CVE-2020-0796

critical

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'.

From the Tenable Blog

CVE-2020-0796: "Wormable" Remote Code Execution Vulnerability in Microsoft Server Message Block SMBv3 (ADV200005)

CVE-2020-0796: "Wormable" Remote Code Execution Vulnerability in Microsoft Server Message Block SMBv3 (ADV200005)

Published: 2020-03-11

Critical unpatched “wormable” remote code execution (RCE) vulnerability in Microsoft Server Message Block 3.1.1 (SMBv3), dubbed EternalDarkness, disclosed by Microsoft. Update 03/13/2020: The Proof-of-concept section has been updated to reflect the public availability of an exploit script that can trigger a crash on a vulnerable system.

References

http://packetstormsecurity.com/files/158054/SMBleed-SMBGhost-Pre-Authentication-Remote-Code-Execution-Proof-Of-Concept.html

http://packetstormsecurity.com/files/157901/Microsoft-Windows-SMBGhost-Remote-Code-Execution.html

http://packetstormsecurity.com/files/156980/Microsoft-Windows-10-SMB-3.1.1-Local-Privilege-Escalation.html

http://packetstormsecurity.com/files/156731/CoronaBlue-SMBGhost-Microsoft-Windows-10-SMB-3.1.1-Proof-Of-Concept.html

https://thehackernews.com/2025/06/hackers-target-65-microsoft-exchange.html

https://www.tenable.com/cyber-exposure/a-look-inside-the-ransomware-ecosystem

https://www.tenable.com/blog/microsofts-august-2022-patch-tuesday-addresses-118-cves-cve-2022-34713

https://www.tenable.com/blog/contileaks-chats-reveal-over-30-vulnerabilities-used-by-conti-ransomware-affiliates

https://www.tenable.com/blog/examining-the-treat-landscape

https://www.tenable.com/blog/healthcare-security-ransomware-plays-a-prominent-role-in-covid-19-era-breaches

https://www.tenable.com/blog/cve-2020-0796-wormable-remote-code-execution-vulnerability-in-microsoft-server-message-block

https://www.tenable.com/blog/cve-2020-1350-wormable-remote-code-execution-vulnerability-in-windows-dns-server-sigred

https://www.tenable.com/blog/microsoft-s-june-2020-patch-tuesday-addresses-129-cves-including-newly-disclosed-smbv3

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-0796

http://packetstormsecurity.com/files/157110/SMBv3-Compression-Buffer-Overflow.html

http://packetstormsecurity.com/files/156732/Microsoft-Windows-SMB-3.1.1-Remote-Code-Execution.html

Details

Source: Mitre, NVD

Published: 2020-03-12

Updated: 2025-04-04

Named Vulnerability: SMBGhostNamed Vulnerability: EternalDarknessKnown Exploited Vulnerability (KEV)

Risk Information

CVSS v2

Base Score: 7.5

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P

Severity: High

CVSS v3

Base Score: 10

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Severity: Critical

EPSS

EPSS: 0.94438