MS11-005: Vulnerability in Active Directory Could Allow Denial of Service (2478953)

Medium Nessus Plugin ID 51905


The directory service on the remote host is affected by denial of service vulnerability.


The version of Active Directory installed on the remote host fails to properly validate service principal names (SPN), which could result in SPN collisions. If a collision occurs, services that use the SPN will downgrade to NTLM when configured to do so. Services that are not configured to negotiate will become unavailable.

A remote attacker who has local administrator privileges on a domain- joined host can exploit this, resulting in a denial of service.


Microsoft has released a patch for Windows 2003.

See Also

Plugin Details

Severity: Medium

ID: 51905

File Name: smb_nt_ms11-005.nasl

Version: $Revision: 1.15 $

Type: local

Agent: windows

Published: 2011/02/08

Modified: 2017/07/26

Dependencies: 13855, 57033

Risk Information

Risk Factor: Medium


Base Score: 5

Temporal Score: 4.1

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P

Temporal Vector: CVSS2#E:F/RL:OF/RC:ND

Vulnerability Information

CPE: cpe:/o:microsoft:windows

Required KB Items: SMB/MS_Bulletin_Checks/Possible

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 2011/02/08

Vulnerability Publication Date: 2011/02/08

Reference Information

CVE: CVE-2011-0040

BID: 46145

OSVDB: 70825

MSFT: MS11-005

IAVB: 2011-B-0015

MSKB: 2478953