Kerberos Spoofing Vulnerability in Microsoft Windows Server 2008 R2 and Windows 7

CVE-2011-0091 · MEDIUM Severity

AV:N/AC:L/AU:N/C:P/I:P/A:N

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."

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