A similar story happenned last year in France. I guess it's a pretty common way to get prisonners out of jail... Posted by: Frédéric Grosshans at November 8, 2004 10:57 AM The article does in fact mention that the fax was missing the "standard letterhead with the WMPD logo on it". The fax header also apparently said it originated from a McDonalds. I don't know if I'd call that "trust"... Posted by: Davi Ottenheimer at November 8, 2004 11:39 AM Like that last comment said, the fax machine probably isn't the weak link here. It's not as if this is a new idea -- the most successful escape attempt from Alcatraz was based on forged release orders. Posted by: Joe Ganley at November 8, 2004 2:05 PM Mark one up for Social Engineering (SE) Attacks! - The human is the weakest link and is very vulnerable to things that shouldn't make sense! Israel Torres Posted by: Israel Torres at November 9, 2004 9:00 AM Setting aside for the moment the reasons that this fax (and the many release-papers forgeries that have preceded it) should have been recognized as a fake, I think that faxes in general are perceived as trustworthy because most people experience fax machines as closed systems, with neither directories to send to any arbitrary unauthorized destination nor arbitrarily-settable sender information. (That the experience is contrary to fact is a minor nit.) I was thinking about this the other day when I had to fax a legal document overseas. It would have been easier and cheaper to just email the scan to the recipient for printing, but that embedded timestamp and sender information added a veneer of authenticity that a printed PDF attachment couldn't match. As sender-address spoofing becomes even more common -- From: headers, caller-ID, fax headers -- when will people finally stop relying on the transmission infrastructure for (apparent) authentication? Posted by: Paul Wallich at November 9, 2004 11:06 AM I am consistantly amazed by the number of small businesses (especially law offices) where the FAX is the responsibility of the front- desk receptionist. FAXes come out and are stacked for pickup in the front- office waiting area. Anybody who walked in the door could look them over. Posted by: lightning at November 9, 2004 2:40 PM Wow. Even if they had had a system that included certain special official "marks" and such, allowing someone to be released simply with a fax seems, uh, not too bright. The same goes for (as a prior person has commented) the notion that 'the fax came from the right number'
Posted by: Background Investigations at November 11, 2004 11:48 AM hi hacking faxes i am logan known as scott engle. believe it! Posted by: logan E. at February 28, 2006 4:10 PM I would like to have some more information about fax hacking in general. Is it possible to enter a faxmachine by remote services ? Is it also possible to enter a faxnumber through hacking the protocal of the remote services from the faxmichine? Posted by: rick at May 1, 2006 4:26 AM Hello Rick, What do you exactly mean by "enter a faxmachine". Posted by: George at June 30, 2006 2:49 AM Another fine example of creativity and another demonstration that software is not a security solution, no matter how much of it you buy! Posted by: Secret Patrol at June 25, 2009 3:40 PM Hello. Posted by: Marco at January 1, 2010 10:40 AM Hello again. Thanks you. Posted by: Marco at January 1, 2010 10:48 AM My lawyer refuses to show fax he sent to Merrill lyNch. Same day 40 k. Trades were made onacct. Which was to be froze. For child support. I have cover sheet Can contents be recovered Posted by: Charlie at March 12, 2010 10:40 PM Just see this little demo... Posted by: a friend at March 16, 2010 6:13 PM Post a comment
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