From:             bnies at bluewin dot ch
Operating system: Solaris 9
PHP version:      5.2.4
PHP Bug Type:     Session related
Bug description:  PHP Cookie expiration

Description:
------------
I'm not sure if it has fixed in PHP 5.2.4 but the problem is there in PHP
5.2.2.

If PHP terminates a session with session_unregister(); it sends these HTTP
headers to the browser:

Set-Cookie: SQMSESSID=deleted; expires=Thu, 09-Nov-2006 13:34:48 GMT;
path=/

The 'expires' option is an old option proposed by Netscape. See RFC 2109.
We stumbled across a session problem with a proxy software that ignores
this 'expires' option and implemented only the new 'Max-Age=0' option. The
expires=olddate is also bad, because one can never know what the time on
the remote side is. What if it the remote system clock more than one year
behind?

Could it be a fix to send both cookie expire options to make sure a cookie
gets really deleted:

Set-Cookie: SQMSESSID=deleted; expires=Thu, 09-Nov-2006 13:34:48 GMT;
path=/
Set-Cookie: SQMSESSID=deleted; Max-Age=0; path=/

The problem appeared with the proxy software that ignored cookie deletion
and then sent the session cookie with value "deleted" to the application
which then treatened the session ID "deleted" as valid session.

See here for more details:

https://sourceforge.net/tracker/index.php?func=detail&aid=1829025&group_id=311&atid=100311


Best Regards,
Bernd Nies



-- 
Edit bug report at http://bugs.php.net/?id=43226&edit=1
-- 
Try a CVS snapshot (PHP 4.4): 
http://bugs.php.net/fix.php?id=43226&r=trysnapshot44
Try a CVS snapshot (PHP 5.2): 
http://bugs.php.net/fix.php?id=43226&r=trysnapshot52
Try a CVS snapshot (PHP 5.3): 
http://bugs.php.net/fix.php?id=43226&r=trysnapshot53
Try a CVS snapshot (PHP 6.0): 
http://bugs.php.net/fix.php?id=43226&r=trysnapshot60
Fixed in CVS:                 http://bugs.php.net/fix.php?id=43226&r=fixedcvs
Fixed in release:             
http://bugs.php.net/fix.php?id=43226&r=alreadyfixed
Need backtrace:               http://bugs.php.net/fix.php?id=43226&r=needtrace
Need Reproduce Script:        http://bugs.php.net/fix.php?id=43226&r=needscript
Try newer version:            http://bugs.php.net/fix.php?id=43226&r=oldversion
Not developer issue:          http://bugs.php.net/fix.php?id=43226&r=support
Expected behavior:            http://bugs.php.net/fix.php?id=43226&r=notwrong
Not enough info:              
http://bugs.php.net/fix.php?id=43226&r=notenoughinfo
Submitted twice:              
http://bugs.php.net/fix.php?id=43226&r=submittedtwice
register_globals:             http://bugs.php.net/fix.php?id=43226&r=globals
PHP 3 support discontinued:   http://bugs.php.net/fix.php?id=43226&r=php3
Daylight Savings:             http://bugs.php.net/fix.php?id=43226&r=dst
IIS Stability:                http://bugs.php.net/fix.php?id=43226&r=isapi
Install GNU Sed:              http://bugs.php.net/fix.php?id=43226&r=gnused
Floating point limitations:   http://bugs.php.net/fix.php?id=43226&r=float
No Zend Extensions:           http://bugs.php.net/fix.php?id=43226&r=nozend
MySQL Configuration Error:    http://bugs.php.net/fix.php?id=43226&r=mysqlcfg

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