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Zend Framework XXE Injection

Zend Framework XXE Injection
Posted Aug 11, 2012
Authored by MustLive

Zend Framework suffers from local file disclosure via XXE injection.

tags | exploit, local, xxe
SHA-256 | eb7c6a34464370c4bd7ce549e0dfb4ef4024f3518120db41e18e374bcccf17c4

Zend Framework XXE Injection

Change Mirror Download

I'll give you additional information concerning SEC Consult Vulnerability
Lab Security Advisory 20120626-0 (http://securityvulns.ru/docs28331.html).

This advisory was about Local file disclosure via XXE injection in Zend
Framework and was talking only about Local File Disclosure attack vector. It
was just mentioned in description that via this vulnerability it's also
possibility to open arbitrary TCP connections. LFD attack vector is
important and is has more risk, so it's clear why Daniel concentrated on it.
But I think that other attack vector is also important, so will bring your
attention to it.

As I've wrote in my July's article "Using XML External Entities (XXE) for
attacks on other sites", which I've announced last week in WASC Mailing List
XXE vulnerabilities could be used for attacks on other sites. Similarly as
AoF vulnerabilities, about which I've wrote in my 2010's article "Using of
the sites for attacks on other sites"
In this article I've wrote about possibility of attacks on other sites via
Abuse of Functionality and Remote File Include vulnerabilities, and showed
examples of Abuse of Functionality holes at different web sites (including
sites of Google, Yahoo and W3C). In similar way XXE vulnerabilities can be
used for conducting CSRF and DoS attacks on other sites.

XEE (WASC-43):

For the attack it's needed to send the next XML data in POST request:

<?xml version="1.0"?>
<!DOCTYPE foo [
<!ELEMENT methodName ANY>
<!ENTITY xxe SYSTEM "http://site/page" >]>

It concerns as Zend Framework and different web applications, which are
using Zend Framework (XXE holes in some of them were disclosed recently), as
to those applications, holes in which were disclosed earlier. Like Adobe
BlazeDS, Adobe LiveCycle Data Services ES2, Adobe ColdFusion, Adobe
LiveCycle ES2 (http://securityvulns.ru/Xdocument288.html).

So there are multiple web applications and thousands of web sites, which are
vulnerable to these attacks (via Zend Framework and web applications based
on it and via old versions of multiple Adobe's products). Not thousands of
web applications (about AoF vulnerabilities in which I've wrote during
2010-2011) and millions of web sites, but still a lot, and in total we have
a lot of web sites, which can be used for attacks on other sites via
different vulnerabilities (AoF, RFI, XXE). So web developers also should
draw attention to this attack vector.

Best wishes & regards,
Administrator of Websecurity web site

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