From: toni at schornboeck dot net
Operating system: windows
PHP version: 5.1.4
PHP Bug Type: Session related
Bug description: session_start can't handle broken cookies
Description:
------------
session_start() can't handle broken cookies at all.
When a cookie with the name of the session exists, even if it's malformed,
for example containing invalid characters, session_start just assumes it is
a correct session id - and fails horribly when trying to save data in a
file with that "id".
Reproduce code:
---------------
<?php
ob_start();
//setcookie('session_cookie', gzcompress('ä#+´!')); //just call once
session_name('session_cookie');
session_start();
echo 'test = ',$_SESSION['test'];
$_SESSION['test']='foo';
ob_end_flush();
?>
Expected result:
----------------
Either session_start() should return false or it needs to overwrite the
cookie.
Nevertheless this code shouldn't produce any errors and save the session
variable test correctly.
Output:
test = foo
Actual result:
--------------
Warning: session_start() [function.session-start]: The session id contains
illegal characters, valid characters are a-z, A-Z, 0-9 and '-,' in
C:\xampp\xampp\htdocs\yawe\bug.php on line 6
test =
Warning: Unknown: The session id contains illegal characters, valid
characters are a-z, A-Z, 0-9 and '-,' in Unknown on line 0
Warning: Unknown: Failed to write session data (files). Please verify that
the current setting of session.save_path is correct (C:\xampp\xampp\tmp) in
Unknown on line 0
and session_start sets the cookie with the same corrupted "session id"
again...
--
Edit bug report at http://bugs.php.net/?id=38224&edit=1
--
Try a CVS snapshot (PHP 4.4):
http://bugs.php.net/fix.php?id=38224&r=trysnapshot44
Try a CVS snapshot (PHP 5.2):
http://bugs.php.net/fix.php?id=38224&r=trysnapshot52
Try a CVS snapshot (PHP 6.0):
http://bugs.php.net/fix.php?id=38224&r=trysnapshot60
Fixed in CVS: http://bugs.php.net/fix.php?id=38224&r=fixedcvs
Fixed in release:
http://bugs.php.net/fix.php?id=38224&r=alreadyfixed
Need backtrace: http://bugs.php.net/fix.php?id=38224&r=needtrace
Need Reproduce Script: http://bugs.php.net/fix.php?id=38224&r=needscript
Try newer version: http://bugs.php.net/fix.php?id=38224&r=oldversion
Not developer issue: http://bugs.php.net/fix.php?id=38224&r=support
Expected behavior: http://bugs.php.net/fix.php?id=38224&r=notwrong
Not enough info:
http://bugs.php.net/fix.php?id=38224&r=notenoughinfo
Submitted twice:
http://bugs.php.net/fix.php?id=38224&r=submittedtwice
register_globals: http://bugs.php.net/fix.php?id=38224&r=globals
PHP 3 support discontinued: http://bugs.php.net/fix.php?id=38224&r=php3
Daylight Savings: http://bugs.php.net/fix.php?id=38224&r=dst
IIS Stability: http://bugs.php.net/fix.php?id=38224&r=isapi
Install GNU Sed: http://bugs.php.net/fix.php?id=38224&r=gnused
Floating point limitations: http://bugs.php.net/fix.php?id=38224&r=float
No Zend Extensions: http://bugs.php.net/fix.php?id=38224&r=nozend
MySQL Configuration Error: http://bugs.php.net/fix.php?id=38224&r=mysqlcfg
