Full Disclosure mailing list archives
Re: Session data pollution vulnerabilities inweb applications
From: "Dave Korn" <davek_throwaway () hotmail com>
Date: Thu, 12 Jan 2006 19:18:18 -0000
Frank Knobbe wrote in news:1137084647.25372.13.camel@localhost
These type of bugs stem from bad program design. (BTW: I wouldn't call it session data pollution... your not polluting anything).
Yes he is. He's polluting sanitized data with tainted data. It's a fairly reasonable description if you ask me.
The proposed fix is -- besides being only specific to this example -- equally flawed. The underlying issue is that you trust user supplied data.
NO! You've /completely/ failed to understand the post. The underlying issue is not that the user-supplied data is trusted, because it isn't, it gets validated. The _underlying_ issue is that the *same* location is used to store both trusted and non-trusted data, and there's no way for the application to know which kind of data was last stored in that location. cheers, DaveK -- Can't think of a witty .sigline today.... _______________________________________________ Full-Disclosure - We believe in it. Charter: http://lists.grok.org.uk/full-disclosure-charter.html Hosted and sponsored by Secunia - http://secunia.com/
Current thread:
- Session data pollution vulnerabilities in web applications Alla Bezroutchko (Jan 12)
- Re: Session data pollution vulnerabilities in web applications Frank Knobbe (Jan 12)
- Re: Session data pollution vulnerabilities inweb applications Dave Korn (Jan 12)
- Re: Re: Session data pollution vulnerabilities inweb applications Frank Knobbe (Jan 12)
- Re: Session data pollution vulnerabilities in web applications Alla Bezroutchko (Jan 13)
- Re: Session data pollution vulnerabilities in web applications Yvan Boily (Jan 13)
- Re: Session data pollution vulnerabilities in web applications Frank Knobbe (Jan 13)
- Re: Session data pollution vulnerabilities inweb applications Dave Korn (Jan 12)
- RE: Session data pollution vulnerabilities in web applications Keenan Smith (Jan 16)
- <Possible follow-ups>
- Re: Session data pollution vulnerabilities in web applications mailinglist mailinglist (Jan 12)
- Re: Session data pollution vulnerabilities in web applications Frank Knobbe (Jan 12)