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Vulnerability of Windows: privilege escalation via Netlogon

Synthesis of the vulnerability

An attacker can use the Netlogon service of Windows, in order to escalate his privileges.
Severity of this bulletin: 2/4.
Creation date: 15/07/2015.
Références of this threat: 3068457, CERTFR-2015-AVI-296, CVE-2015-2374, MS15-071, VIGILANCE-VUL-17361.

Description of the vulnerability

The Netlogon service of Windows authenticates users on the domain, by connecting to a PDC (Primary Domain Controller).

However, an attacker can spoof the identity of a BDC (Backup Domain Controller), to then capture users' passwords.

An attacker can therefore use the Netlogon service of Windows, in order to escalate his privileges.
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This computer threat note impacts software or systems such as Windows 2003, Windows 2008 R0, Windows 2008 R2, Windows 2012.

Our Vigil@nce team determined that the severity of this weakness alert is medium.

The trust level is of type confirmed by the editor, with an origin of intranet client.

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

Solutions for this threat

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