CVE-2011-0091

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."

Category

6.4
CVSS
Severity: Medium
CVSS 2.0 •
EPSS 2.48% Top 20%
Vendor Advisory microsoft.com
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
http://www.securityfocus.com/bid/46140 vdb entry
http://osvdb.org/70835 vdb entry
http://support.avaya.com/css/P8/documents/100127250
http://secunia.com/advisories/43257 third party advisory
https://exchange.xforce.ibmcloud.com/vulnerabilities/64901 vdb entry
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2011/ms11-013 vendor advisory
http://www.vupen.com/english/advisories/2011/0326 vdb entry
http://www.securitytracker.com/id?1025048 vdb entry
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A12498 vdb entry signature

Frequently Asked Questions

What is the severity of CVE-2011-0091?
CVE-2011-0091 has been scored as a medium severity vulnerability.
How to fix CVE-2011-0091?
To fix CVE-2011-0091, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2011-0091 being actively exploited in the wild?
It is possible that CVE-2011-0091 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~2% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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