Full Disclosure mailing list archives
Re: Session Hijack Vulnerabilty on ebays german want ad?
From: Michael Brown <michael () supermathie net>
Date: Sat, 28 Jun 2014 01:34:36 -0400
Sounds like you want an option similar to what many websites (Google comes to mind) have: an option to revoke any other sessions except "this one" for your user. Without such an option, there's nothing you can practically do in the general case if the website allows more than one session. M. Original Message From: Christian K. Sent: Friday, June 27, 2014 23:00 To: fulldisclosure () seclists org Subject: Re: [FD] Session Hijack Vulnerabilty on ebays german want ad? Hi rob, I tried what you said and it does not affect the other session. The open session stays open and is not invalidated. @all others: Thanks for all the helpful explanations; For me this is clear now and I reported this issue. Regards, Christian 2014-06-24 22:03 GMT+02:00 R D <rd.seclists () gmail com>:
Hi all, Yes Christian, this might be a security vulnerability, but it's an edge case. To me, the problem here is the difference between the user expectation and what really happens. A clear case of a similar vuln is when you log out of a website and what the website actually does is just deleting the cookies on your browser, but not invalidating the session Id server-side (so the session is still valid for any attacker holding onto the cookie). In your case, you click the "forgot password" button. One might say you have no expectation of this killing any other session you might have on the application. But in reality, the password reset function might be used in the case of a (suspected) account compromise; either you cannot login because an attacker has changed your password, or you can't be bothered to log in to change your password but you suspect someone might have gained access to your account. In both cases this is clearly not the intended behaviour as the attacker remains in control of your account. You might want to try changing your password while logged in and see if when the password is changed this way, the other sessions are invalidated. Regards, --rob' On Mon, Jun 23, 2014 at 9:39 PM, uname -a <sec.list () gmx net> wrote:Yes it is a vector. Imagin the following: you go to a "friend". there you log in to your site. before you leave, you forgotten to logout. at home you change your password. but your friend can still use your account. greetings Am 23.06.2014 20:21, schrieb Christian K.:Hi, i have a question if this is an attack vector (website is german wantadbranch from ebay kleinanzeigen.ebay.de prob. english site affectedtoo):On Computer A the browser (FF) has an open tab with the site where,whenvisited, user A is always signed on (because the specific site is theuserpanel). On Computer B user A wants to log into his account, but forgot his password. He successfully changed his password using the "forgotpassword"button and was able to log in. Then user A moves from Computer B to Computer A (which was off at thetimeuser A was at Computer B) and starts its browser where he realizes thatheis still logged into his account on the site without any password confirmation. As this happend to me, the question is: is this an attack vector (Iassumeit is) and how can I as a user protect myself? Am not really intosecurityengineering (just non-sec-related software engineering...), so forgivemydumbness! Thanks. C. _______________________________________________ Sent through the Full Disclosure mailing list http://nmap.org/mailman/listinfo/fulldisclosure Web Archives & RSS: http://seclists.org/fulldisclosure/_______________________________________________ Sent through the Full Disclosure mailing list http://nmap.org/mailman/listinfo/fulldisclosure Web Archives & RSS: http://seclists.org/fulldisclosure/_______________________________________________ Sent through the Full Disclosure mailing list http://nmap.org/mailman/listinfo/fulldisclosure Web Archives & RSS: http://seclists.org/fulldisclosure/
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Current thread:
- Session Hijack Vulnerabilty on ebays german want ad? Christian K. (Jun 23)
- Re: Session Hijack Vulnerabilty on ebays german want ad? Cengizhan.Yuecel (Jun 24)
- Re: Session Hijack Vulnerabilty on ebays german want ad? felsenkotzer (Jun 24)
- Re: Session Hijack Vulnerabilty on ebays german want ad? uname -a (Jun 24)
- Re: Session Hijack Vulnerabilty on ebays german want ad? R D (Jun 25)
- Re: Session Hijack Vulnerabilty on ebays german want ad? Christian K. (Jun 27)
- Re: Session Hijack Vulnerabilty on ebays german want ad? Michael Brown (Jun 28)
- Re: Session Hijack Vulnerabilty on ebays german want ad? R D (Jun 25)