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IBM WebSphere MQ File Transfer Insufficent Access Control

IBM WebSphere MQ File Transfer Insufficent Access Control
Posted Aug 12, 2012
Authored by Nir Valtman

IBM Websphere versions 7.0.4 and below suffer from a control failure that allows privilege escalation.

tags | exploit
advisories | CVE-2012-2206
SHA-256 | f73bc1daa5118698b024e543caec71366acef661f7142dd1425fbd1b910e0843

IBM WebSphere MQ File Transfer Insufficent Access Control

Change Mirror Download
*Exploit Author:* Nir Valtman

*Affected Platforms: *Version 7.0.4 and all previous versions of
WebSphereMQ File Transfer
Edition<http://publib.boulder.ibm.com/infocenter/wmqfte/v7r0/index.jsp>running
on all platforms are affected.

Apparently they
published the CVE above without mentioning my name, since I found it in the
same time while IBM's team found it. This mail contains the exploitation
methods of the CVE
above<http://www-01.ibm.com/support/docview.wss?uid=swg21607481>

*Description:* Malicious user is able to access other user's files and
filespaces.
*
*
*Details:*
*1. Privilege escalation to view other user's files and filespace*
I logged on using user "user2" (non-administrative account
with download\upload files permissions only) and then sent a GET request to
the following URL:
/transfer/?start=0&count=10&metadata=fteSamplesUser=user1
As a result, the response included the data of "user1".

*2. Privilege escalation to download user user's files*
In order to execute the attack, the malicious user should know the file
name and the related ID before executing the attack.
In this scenario, The malicious user is "user2" and the attacked user is
"user1".
If "user2" knows the url to file of "user1", then he can access this file,
e.g. "user2" is able to access the following URL using a GET request:
/filespace/user1
/414d512057514d542020202020202020eb3bfc4f2030df02/changedthisfilename.txt

Best Regards,
Nir Valtman

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