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TITLE:
Windows Remote Desktop Protocol Private Key Disclosure

SECUNIA ADVISORY ID:
SA15605

VERIFY ADVISORY:
http://secunia.com/advisories/15605/

CRITICAL:
Less critical

IMPACT:
Hijacking

WHERE:
>From remote

OPERATING SYSTEM:
Microsoft Windows 2000 Advanced Server
http://secunia.com/product/21/
Microsoft Windows 2000 Datacenter Server
http://secunia.com/product/1177/
Microsoft Windows 2000 Server
http://secunia.com/product/20/
Microsoft Windows Server 2003 Datacenter Edition
http://secunia.com/product/1175/
Microsoft Windows Server 2003 Enterprise Edition
http://secunia.com/product/1174/
Microsoft Windows Server 2003 Standard Edition
http://secunia.com/product/1173/
Microsoft Windows Server 2003 Web Edition
http://secunia.com/product/1176/
Microsoft Windows XP Home Edition
http://secunia.com/product/16/
Microsoft Windows XP Professional
http://secunia.com/product/22/

DESCRIPTION:
Massimiliano Montoro has reported a security issue in Microsoft
Windows, which can be exploited by malicious people to conduct MitM
(Man-in-the-Middle) attacks.

The problem is that the private key used for signing a terminal
server's public key is hard-coded into the mstlsapi.dll library. This
can be exploited to calculate a valid signature, which can be used for
performing MitM attacks.

Successful exploitation requires that a malicious person is able to
intercept traffic between the terminal client and terminal server.

NOTE: Functionality for exploiting this has reportedly been included
in Cain & Abel 2.7.

SOLUTION:
Connect only to terminal services over trusted networks.

PROVIDED AND/OR DISCOVERED BY:
Massimiliano Montoro

ORIGINAL ADVISORY:
Massimiliano Montoro:
http://www.oxid.it/downloads/rdp-gbu.pdf

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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.

Subscribe:
http://secunia.com/secunia_security_advisories/

Definitions: (Criticality, Where etc.)
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.
Secunia does not advise people to install third party patches, only
use those supplied by the vendor.

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