APP: Microsoft Windows Authentication Kerberos NTLM Fallback Security Bypass
A security feature bypass vulnerability has been reported in the Kerberos authentication module of Microsoft Windows. Successful exploitation allows an attacker to alter the cached credentials on the target machine, providing access to the vulnerable machine as the target user.
Extended Description
Kerberos in Microsoft Windows Vista SP2; Windows Server 2008 SP2 and R2 SP1; Windows 7 SP1; Windows 8.1; Windows Server 2012 Gold and R2; Windows RT 8.1; and Windows 10 Gold, 1511, and 1607 allows man-in-the-middle attackers to bypass authentication via vectors related to a fallback to NTLM authentication during a domain account password change, aka "Kerberos Security Feature Bypass Vulnerability."
Affected Products
Microsoft windows_rt_8.1
References
CVE: CVE-2016-3237
Short Name
APP:KERBEROS:WIN-KERB-FALLBACK
Severity
Major
Recommended
True
Recommended Action
Drop
Category
APP
Keywords
Authentication Bypass CVE-2016-3237 Fallback Kerberos Microsoft NTLM Security Windows
Release Date
09/08/2016
Supported Platforms
srx-branch-12.3
srx-19.3
srx-branch-19.3
vsrx3bsd-19.2
srx-branch-19.4
vsrx-19.4
mx-12.3
mx-19.4
vmx-19.4
mx-19.3
vsrx3bsd-19.4
srx-19.4
vsrx-12.3
vmx-19.3
vsrx-19.2
srx-12.3
Sigpack Version
3590
Port
TCP/88
False Positive
Unknown
Vendors
Microsoft
CVSS Score
6.8