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Vulnerability of Windows: privilege escalation via DirectShow

Synthesis of the vulnerability 

A local attacker can use DirectShow of Windows, in order to escalate his privileges.
Impacted software: Windows 2008 R0, Windows 2008 R2, Windows 2012, Windows 7, Windows 8, Windows Vista.
Severity of this computer vulnerability: 2/4.
Creation date: 08/07/2014.
Références of this announce: 2975681, CERTFR-2014-AVI-304, CVE-2014-2780, MS14-041, VIGILANCE-VUL-15010, ZDI-14-221.

Description of the vulnerability 

The Windows Integrity mechanism associates a trust level to a program.

The DirectShow technology displays multimedia documents.

However, a process with a low Integrity can be used with DirectShow, to execute a program with privileges of the current user.

A local attacker can therefore use DirectShow of Windows, in order to escalate his privileges.
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This weakness note impacts software or systems such as Windows 2008 R0, Windows 2008 R2, Windows 2012, Windows 7, Windows 8, Windows Vista.

Our Vigil@nce team determined that the severity of this threat note is medium.

The trust level is of type confirmed by the editor, with an origin of user shell.

An attacker with a expert ability can exploit this computer weakness.

Solutions for this threat 

Windows: patch for DirectShow.
A patch is available in information sources.
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