From:
Operating system: all
PHP version: 5.3.3
Package: Streams related
Bug Type: Bug
Bug description:ini variable user_agent allows arbitrary injection
Description:
------------
The php.ini variable user_agent is not properly sanitized. This allows
arbitrary header injection for any HTTP(S) request made using the http
stream wrapper (see code). This bug has grown a feature, but now using
stream_context_set_option this behaviour should be deprecated.
Test script:
---------------
<?php
// before, insecure:
ini_set('user_agent', "PHP\r\nX-MyCustomHeader: Foo");
$f=file_get_contents('http://www.example.com/index.php');
// now, proper way of adding headers:
$s=stream_context_create();
stream_context_set_option($s,"http","header","X-MyCustomHeader: Foo");
ini_set('user_agent', "PHPX-MyCustomHeader: Foo");
$f=file_get_contents('http://www.example.com/index.php',false,$s);
?>
--
Edit bug report at http://bugs.php.net/bug.php?id=52979&edit=1
--
Try a snapshot (PHP 5.2):
http://bugs.php.net/fix.php?id=52979&r=trysnapshot52
Try a snapshot (PHP 5.3):
http://bugs.php.net/fix.php?id=52979&r=trysnapshot53
Try a snapshot (trunk):
http://bugs.php.net/fix.php?id=52979&r=trysnapshottrunk
Fixed in SVN:
http://bugs.php.net/fix.php?id=52979&r=fixed
Fixed in SVN and need be documented:
http://bugs.php.net/fix.php?id=52979&r=needdocs
Fixed in release:
http://bugs.php.net/fix.php?id=52979&r=alreadyfixed
Need backtrace:
http://bugs.php.net/fix.php?id=52979&r=needtrace
Need Reproduce Script:
http://bugs.php.net/fix.php?id=52979&r=needscript
Try newer version:
http://bugs.php.net/fix.php?id=52979&r=oldversion
Not developer issue:
http://bugs.php.net/fix.php?id=52979&r=support
Expected behavior:
http://bugs.php.net/fix.php?id=52979&r=notwrong
Not enough info:
http://bugs.php.net/fix.php?id=52979&r=notenoughinfo
Submitted twice:
http://bugs.php.net/fix.php?id=52979&r=submittedtwice
register_globals:
http://bugs.php.net/fix.php?id=52979&r=globals
PHP 4 support discontinued: http://bugs.php.net/fix.php?id=52979&r=php4
Daylight Savings: http://bugs.php.net/fix.php?id=52979&r=dst
IIS Stability:
http://bugs.php.net/fix.php?id=52979&r=isapi
Install GNU Sed:
http://bugs.php.net/fix.php?id=52979&r=gnused
Floating point limitations:
http://bugs.php.net/fix.php?id=52979&r=float
No Zend Extensions:
http://bugs.php.net/fix.php?id=52979&r=nozend
MySQL Configuration Error:
http://bugs.php.net/fix.php?id=52979&r=mysqlcfg
