CVE-2020-0796 on CISA KEV

A remote code execution vulnerability exists in the way that the Microsoft Server Message Block 3.1.1 (SMBv3) protocol handles certain requests, aka 'Windows SMBv3 Client/Server Remote Code Execution Vulnerability'.

01What CISA says about this vulnerability

A remote code execution vulnerability exists in the way that the Microsoft Server Message Block 3.1.1 (SMBv3) protocol handles certain requests, aka 'Windows SMBv3 Client/Server Remote Code Execution Vulnerability'.

02Required action — verbatim from CISA

Apply updates per vendor instructions.

03Notes & references

• portal.msrc.microsoft.com — https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-0796
• packetstormsecurity.com — http://packetstormsecurity.com/files/156731/CoronaBlue-SMBGhost-Microsoft-Window…
• packetstormsecurity.com — http://packetstormsecurity.com/files/156732/Microsoft-Windows-SMB-3.1.1-Remote-C…
• packetstormsecurity.com — http://packetstormsecurity.com/files/156980/Microsoft-Windows-10-SMB-3.1.1-Local…
• packetstormsecurity.com — http://packetstormsecurity.com/files/157110/SMBv3-Compression-Buffer-Overflow.ht…
• packetstormsecurity.com — http://packetstormsecurity.com/files/157901/Microsoft-Windows-SMBGhost-Remote-Co…
• packetstormsecurity.com — http://packetstormsecurity.com/files/158054/SMBleed-SMBGhost-Pre-Authentication-…

04SARA's analyst layer — why this matters

This vulnerability is currently on the CISA KEV list, which CISA only adds CVEs to when there is reliable evidence of active exploitation in the wild. For federal civilian agencies, BOD 22-01 requires remediation by the due date above. For everyone else, KEV is the strongest "patch immediately" signal you can get from public threat intel.

05Affected products (summary)

Vendor	Product	Versions
Microsoft	Windows 10 Version 1903 for 32	bit Systems — unspecified
Microsoft	Windows 10 Version 1903 for x64	based Systems — unspecified
Microsoft	Windows 10 Version 1903 for ARM64	based Systems — unspecified
Microsoft	Windows Server, version 1903 (Server Core installation)	unspecified
Microsoft	Windows 10 Version 1909 for 32	bit Systems — unspecified
Microsoft	Windows 10 Version 1909 for x64	based Systems — unspecified
Microsoft	Windows 10 Version 1909 for ARM64	based Systems — unspecified
Microsoft	Windows Server, version 1909 (Server Core installation)	unspecified

06Detection

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