Advisory 07/2005: Jaws Multiple Remote Code Execution Vulnerabilities




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Hardened-PHP Project
www.hardened-php.net

-= Security Advisory =-



Advisory: Jaws Multiple Remote Code Execution Vulnerabilities
Release Date: 2005/07/06
Last Modified: 2005/07/06
Author: Stefan Esser [sesser@hardened-php.net]

Application: Jaws <= 0.5.2
Severity: Multiple Security Holes in Jaws allow remote code
execution
Risk: Critical
Vendor Status: Vendor doesn't consider this serious enough
References: http://www.hardened-php.net/advisory-072005.php


Overview:

Quote from http://www.jaws.com.mx
"Jaws is a Framework and Content Management System for building
dynamic web sites. It aims to be User Friendly giving ease of use
and lots of ways to customize web sites, but at the same time is
Developer Frendly, it offers a simple and powerful framework to
hack your own modules."

An audit of Jaws revealed that it uses XML_RPC and is therefore
vulnerable to the known eval() hole. Additionally the Blog gadget
is vulnerable to a remote URL inclusion vulnerability.

The vendor, although we contacted him credits Gulftech for the
XML_RPC vulnerability. He also believes, that a remote URL inclusion
vulnerability that is only exploitable with register_globals
turned on, which is the default on most servers, is not serious.

Because of this they released an updated version of Jaws, that
is still vulnerable to remote code execution through the Blog
gadget.


Details:

A quick audit of Jaws revealed, that they are using the XMLRPC
library. This audit also revealed that the file BlogModel.php
of the Blog gadget suffers a remote URL include vulnerability
triggered by the global variable 'path'.

Unfortunately for the users of Jaws, the vendor believes that
a remote URL inclusion vulnerability is not serious and
therefore they released an update to Jaws in response to our
notification, that only upgrades the bundled XMLRPC library.
This means, although they know better the Jaws developers
expose their user to a serious security hole in their Blog
gadget.

Impudent like they are, they are also crediting the XMLRPC
finding to Gulftech, although we contacted them. But this is
not uncommon. Secunia and some Linux vendors still claim, that
Gulftech has informed the PEAR developers about this
vulnerability, which is of course a lie.


Proof of Concept:

The Hardened-PHP Project is not going to release an exploit
for this vulnerability to the public.


Disclosure Timeline:

05. July 2005 - Contacted jaws vendor via email
05. July 2005 - Vendor releases Jaws 0.5.2 which only upgrades
the bundled XML_RPC
06. July 2005 - Public disclosure


Recommendation:

Because there is actually no fix for this vulnerability we
recommend that you simply do not use Jaws at all. Code that does
require register_globals turned off to be secure should be
avoided.

Alternatively you can simply install the Hardening-Patch to
stop this and all other remote URL include vulnerabilities.


GPG-Key:

http://www.hardened-php.net/hardened-php-signature-key.asc

pub 1024D/0A864AA1 2004-04-17 Hardened-PHP Signature Key
Key fingerprint = 066F A6D0 E57E 9936 9082 7E52 4439 14CC 0A86 4AA1


Copyright 2005 Stefan Esser. All rights reserved.

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