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To improve our services to our customers, we have made a number of
additions to the Secunia Advisories and have started translating the
advisories to German.

The improvements will help our customers to get a better
understanding of how we reached our conclusions, how it was rated,
our thoughts on exploitation, attack vectors, and scenarios.

This includes:
* Reason for rating
* Extended description
* Extended solution
* Exploit code or links to exploit code
* Deep links

Read the full description:
http://corporate.secunia.com/products/48/?r=l

Contact Secunia Sales for more information:
http://corporate.secunia.com/how_to_buy/15/?r=l

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TITLE:
Microsoft Windows Internet Connection Sharing Denial of Service

SECUNIA ADVISORY ID:
SA22592

VERIFY ADVISORY:
http://secunia.com/advisories/22592/

CRITICAL:
Less critical

IMPACT:
DoS

WHERE:
>From local network

OPERATING SYSTEM:
Microsoft Windows XP Home Edition
http://secunia.com/product/16/
Microsoft Windows XP Professional
http://secunia.com/product/22/

DESCRIPTION:
h07 has discovered a vulnerability in Microsoft Windows, which can be
exploited by malicious people to cause a DoS (Denial of Service).

The vulnerability is caused due to a NULL pointer dereference error
in Windows NAT Helper Components (ipnathlp.dll). This can be
exploited to crash the service via a specially crafted DNS query.

Successful exploitation requires that Internet Connection Sharing is
enabled and the query is received from a client on the shared network
interface.

The vulnerability is confirmed in a fully patched Windows XP SP2
system. Other versions may also be affected.

SOLUTION:
Use another way of sharing the Internet connection.

PROVIDED AND/OR DISCOVERED BY:
h07

ORIGINAL ADVISORY:
http://milw0rm.com/exploits/2672

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About:
This Advisory was delivered by Secunia as a free service to help
everybody keeping their systems up to date against the latest
vulnerabilities.

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http://secunia.com/about_secunia_advisories/


Please Note:
Secunia recommends that you verify all advisories you receive by
clicking the link.
Secunia NEVER sends attached files with advisories.
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