MS12-020: Vulnerabilities in Remote Desktop Could Allow Remote Code Execution (2671387) (uncredentialed check)

This script is Copyright (C) 2012-2017 Tenable Network Security, Inc.

Synopsis :

The remote Windows host could allow arbitrary code execution.

Description :

An arbitrary remote code vulnerability exists in the implementation of
the Remote Desktop Protocol (RDP) on the remote Windows host. The
vulnerability is due to the way that RDP accesses an object in memory
that has been improperly initialized or has been deleted.

If RDP has been enabled on the affected system, an unauthenticated,
remote attacker could leverage this vulnerability to cause the system to
execute arbitrary code by sending a sequence of specially crafted RDP
packets to it.

This plugin also checks for a denial of service vulnerability in
Microsoft Terminal Server.

Note that this script does not detect the vulnerability if the 'Allow
connections only from computers running Remote Desktop with Network
Level Authentication' setting is enabled or the security layer is set to
'SSL (TLS 1.0)' on the remote host.

See also :

Solution :

Microsoft has released a set of patches for Windows XP, 2003, Vista,
2008, 7, and 2008 R2.

Note that an extended support contract with Microsoft is required to
obtain the patch for this vulnerability for Windows 2000.

Risk factor :

High / CVSS Base Score : 9.3
CVSS Temporal Score : 7.3
Public Exploit Available : true

Family: Windows

Nessus Plugin ID: 58435 ()

Bugtraq ID: 52353

CVE ID: CVE-2012-0002

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