Sorry - I haven't. I'm working with MSRC to narrow down the definitions and automation for the ISA 2004 blocker. ------------------------------------------------------- Jim Harrison MCP(NT4, W2K), A+, Network+, PCG http://isaserver.org/Jim_Harrison/ http://isatools.org Read the help / books / articles! ------------------------------------------------------- -----Original Message----- From: Thor (Hammer of God) [mailto:thor@xxxxxxxxxxxxxxx] Sent: Wednesday, January 04, 2006 11:45 To: [ISAserver.org Discussion List] Subject: [isalist] RE: WMF Vunrability http://www.ISAserver.org Jim, did you read this? I'm wondering if the method described to "block extensions" is correct or not. Rather than using "Configure HTTP" and setting allowable extensions, I though one should explicitly create a deny rule specifying both the .wmf extension *as well* as application/x-msmetafile as the MIME type. Incoming HTTP file associations are handled by MIME type, not file extension. Only when there is no MIME type handed down by the server is a file extension used (or when you do an actual file transfer, like with FTP.) Comments on that? t ----- "I may disapprove of what you say, but I will defend to the death your right to say it." ----- Original Message ----- From: "Stefaan Pouseele" <stefaan.pouseele@xxxxxxxxx> To: "[ISAserver.org Discussion List]" <isalist@xxxxxxxxxxxxx> Sent: Wednesday, January 04, 2006 11:24 AM Subject: [isalist] RE: WMF Vunrability > http://www.ISAserver.org > > Hey guys, > > Check out > http://blogs.technet.com/jesper_johansson/archive/2006/01/02/416762.aspx > too > ;-) > > HTH, > Stefaan > > -----Original Message----- > From: Thomas W Shinder [mailto:tshinder@xxxxxxxxxxx] > Sent: woensdag 4 januari 2006 20:16 > To: [ISAserver.org Discussion List] > Subject: [isalist] RE: WMF Vunrability > > http://www.ISAserver.org > > Hi Tim, > > I agree. There seems to be than the ususal amount of FUD associated with > this problem. :( > > Tom > > Thomas W Shinder, M.D. > Site: www.isaserver.org > Blog: http://spaces.msn.com/members/drisa/ > Book: http://tinyurl.com/3xqb7 > MVP -- ISA Firewalls > **Who is John Galt?** > > > >> -----Original Message----- >> From: Thor (Hammer of God) [mailto:thor@xxxxxxxxxxxxxxx] >> Sent: Wednesday, January 04, 2006 1:01 PM >> To: [ISAserver.org Discussion List] >> Subject: [isalist] RE: WMF Vunrability >> >> http://www.ISAserver.org >> >> I wouldn't call it "program like behavior." They just contain both >> metadata and rendering data in the same file (as I understand it.) >> >> Renaming the file to something like ".gif" or ".jpg" could still cause >> execution if loaded from a file, but only if the Picture and Fax >> Viewer was the default program for those file types. From a browser, >> for WP&FV to open it and parse the data, it has to be that MIME type >> (again, as I understand >> it.) >> >> While I've read here that the "way to do it" is how GFI does it, I've >> still not seen any information on why simple content filtering won't >> work. But then again, I read where Jim is working with MSRC to come >> up with a "workable" filter. It would be nice to get some >> authoritative, detailed information on why MIME and file type >> filtering *won't* work. >> >> t >> >> >> ----- >> "I may disapprove of what you say, >> but I will defend to the death your >> right to say it." >> >> >> ----- Original Message ----- >> From: "Thomas W Shinder" <tshinder@xxxxxxxxxxx> >> To: "[ISAserver.org Discussion List]" <isalist@xxxxxxxxxxxxx> >> Sent: Wednesday, January 04, 2006 10:31 AM >> Subject: [isalist] RE: WMF Vunrability >> >> >> http://www.ISAserver.org >> >> Hi Tim, >> >> Don't know about that, but it's a good question. But I have to wonder >> about other apps that open the WMF files. FWIU, WMF files have some >> program like behavior that allow it to call other programs if >> something doesn't work. >> >> How's that as a erudite description for a process? :) >> >> Tom >> >> Thomas W Shinder, M.D. >> Site: www.isaserver.org >> Blog: http://spaces.msn.com/members/drisa/ >> Book: http://tinyurl.com/3xqb7 >> MVP -- ISA Firewalls >> **Who is John Galt?