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Digital Defense VRT Advisory 2007.5

Digital Defense VRT Advisory 2007.5
Posted Oct 5, 2007
Authored by Digital Defense | Site netsupportmanager.com

The NetSupport Manager client that listens on TCP port 5405 does not properly validate input supplied during the initial connection sequence. Specifically, during the configuration exchange part of the initial connection setup, the client does not appear to validate the supplied data which can result in a DoS of the NetSupport Manager Client. Remote code exploitation is also thought to be possible.

tags | advisory, remote, tcp
SHA-256 | cde2525578cbe2844b74106d67cd9ea372d80d0491c48852fda02ce3f1368320

Digital Defense VRT Advisory 2007.5

Change Mirror Download
Title
-----
NetSupport Manager Client Buffer Overflow

Severity
--------
Medium

Date Discovered
---------------
9/4/2007

Discovered By
-------------
Digital Defense, Inc. Vulnerability Research Team Credit Given To: sxkeebler and r@b13$ http://www.digitaldefense.net/

Vulnerability Description
-------------------------
The NetSupport Manager client that listens on TCP port 5405 does not properly validate input supplied during the initial connection sequence.
Specifically, during the configuration exchange part of the initial connection setup, the client does not appear to validate the supplied data which can result in a DoS of the NetSupport Manager Client. Remote code exploitation is also thought to be possible. Within Technical Document ID TD545, NetSupport acknowledges that this flaw is present in unspecified versions of NetSupport School Student.

Solution Description
--------------------
Digital Defense, Inc. notified NetSupport on September 9, 2007 of this flaw but did not receive any response or acknowledgement from the vendor.
However, NetSupport has released a patch for this flaw as described by NetSupport Technical Document ID TD545.

Tested Systems / Software (with versions)
-----------------------------------------
NetSupport Manager 10.20 running on Windows XP SP2 and Windows 2K3 SP2.

NetSupport acknowledges in Technical Document ID TD545 that the following versions of the NetSupport Manager are vulnerable to this flaw:

NSM 10.00, NSS 9.00, NSM 10.20

Vendor Contact
--------------
NetSupport
http://www.netsupportmanager.com/
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