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Vulnerability Details : CVE-2011-0091

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."
Publish Date : 2011-02-10 Last Update Date : 2011-07-18
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- CVSS Scores & Vulnerability Types

CVSS Score
6.4
Confidentiality Impact Partial (There is considerable informational disclosure.)
Integrity Impact Partial (Modification of some system files or information is possible, but the attacker does not have control over what can be modified, or the scope of what the attacker can affect is limited.)
Availability Impact None (There is no impact to the availability of the system.)
Access Complexity Low (Specialized access conditions or extenuating circumstances do not exist. Very little knowledge or skill is required to exploit. )
Authentication Not required (Authentication is not required to exploit the vulnerability.)
Gained Access None
Vulnerability Type(s) Obtain Information
CWE ID 287

- Related OVAL Definitions

Title Definition Id Class Family
Kerberos Spoofing Vulnerability oval:org.mitre.oval:def:12498 windows
MS11-013: Vulnerabilities in Kerberos Could Allow Elevation of Privilege (2496930) oval:gov.nist.fdcc.patch:def:11737 windows
OVAL (Open Vulnerability and Assessment Language) definitions define exactly what should be done to verify a vulnerability or a missing patch. Check out the OVAL definitions if you want to learn what you should do to verify a vulnerability.

- Products Affected By CVE-2011-0091

# Product Type Vendor Product Version Update Edition Language
1 OS Microsoft Windows 7 - - X32 Version Details Vulnerabilities
2 OS Microsoft Windows 7 - - X64 Version Details Vulnerabilities
3 OS Microsoft Windows Server 2008 R2 Itanium Version Details Vulnerabilities
4 OS Microsoft Windows Server 2008 R2 X64 Version Details Vulnerabilities

- Number Of Affected Versions By Product

Vendor Product Vulnerable Versions
Microsoft Windows 7 2
Microsoft Windows Server 2008 2

- References For CVE-2011-0091

http://osvdb.org/70835
OSVDB 70835 Microsoft Windows Kerberos Authentication Downgrade Weakness Microsoft Windows Kerberos Authentication Downgrade Weakness
http://support.avaya.com/css/P8/documents/100127250 CONFIRM
http://secunia.com/advisories/43257
SECUNIA 43257
http://www.securityfocus.com/bid/46140
BID 46140 Microsoft Windows Kerberos Encryption Standard Spoofing Vulnerability Release Date:2011-03-16
http://www.securitytracker.com/id?1025048
SECTRACK 1025048
http://www.vupen.com/english/advisories/2011/0326
VUPEN ADV-2011-0326
http://technet.microsoft.com/en-us/security/bulletin/ms11-013
Microsoft Security Bulletin MS11-013 MS11-013 - Important: Vulnerabilities in Kerberos Could Allow Elevation of Privilege (2496930) Bulletin Severity Rating:Important - This security update resolves one privately reported vulnerability and one publicly disclosed vulnerability in Microsoft Windows. The more severe of these vulnerabilities could allow elevation of privilege if a local, authenticated attacker installs a malicious service on a domain-joined computer.Release Date:2011-02-08
http://xforce.iss.net/xforce/xfdb/64901
XF ms-kerberos-spoofing(64901)

- Metasploit Modules Related To CVE-2011-0091

There are not any metasploit modules related to this vulnerability (Please visit www.metasploit.com for more information)


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