Microsoft Windows SMBv3 Compression RCE (ADV200005)(CVE-2020-0796)(Remote)

critical Nessus Plugin ID 134421

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Synopsis

The remote Windows host is using a vulnerable version of SMB.

Description

A remote code execution vulnerability exists in Microsoft Server Message Block 3.1.1 (SMBv3) protocol due to how it handles a maliciously crafted compressed data packet. An unauthenticated, remote attacker can exploit this to bypass authentication and execute arbitrary commands.

Note, the plugin checks if SMB 3.1.1 with compression is enabled. It does not currently verify the vulnerability itself.

Solution

Microsoft has provided additional details and guidance in the ADV200005 advisory.

See Also

http://www.nessus.org/u?736703d3

Plugin Details

Severity: Critical

ID: 134421

File Name: smb_microsoft_windows_adv200005_remote.nasl

Version: 1.8

Type: remote

Agent: windows

Family: Windows

Published: 3/11/2020

Updated: 2/11/2022

Configuration: Enable paranoid mode

Supported Sensors: Nessus Agent

Risk Information

VPR

Risk Factor: Critical

Score: 10

CVSS v2

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

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

Temporal Vector: E:H/RL:OF/RC:C

CVSS Score Source: CVE-2020-0796

CVSS v3

Risk Factor: Critical

Base Score: 10

Temporal Score: 9.5

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

Temporal Vector: E:H/RL:O/RC:C

Vulnerability Information

CPE: cpe:/o:microsoft:windows

Required KB Items: SMB/smb_dialect/3.1.1, Settings/ParanoidReport

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 3/12/2020

Vulnerability Publication Date: 3/12/2020

CISA Known Exploited Dates: 8/10/2022

Exploitable With

CANVAS (CANVAS)

Metasploit (SMBv3 Compression Buffer Overflow)

Reference Information

CVE: CVE-2020-0796