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.l...@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 want ad > > branch from ebay kleinanzeigen.ebay.de prob. english site affected too): > > > > On Computer A the browser (FF) has an open tab with the site where, when > > visited, user A is always signed on (because the specific site is the > user > > panel). > > > > On Computer B user A wants to log into his account, but forgot his > > password. He successfully changed his password using the "forgot > password" > > button and was able to log in. > > > > Then user A moves from Computer B to Computer A (which was off at the > time > > user A was at Computer B) and starts its browser where he realizes that > he > > is 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 (I > assume > > it is) and how can I as a user protect myself? Am not really into > security > > engineering (just non-sec-related software engineering...), so forgive my > > dumbness! > > > > 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/
