From: eion at bigfoot dot com
Operating system: Gentoo Linux
PHP version: 4.4.4
PHP Bug Type: cURL related
Bug description: cURL can be used to bypass allow_url_fopen=off
Description:
------------
Using cURL, there is no check for allow_url_fopen, so although
file_get_contents('http://...'); doesn't work, CURLOPT_URL='http://...'
does work.
This could allow remote code execution.
I guess this is sort of related to the cURL safe_mode bypass that was
fixed in 4.4.4
(not sure if this should be sent to [EMAIL PROTECTED] tho)
Reproduce code:
---------------
//with allow_url_fopen off, file_get_contents doesn't work:
$data = file_get_contents('http://php.net');
//with allow_url_fopen off, curl_exec does work:
function file_getc($url)
{
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_HEADER, 0);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
$data = curl_exec($ch);
curl_close($ch);
return $data;
}
$data = file_getc($data);
Expected result:
----------------
That both file_get_contents and curl_exec throw warnings, blocking url
openings
Actual result:
--------------
Warning: main() [function.main]: URL file-access is disabled in the server
configuration in demo.php on line 2
.... [other warnings, standard to allow_url_fopen warnings]
.... [php.net website contents]
--
Edit bug report at http://bugs.php.net/?id=40396&edit=1
--
Try a CVS snapshot (PHP 4.4):
http://bugs.php.net/fix.php?id=40396&r=trysnapshot44
Try a CVS snapshot (PHP 5.2):
http://bugs.php.net/fix.php?id=40396&r=trysnapshot52
Try a CVS snapshot (PHP 6.0):
http://bugs.php.net/fix.php?id=40396&r=trysnapshot60
Fixed in CVS: http://bugs.php.net/fix.php?id=40396&r=fixedcvs
Fixed in release:
http://bugs.php.net/fix.php?id=40396&r=alreadyfixed
Need backtrace: http://bugs.php.net/fix.php?id=40396&r=needtrace
Need Reproduce Script: http://bugs.php.net/fix.php?id=40396&r=needscript
Try newer version: http://bugs.php.net/fix.php?id=40396&r=oldversion
Not developer issue: http://bugs.php.net/fix.php?id=40396&r=support
Expected behavior: http://bugs.php.net/fix.php?id=40396&r=notwrong
Not enough info:
http://bugs.php.net/fix.php?id=40396&r=notenoughinfo
Submitted twice:
http://bugs.php.net/fix.php?id=40396&r=submittedtwice
register_globals: http://bugs.php.net/fix.php?id=40396&r=globals
PHP 3 support discontinued: http://bugs.php.net/fix.php?id=40396&r=php3
Daylight Savings: http://bugs.php.net/fix.php?id=40396&r=dst
IIS Stability: http://bugs.php.net/fix.php?id=40396&r=isapi
Install GNU Sed: http://bugs.php.net/fix.php?id=40396&r=gnused
Floating point limitations: http://bugs.php.net/fix.php?id=40396&r=float
No Zend Extensions: http://bugs.php.net/fix.php?id=40396&r=nozend
MySQL Configuration Error: http://bugs.php.net/fix.php?id=40396&r=mysqlcfg
