CVE-2011-0040

Severity CVSS v4.0:

Pending analysis

Type:

CWE-20 Input Validation

Publication date:

09/02/2011

Last modified:

11/04/2025

Description

The server in Microsoft Active Directory on Windows Server 2003 SP2 does not properly handle an update request for a service principal name (SPN), which allows remote attackers to cause a denial of service (authentication downgrade or outage) via a crafted request that triggers name collisions, aka "Active Directory SPN Validation Vulnerability."

Impact

Vector 2.0

AV:N/AC:L/Au:N/C:N/I:N/A:P CVSS v2.0 Severity and Metrics:

Base Score: 5.00 MEDIUM
Vector: AV:N/AC:L/Au:N/C:N/I:N/A:P

Attack Vector (AV): Network
Attack Complexity (AC): Low
Authentication (Au): None
Confidentiality (C): None
Integrity (I): None
Availability (A): Physical

Base Score 2.0

5.00

Severity 2.0

MEDIUM

Vulnerable products and versions

CPE	From	Up to
cpe:2.3:o:microsoft:windows_2003_server::sp2::::::*
cpe:2.3:o:microsoft:windows_2003_server::sp2:itanium:::::
cpe:2.3:o:microsoft:windows_2003_server::sp2:x64:::::

To consult the complete list of CPE names with products and versions, see this page

CVE-2011-0040

Description

Impact

Vulnerable products and versions

References to Advisories, Solutions, and Tools