Improper input validation in Windows and Windows Server - CVE-2017-0146

Detailed vulnerability description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to an error when parsing requests in Microsoft Server Message Block 1.0 (SMBv1) server. A remote unauthenticated attacker can send specially crafted SMB packets and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Note: this vulnerability has been exploited in the wild and is publicly known as EternalChampion exploit.

How to mitigate CVE-2017-0146

Install updates from vendor's website.

Sources

• https://technet.microsoft.com/en-us/library/security/MS17-010