SMBGhost: Wormable RCE via SMBv3 compression. Disable SMBv3 compression immediately on all Windows 10/Server 2019 hosts and block TCP port 445 at the perimeter. No patch for several weeks after disclosure — apply March 2020 patches now.
A remote code execution vulnerability exists in the way that the Microsoft Server Message Block 3.1.1 (SMBv3) protocol handles certain requests. SMBGhost vulnerability.
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