Some good explanations were dicussed on www-mobile-code list recently I think. http://www.securityfocus.com/templates/archive.pike?start=2001-08-12&end=2001-08-18&list=107&threads=0& I am not too familiar with Cold Fusion, however, if you run ASP (Active Server Page) Applications on your IIS Server, the server issues a Session ID to each new session. This is how ASP maintains state across web pages. I assume it's the same concept for ColdFusion. This is an Automatic process for ID generation that I rather random ... so theoretically (as MS always likes to put it) yes, they could steal a Session ID, but you would have to guess it first, and that would be akin to attempting to hijack a TCP/IP session using a guessed TCP/IP sequence number. John Hicks -----Original Message----- From: Lincoln Yeoh [mailto:lyeohat_private] Sent: Thursday, August 30, 2001 1:35 AM To: Jeff Jancula; vuln-devat_private Subject: Re: Web session tracking security prob. Vulnerable: IIS and ColdFusion (maybe others) At 02:25 PM 29-08-2001 -0400, Jeff Jancula wrote: >BACKGROUND: > >When a Internet browser user visits IIS or ColdFusion hosted web sites, the web server issues browser commands similar to: > >(for IIS) Set-Cookie: ASPSESSIONID=BBBBBBBBABCDEFGHIJKLMNOP >(for CF) Set-Cookie: CFID=123 >(for CF) Set-Cookie: CFTOKEN=4567890 > >The browser stores and returns the "ASPSESSIONID" or "CFID/CFTOKEN" >values with each subsequent request to the web server. IIS and ColdFusion use these values to identify and track each user. > What does CFID=123 mean to cold fusion? Is that the user/session ID? Does that mean an attacker can just send CFID=123 and CFTOKEN=ANYTHING and Cold Fusion will think it's the same user/session? If it does then it's a very big problem. If it doesn't, then it may not be a problem unless your application assumes that just having a session means it's a valid user. Cheerio, Link. __________________________________________________ FREE voicemail, email, and fax...all in one place. Sign Up Now! http://www.onebox.com
This archive was generated by hypermail 2b30 : Thu Aug 30 2001 - 10:09:19 PDT