Full Disclosure mailing list archives
Insecure http pages referencing https form-actions.
From: fd () ew nsci us
Date: Tue, 9 Aug 2005 16:12:52 -0700 (PDT)
Today I realized that many "secured" web sites reference their secure login page from an insecure page. For example: http://www.some-luser.com/login.html: <form action="https://cgi.some-luser.com/login-cgi"> user: <input name=user> pass: <input name=pass> </form> The actual post is secure (several assumptions made), but not the page which contains the form itself! In my mind, it would be rather trivial to man-in-the-middle or DNS poison www.some-luser.com and change the content of login.html's form-action to http://not-secure-luser.com/login-cgi. If Eve hosts not-secure-luser.com then login credentials will be posted to her rather than to where it is expected. With some javascript magic, Eve could even post the victim back into https://cgi.some-luser.com/login-cgi. Except for the extra delay and perhaps a "please wait while you are logged in" page (ajax anyone?), Bob *and* Alice would never know. Am I missing something here? Are "secure" web designers really overlooking the obvious? -Eric -- Eric Wheeler Vice President National Security Concepts, Inc. PO Box 3567 Tualatin, OR 97062 http://www.nsci.us/ Voice: (503) 293-7656 Fax: (503) 885-0770 -- Here's a topic: foo. Discuss amongst yourselves ... _______________________________________________ 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:
- Insecure http pages referencing https form-actions. fd (Aug 09)
- Re: Insecure http pages referencing https form-actions. Nick FitzGerald (Aug 09)
- Re: Insecure http pages referencing https form-actions. fd (Aug 09)
- Re: Insecure http pages referencing https Jeff Kell (Aug 09)
- Re: Insecure http pages referencing https form-actions. fd (Aug 09)
- Message not available
- Re: Insecure http pages referencing https form-actions. fd () ew nsci us (Aug 09)
- Message not available
- Re: Insecure http pages referencing https form-actions. fd () ew nsci us (Aug 10)
- Re: Insecure http pages referencing https form-actions. fd () ew nsci us (Aug 09)
- Re: Insecure http pages referencing https form-actions. Nick FitzGerald (Aug 09)
- RE: Insecure http pages referencing httpsform-actions. Aditya Deshmukh (Aug 09)
- Re: Insecure http pages referencing https form-actions. Leandro Meiners (Aug 10)