** >> >> >> >> > -----Original Message----- >> > From: Thor (Hammer of God) [mailto:thor@xxxxxxxxxxxxxxx] >> > Sent: Wednesday, January 04, 2006 12:13 PM >> > To: [ISAserver.org Discussion List] >> > Subject: [isalist] RE: WMF Vunrability >> > >> > http://www.ISAserver.org >> > >> > But if he sets a differnt mime type, Fax Viewer won't open the >> > program, right? >> > >> > t >> > ----- >> > "I may disapprove of what you say, >> > but I will defend to the death your >> > right to say it." >> > >> > >> > ----- Original Message ----- >> > From: "Thomas W Shinder" <tshinder@xxxxxxxxxxx> >> > To: "[ISAserver.org Discussion List]" <isalist@xxxxxxxxxxxxx> >> > Sent: Wednesday, January 04, 2006 9:32 AM >> > Subject: [isalist] RE: WMF Vunrability >> > >> > >> > http://www.ISAserver.org >> > >> > Hi Jonathon, >> > >> > That won't work, because the scumbag can use any file name he wants. >> > Same goes with the MIME type. The MIME type is set at the Web >> > server, so the scumbag can associate any MIME type he wants. >> > >> > Tom >> > >> > Thomas W Shinder, M.D. >> > Site: www.isaserver.org >> > Blog: http://spaces.msn.com/members/drisa/ >> > Book: http://tinyurl.com/3xqb7 >> > MVP -- ISA Firewalls >> > **Who is John Galt?** >> > >> > >> > >> > > -----Original Message----- >> > > From: Jonathon J. Howey [mailto:Jonathon@xxxxxxx] >> > > Sent: Wednesday, January 04, 2006 11:25 AM >> > > To: [ISAserver.org Discussion List] >> > > Subject: [isalist] RE: WMF Vunrability >> > > >> > > http://www.ISAserver.org >> > > >> > > What I did to block it was: >> > > >> > > Internet Access Policy -> Protocols tab -> Filtering -> >> > Configure HTTP >> > > -> Extensions tab. Should be self explanatory from there. >> > > >> > > >> > > >> > > Jonathon J. Howey >> > > KPSA Compliance Management Inc. >> > > P 780.409.5620 >> > > F 780.409.5621 >> > > D 780.409.5628 >> > > C 780.965.8363 >> > > Jonathon@xxxxxxx >> > > >> > > Guiding the Future of Transportation www.KPSA.ca >> > > >> > > >> > > >> > > -----Original Message----- >> > > From: Jim Harrison [mailto:Jim@xxxxxxxxxxxx] >> > > Sent: January 4, 2006 10:12 AM >> > > To: [ISAserver.org Discussion List] >> > > Subject: [isalist] RE: WMF Vunrability >> > > >> > > http://www.ISAserver.org >> > > >> > > He never stated what his "block" was. >> > > >> > > >> > > ------------------------------------------------------- >> > > Jim Harrison >> > > MCP(NT4, W2K), A+, Network+, PCG >> > > http://isaserver.org/Jim_Harrison/ >> > > http://isatools.org >> > > Read the help / books / articles! >> > > ------------------------------------------------------- >> > > >> > > >> > > -----Original Message----- >> > > From: Brian Boyes [mailto:BrianB@xxxxxxxxx] >> > > Sent: Wednesday, January 04, 2006 09:02 >> > > To: [ISAserver.org Discussion List] >> > > Subject: [isalist] RE: WMF Vunrability >> > > >> > > http://www.ISAserver.org >> > > >> > > > I have installed the "wmf" block to my ISA 2004 clients but >> > > I not sure >> > > >> > > > how to set this up for ISA 2000. >> > > > Could someone provide advice of the best way to do this. >> > > >> > > Did anyone ever post an answer? I'm curious about this >> "wmf block". >> > > >> > > Brian >> > > > > > ------------------------------------------------------ > List Archives: http://www.webelists.com/cgi/lyris.pl?enter=isalist > ISA Server Newsletter: http://www.isaserver.org/pages/newsletter.asp > ISA Server FAQ: http://www.isaserver.org/pages/larticle.asp?type=FAQ > ------------------------------------------------------ > Visit TechGenix.com for more information about our other sites: > http://www.techgenix.com > ------------------------------------------------------ > You are currently subscribed to this ISAserver.org Discussion List as: > thor@xxxxxxxxxxxxxxx > To unsubscribe visit http://www.webelists.com/cgi/lyris.pl?enter=isalist > Report abuse to listadmin@xxxxxxxxxxxxx > > ------------------------------------------------------ List Archives: http://www.webelists.com/cgi/lyris.pl?enter=isalist ISA Server Newsletter: http://www.isaserver.org/pages/newsletter.asp ISA Server FAQ: http://www.isaserver.org/pages/larticle.asp?type=FAQ ------------------------------------------------------ Visit TechGenix.com for more information about our other sites: http://www.techgenix.com ------------------------------------------------------ You are currently subscribed to this ISAserver.org Discussion List as: jim@xxxxxxxxxxxx To unsubscribe visit http://www.webelists.com/cgi/lyris.pl?enter=isalist Report abuse to listadmin@xxxxxxxxxxxxx All mail to and from this domain is GFI-scanned.