CVE-2011-0091

Severity CVSS v4.0:

Pending analysis

Type:

CWE-287 Authentication Issues

Publication date:

10/02/2011

Last modified:

11/04/2025

Description

Kerberos in Microsoft Windows Server 2008 R2 and Windows 7 does not prevent a session from changing from strong encryption to DES encryption, which allows man-in-the-middle attackers to spoof network traffic and obtain sensitive information via a DES downgrade, aka "Kerberos Spoofing Vulnerability."

Impact

Vector 2.0

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

Base Score: 6.40 MEDIUM
Vector: AV:N/AC:L/Au:N/C:P/I:P/A:N

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

Base Score 2.0

6.40

Severity 2.0

MEDIUM

Vulnerable products and versions

CPE	From	Up to
cpe:2.3:o:microsoft:windows_7:-:::::::*
cpe:2.3:o:microsoft:windows_server_2008:r2::itanium:::::
cpe:2.3:o:microsoft:windows_server_2008:r2::x64:::::

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

CVE-2011-0091

Description

Impact

Vulnerable products and versions

References to Advisories, Solutions, and Tools