Executive Summary

Informations
Name CVE-2011-0091 First vendor Publication 2011-02-10
Vendor Cve Last vendor Modification 2024-11-21

Security-Database Scoring CVSS v3

Cvss vector : N/A
Overall CVSS Score NA
Base Score NA Environmental Score NA
impact SubScore NA Temporal Score NA
Exploitabality Sub Score NA
 
Calculate full CVSS 3.0 Vectors scores

Security-Database Scoring CVSS v2

Cvss vector : (AV:N/AC:L/Au:N/C:P/I:P/A:N)
Cvss Base Score 6.4 Attack Range Network
Cvss Impact Score 4.9 Attack Complexity Low
Cvss Expoit Score 10 Authentication None Required
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Detail

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."

Original Source

Url : http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2011-0091

CWE : Common Weakness Enumeration

% Id Name
100 % CWE-287 Improper Authentication

OVAL Definitions

Definition Id: oval:org.mitre.oval:def:12498
 
Oval ID: oval:org.mitre.oval:def:12498
Title: Kerberos Spoofing Vulnerability
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."
Family: windows Class: vulnerability
Reference(s): CVE-2011-0091
 Version: 7
Platform(s): Microsoft Windows 7
Microsoft Windows Server 2008
Microsoft Windows Server 2008 R2
 Product(s):
Definition Synopsis:

CPE : Common Platform Enumeration

TypeDescriptionCount
Os 1
Os 2

OpenVAS Exploits

Date Description
2011-02-09 Name : Microsoft Kerberos Privilege Escalation Vulnerabilities (2496930)
File : nvt/secpod_ms11-013.nasl

Open Source Vulnerability Database (OSVDB)

Id Description
70835 Microsoft Windows Kerberos Authentication Downgrade Weakness

Microsoft Windows contains a flaw related to the implementation of Kerberos. The issue is triggered when a man-in-the-middle attacker downgrades the Kerberos authentication to use DES. This may allow an attacker to impersonate a legitimate users' credentials.

Information Assurance Vulnerability Management (IAVM)

Date Description
2011-02-10 IAVM : 2011-A-0021 - Multiple Vulnerabilities in Microsoft Windows Kerberos
Severity : Category II - VMSKEY : V0026067

Snort® IPS/IDS

Date Description
2014-01-10 Microsoft Windows Kerberos auth downgrade to DES MITM attempt
RuleID : 18414 - Revision : 9 - Type : OS-WINDOWS

Nessus® Vulnerability Scanner

Date Description
2011-02-08 Name : The remote implementation of Kerberos is affected by one or more vulnerabilit...
File : smb_nt_ms11-013.nasl - Type : ACT_GATHER_INFO

Sources (Detail)

http://osvdb.org/70835
http://secunia.com/advisories/43257
http://support.avaya.com/css/P8/documents/100127250
http://www.securityfocus.com/bid/46140
http://www.securitytracker.com/id?1025048
http://www.vupen.com/english/advisories/2011/0326
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2011/ms11...
https://exchange.xforce.ibmcloud.com/vulnerabilities/64901
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.ova...
Source Url

Alert History

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Date Informations
2024-11-28 23:06:08
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2014-02-17 10:59:25
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2013-11-11 12:39:10
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2013-05-10 22:52:14
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