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Vigil@nce: Windows, buffer overflow via WMS nskey.dll

August 2008 by Vigil@nce

SYNTHESIS

A remote attacker can create a malicious website, which implement
Windows Media Services ActiveX, in order to create a buffer
overflow and thus execute code on victim’s computer.

Gravity: 2/4

Consequences: privileged access/rights

Provenance: internet server

Means of attack: 1 attack

Ability of attacker: technician (2/4)

Confidence: confirmed by the editor (5/5)

Diffusion of the vulnerable configuration: high (3/3)

Creation date: 25/08/2008

Identifier: VIGILANCE-VUL-8050

IMPACTED PRODUCTS

 Microsoft Windows 2000 [confidential versions]

DESCRIPTION

Windows Media Services (WMS) is a streaming server using ActiveX
controllers.

WMS purposes a vulnerable function : "CallHTMLHelp" in the
"nskey.dll" file.

An attacker can create a website calling this function in a
malicious way, this will generate a buffer overflow and it will be
possible to execute code on victim’s computer.

CHARACTERISTICS

Identifiers: VIGILANCE-VUL-8050

https://vigilance.aql.fr/tree/1/8050


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