CVE-2020-0796

Known Exploited Public Exploit

Description

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'.

Category

10.0
CVSS
Severity: Critical
CVSS 3.1 •
CVSS 2.0 •
EPSS 94.42% Top 5%
KEV Since 
Vendor Advisory microsoft.com
Affected: Microsoft Windows 10 Version 1903 for 32-bit Systems
Affected: Microsoft Windows 10 Version 1903 for x64-based Systems
Affected: Microsoft Windows 10 Version 1903 for ARM64-based Systems
Affected: Microsoft Windows Server, version 1903 (Server Core installation)
Affected: Microsoft Windows 10 Version 1909 for 32-bit Systems
Affected: Microsoft Windows 10 Version 1909 for x64-based Systems
Affected: Microsoft Windows 10 Version 1909 for ARM64-based Systems
Affected: Microsoft Windows Server, version 1909 (Server Core installation)
Published at:
Updated at:

References

Link Tags
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-0796 patch vendor advisory
http://packetstormsecurity.com/files/156731/CoronaBlue-SMBGhost-Microsoft-Windows-10-SMB-3.1.1-Proof-Of-Concept.html third party advisory vdb entry
http://packetstormsecurity.com/files/156732/Microsoft-Windows-SMB-3.1.1-Remote-Code-Execution.html third party advisory vdb entry exploit
http://packetstormsecurity.com/files/156980/Microsoft-Windows-10-SMB-3.1.1-Local-Privilege-Escalation.html third party advisory vdb entry
http://packetstormsecurity.com/files/157110/SMBv3-Compression-Buffer-Overflow.html third party advisory vdb entry exploit
http://packetstormsecurity.com/files/157901/Microsoft-Windows-SMBGhost-Remote-Code-Execution.html third party advisory vdb entry
http://packetstormsecurity.com/files/158054/SMBleed-SMBGhost-Pre-Authentication-Remote-Code-Execution-Proof-Of-Concept.html third party advisory vdb entry

Frequently Asked Questions

What is the severity of CVE-2020-0796?
CVE-2020-0796 has been scored as a critical severity vulnerability.
How to fix CVE-2020-0796?
To fix CVE-2020-0796, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2020-0796 being actively exploited in the wild?
It is confirmed that CVE-2020-0796 is actively exploited. Be extra cautious if you are using vulnerable components. According to its EPSS score, there is a ~94% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2020-0796?
CVE-2020-0796 affects Microsoft Windows 10 Version 1903 for 32-bit Systems, Microsoft Windows 10 Version 1903 for x64-based Systems, Microsoft Windows 10 Version 1903 for ARM64-based Systems, Microsoft Windows Server, version 1903 (Server Core installation), Microsoft Windows 10 Version 1909 for 32-bit Systems, Microsoft Windows 10 Version 1909 for x64-based Systems, Microsoft Windows 10 Version 1909 for ARM64-based Systems, Microsoft Windows Server, version 1909 (Server Core installation).
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