CVE-2011-0091
First published: Thu Feb 10 2011(Updated: )
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."
Credit: secure@microsoft.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Microsoft Windows Server | =r2 | |
| Microsoft Windows Server | =r2 | |
| Microsoft Windows 7 |
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Reference Links
- http://osvdb.org/70835
- http://www.securityfocus.com/bid/46140
- http://www.vupen.com/english/advisories/2011/0326
- http://support.avaya.com/css/P8/documents/100127250
- http://www.securitytracker.com/id?1025048
- http://secunia.com/advisories/43257
- https://exchange.xforce.ibmcloud.com/vulnerabilities/64901
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A12498
- https://docs.microsoft.com/en-us/security-updates/securitybulletins/2011/ms11-013
Frequently Asked Questions
What is the severity of CVE-2011-0091?
CVE-2011-0091 is classified as a critical vulnerability due to the potential for man-in-the-middle attacks and sensitive information exposure.
How does CVE-2011-0091 affect Microsoft Windows systems?
CVE-2011-0091 affects Microsoft Windows Server 2008 R2 and Windows 7 by allowing a downgrade in encryption methods.
How do I fix CVE-2011-0091?
To mitigate CVE-2011-0091, ensure that strong encryption settings are enforced and apply the latest Microsoft security patches.
What are the potential risks of CVE-2011-0091?
The risks associated with CVE-2011-0091 include unauthorized data access and the ability for attackers to spoof network traffic.
Is CVE-2011-0091 still a concern for users today?
While CVE-2011-0091 was identified in 2011, its relevance may persist for systems that have not been updated or replaced.
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