Possibly network is dangerous or app has vulnerability or their network connection was too bad If error is raised for attacker, attacker could know their illegal access might be caught. Shared session is rare in real apps, but such apps may exist. Then I updated the session vars with the login results and used the header function to switch to the secure location. So I lost data from my current session wrong session-id. Anyway, thanks John for the explanation. What I want to know is, is it just a random sequence of characters, or is it like the uniqid function? Above attack can be done by existing tools. More information on those settings is provided on: Get a shared session.
I tried everything people here said, and none of their combinations worked. Obsolete session data must be removed few seconds to few minutes later. I would expect a function which creates a new session id to do all necessary steps to have client and server synchronised. Only when a user visits a page that depends on unsaved session data will there be any indication of the failure. The error messages are better to modify so that users can distinguish the cause.
Why solution proposed by or can't be integrated into core Yii? In a nutshell, how session works: Client side: php is sending back to the client, a cookie with the id of the session. Hope this helps someone out there. Casting the return value to string, solved it. The secure page would check for the session vars, not find them, and force the user to log in again. I tried to make it a little more generic and usable for instance, in the full version it throws different types of exceptions for the different types of session issues , so hopefully someone might find it useful.
However, it may not be enough for subways. Possibly network is dangerous or app has vulnerability If error is raised for attacker, attacker could know they might be caught by illegal access. The higher you set session. Care should be taken when relying on the session for authentication. This prevents lost session under unstable network. Again, it happens only in Internet Explorer other browsers not affected , but on different machines just checked at home computer, previously validated at few office machines. It still has higher chances of random lost session also.
This could be rare, but the app might be affected by this is perfectly valid app. Could we please take a look at the error logs for such cases possibly with max enabled error reporting? I lost the session data randomly, without any pattern. For example: If we run this code in two processes using the same session, such as two tabs , then one will return 3 seconds while the other will return 6 seconds. Errors for accessing invalid session may be raised for either legitimate user or attacker. For example, the file session handler only allows characters in the range a-z A-Z 0-9 , comma and - minus! Env: localhost Note: condition is mandatory, otherwise it destroys on each load.
I think this causes bugs like 49462. I don't know that this is really a security concern so long as you are following a single-session per request design i. So much so, it is not worth worrying about unless you have lots of concurrent users. After the second login the session would be found and they could continue. It remains open for past eleven months. Depending on the session handler, not all characters are allowed within the session id.
What did it in 4. What is the current status of this issue? This can be achieved by time stamp in session data. Provide details and share your research! I tried everything, file logging directly from the write function, global debugging variable increments, static class properties. For example, a page that makes an ajax request, where the ajax request polls a server-side event and may not return immediately. It's better to delete old session data to reduce risk of session hijack. Obviously need a good caching or fast database with a lot of clients, because everyone will spawn a new stream connection.
. This kind of attacks can be done by existing tools. For example, files save handler locks session data file and if other request try to read it, it waits unlock. Its caused because the first process lock the session file. I had a problem with realizing the restore password form. In both my recent projects, it started to happen at some point of development, not from the beginning.