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CVE Number Vulnerability Product Severity Date
CVE-2018-0833 Windows Denial of Service Vulnerability Windows 8.1 Important 14-02-2018

Technical Information

Brief overview of the risk:
A denial of service vulnerability exists in implementations of the Microsoft Server Message Block 2.0 and 3.0 (SMBv2/SMBv3) client. The vulnerability is due to improper handling of certain requests sent by a malicious SMB server to the client. An attacker who successfully exploited this vulnerability could cause the affected system to stop responding until it is manually restarted.

Detailed Information on the risk:
To exploit the vulnerability, an attacker could use various methods such as redirectors, injected HTML header links, etc., which could cause the SMB client to connect to a malicious SMB server.
The security update addresses the vulnerability by correcting how the Microsoft SMBv2/SMBv3 Client handles specially crafted requests.

Further information on this exploit is available at : CVE-2018-0833

Affected Software

Windows 8.1 for 32-bit systems
Windows 8.1 for x64-based systems
Windows Server 2012 R2
Windows RT 8.1
Windows Server 2012 R2 (Server Core installation)